Po446 code chevy silverado

Jul 15, 2024
Oct 11, 2021 · The P0446 error code is an Onboard Diagnostic-II (OBD-II) Trouble Code. It signifies a problem in the vehicle’s Evaporative Emission Control (EVAP) system vent control circuit. To simplify, your computer-controlled emission system uses a complex network of sensors and valves to limit the amount of fuel vapors escaping into the ….

May 4, 2017 · Jim Musselman Discussion starter. 1 post · Joined 2017. #1 · May 4, 2017. My 2006 Silverado threw the code P0446 (EVAP Vent circuit malfunction). I looked at some of the other boards online as to find out how to fix. I have replaced the purge valve solenoid in the engine compartment and the vent valve solenoid under the truck.2014 Chevrolet Silverado code p0446How do you fix the po446 code on a 2001 Chevy silverado? ow do you find out where the parts are on a 2001 silverado for the emission control systemOxygen Sensor. The P0171 code is thrown when the bank one sensor one O2 sensor reports that your Silverado’s engine is running lean. The sensor on or right after the exhaust manifold is typically the sensor that reports the lean condition. If it is malfunctioning, it can cause a false P0171 code. Swap Test.P219A is a generic OBDII code. The code indicates that your Chevy Silverado's air/fuel ratio is out of balance (too rich or too lean). Your Silverado is equipped with oxygen sensors that measure the air-fuel ratio of your engine. It's these sensors that are reporting the problem with the air-fuel ratio.A prevalent issue with the Chevy Tahoe is the P0446 code. This code corresponds to a specific number obtained when connecting your Tahoe to an OBDII scanner. A faulty vent control valve most commonly causes P0446. Table of Contents Definition Symptoms Causes Diagnosis How to Fix P0446 Definition P0446 is a standard OBDII trouble code,2016 Chevy Silverado check engine light came on with code 0446 4 month ago and I switch the sensor and now the code came up again n my truck feels loft when I accelerate after being stopped Chevrolet Silverado's EVAP system. ... Code read as p0446 and 4 month ago I change the sensor because it also read as p0046.This trouble code is a reference number that is given to you when you plug your Silverado into a OBDII scanner. P0449 deals with the evaporative emissions control system. It often appears with, or is related other codes, such as P0420, P0446, and very often P0440. P0449: Evaporative Emission Control System Vent Valve/Solenoid Circuit …po452 and po446 on 04 chevy silverado have replaced fuel pressure sensor and reset but code po452 keep poping up - Chevrolet Silverado 1500 question. Search Fixya ... Code p0446 and po452 installed new fuel pump and replaced a pressure sensor already. Also replaced the solenoid but I'm still getting the p0452.To diagnose the P0446 2015 Chevrolet Silverado code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.Mar 1, 2022 · Check engine light code P0446 means EVAP Vent Control Circuit Malfunction. ... I have a 1998 Chevy Silverado C1500 (5.7L). Getting codes P0446 and P1441 Where does ...The P0446 fault code is related to the Evaporative Emission (EVAP) system in your automobile. It specifically tests for any restrictions or blockages in the EVAP vent path, which can cause excessive vacuum pressure to build up in the system. When this fault code is triggered, the Engine Control Module (ECM) commands the EVAP purge solenoid ...What's been done so far: 1: I scanned for codes, came up with P0446, did some looking around on the forums, and suggested he try to use compressed air to clean out the canister solenoid valve under the frame near the gas tank. 2: Instead of trying to clean it, he had a mechanic replace it. GM part number 19207762.GM PO446 trouble code "Service engine soon" light came on. My "PocketScan Plus" reads a PO446 code. The description - Buick 2000 Park Avenue question. ... Code 446 P0446 Chevrolet Description The Powertrain Control Module monitors the performance of the Evaporative Emission ...in this video I will share with you how to diagnose and Repair the Root cause of a P0446 on a Chevy ImpalaThe PCM seals the EVAP system by commanding the EVAP Purge Solenoid OFF and the EVAP vent valve ON. The PCM monitors the fuel tank pressure sensor in order to determine if the EVAP Purge Solenoid is leaking vacuum to the EVAP system. P1441 Chevrolet Code - EVAP System Flow During Non-Purge Condition.Here are the most common causes of P0175 in the Chevy Silverado: Vacuum Leaks- With the Chevy Silverado, a vacuum leak is one of the most common causes of the P0175 code.Take a look around and see if you can find a vacuum leak. Here's a great YouTube video on how to find a vacuum leak.; Oxygen Sensor- The P0175 code is thrown when the B2S1 O2 sensor does not register the right amount of ...5 Aug 2017 ... Chevy Silverado Evap P0446 Diagnosis and Fix | Using Scan Data and Critical Thinking ... Engine light on with EVAP code in your car or truck?nealinator. 18285 posts · Joined 2015. #2 · Aug 30, 2018. Well the U0073 & U0100 look like an ECM failure or maybe there is a disconnect or wire issue somewhere. Those darn P0446 type emissions codes can be a pain. Looking for hoses with cracks or disconnects or checking the vent solenoid is most likely culprit. TPMS would be completely separate.2005 Chevrolet Silverado 2500 HD 6.0 L Automatic. Getting a P0446 code. Replaced the Vent valve and hoses. Did the service bay test. On phase 3 it comes back with lost communication and set a P0449 co … read moreThis video is about chevy Silverado EVAP p0446 diagnosis and fix. If your check engine light is on with a P0446 this video will run you through the diag proc...Feb 15, 2021 · I try to diagnose a P0446 evap code. And I get some new sunglasses.Here's a table with all the reasons and fixes to the code P0442 on a Chevy Silverado. I'll go over these in better detail later on. Reason. Fix. Damaged or loose gas cap. Tighten the cap or replace it. Disconnected or leaking EVAP hose. Check your hose for leaks, and fix them or replace them.Once a calibrated vacuum level has been reached, the ECM commands the EVAP purge solenoid valve Closed and the EVAP vent solenoid valve Open. The ECM monitors the Fuel Tank Pressure (FTP) sensor for a decrease in vacuum. If the vacuum does not decrease to near 0 in H2O in a calibrated time, this DTC sets. P0446 2014 Chevrolet Silverado Code ...Reading code p0446 and changed purge valve. Light is still on and truck is now running rough. 4.3 liter year 2094 Chevy - Answered by a verified Chevy Mechanic. ... I have a 2001 Chevy Silverado 1500 LS with a 5.3 Liter andXXXXX I had 2 codes: P440 and P442. I found the GM bulliten referring to remoting the Evap vent valve etc.Dec 5, 2023 · The P0449 code is a common diagnostic trouble code (DTC) that is specific to Chevrolet Silverado vehicles. This code is related to the EVAP (evaporative emission control) system and indicates an issue with the vent valve/solenoid circuit. The EVAP system plays a crucial role in controlling vehicle emissions by capturing and storing fuel vapors ...So, a P0446 code is showing up on your Chevy Silverado, and you have no idea what it is. No need to worry! We are here to help you understand what P0446 in a Chevy means, what causes code P0446, and how you can solve it as soon as possible. OBD-II codes should not be taken lightly, especially when you do not know what it is.Po446 code on my 2004 tahoe, difficulty pumping gas, like the vent is clogged - Answered by a verified Chevy Mechanic. ... I work at advance auto parts and i cant figure out what this code means exactly, po446, 99 chevy silverado 5.3 half ton please help me ...The P0446 fault code stands for Evaporative Emission Control (EVAP) system vent control circuit malfunction. Put in simpler terms, this code indicates that there’s a problem with the vent valve, the control circuit for that valve, or a blocked vent valve in the EVAP system. What this means for the driver is that the car will most likely ...P0446 2007 silverado 1500 5.32003 chevrolet silverado code p0446 diagnostico facil Chevrolet silverado 2500 hd classic lt 2001 q&a: gm dtc p0107, chevroletChevy silverado p0741 obdii code diagnosis. Check Details Po449 code evaporative emission system vent control circuit intermittent.P0332 is a powertrain related OBD-II trouble code. It has the same meaning for the Chevy Silverado as it would any other vehicle. By definition, P0332 means that the vehicles ECM/PCM is getting a signal that is lower than the defined operational range from the knock sensor (Sensor 2 | Bank 2). Clearing this code.A logged P0463 code means that a high voltage signal is detected from the fuel level sensor, resulting in inaccurate fuel gauge readings. A faulty fuel level sensor circuit or sending unit, damaged body computer, PCM issues, and a faulty smart fuse box are common reasons why this code is triggered. Aside from inaccurate fuel level readings, a ...Engine-Codes - Chevrolet - P0443 Chevrolet. P0443 Chevrolet Code - Evaporative Emission Purge Solenoid Valve Control Circuit. - Code Popularity: 54,146 Views. - Repair Importance Level: 1/3. - Repair Difficulty Level: 3/3. Table of contents. Created and updated by William Orellana on Jun 27, 2022. Possible Causes.What Causes Code P1516 on Chevy Silverado. The P1516 code is caused by ECM when it detects an unusual throttle position. When the ECM finds the throttle position out of range, it reduces the engine speed for safety. Now, you may ask why the throttle position goes unusual. Here's why: Inadequate TAC module. Harness of open or shortage TAC module.P219A is a generic OBDII code. The code indicates that your Chevy Silverado's air/fuel ratio is out of balance (too rich or too lean). Your Silverado is equipped with oxygen sensors that measure the air-fuel ratio of your engine. It's these sensors that are reporting the problem with the air-fuel ratio.Re: 2004 Silverado with P0446 code, pleae help. by LOBO2 » Fri Nov 27, 2015 1:22 pm. I never received any info from Chevy when the bulletin was released. I didn't ask what they did specifically to "fix" the code. It was between $250.00 - $300.00 for the repair.2009 chevy 1500 with a 5.3 i have codes po446 andpo451. Silverado. I replaced the fuel pump evep solenoid purge valve - Answered by a verified Chevy Mechanic. We use cookies to give you the best possible experience on our website. ... Chevrolet Silverado 1500: I am trying to diagnose an 2005 silverado.If you’re looking into buying a dependable new or used truck, you’ve likely come across the 2020 Chevy Silverado in your search. The Silverado is consistently one of the most popul...The P0445 code tells us that it is an electrical problem in the EVAP purge control valve circuit, and not a leak in the EVAP system. How to diagnose the P0445 Code. Diagnosing a P0445 code can be done if you have basic knowledge of car electronics and have a multimeter at home. Here's how a professional mechanic would diagnose the P0445 code.Jan 26, 2023 · A P0452 Diagnostic Trouble Code (DTC) in a Chevrolet Silverado indicates a low voltage issue with the vehicle’s evaporative emission control system. This code is set when the PCM (Powertrain Control Module) detects a voltage level that is lower than the expected level. Common causes of a P0452 DTC in a Chevrolet Silverado include a …2007 chevy silverado crewcab 4x4 have evgine code po446, what does this mean? Submitted: 13 years ago. Category: Chevy. Show More. Show Less. ... I work at advance auto parts and i cant figure out what this code means exactly, po446, 99 chevy silverado 5.3 half ton please help me ...The cost of diagnosing the p0446 2017 chevrolet silverado code is 1.0. Web Code P0446 2016 Chevrolet Silverado Description. Web introduction to the p0446 code and its significance the p0446 code is a diagnostic trouble code (dtc) that indicates a problem with the evaporative emission. Web a trouble code p0446: Web what is the cost to diagnose ...So, a P0446 code is showing up on your Chevy Silverado, and you have no idea what it is. No need to worry! We are here to help you understand what P0446 in a Chevy means, what causes code P0446, and how you can solve it as soon as possible. OBD-II codes should not be taken lightly, especially when you do not know what it is.Subject: Check Engine Light On, Fuel Tank Hard to Fill, DTCs P0442, P0446, P0455 or P0449 Set (Replace ... Models: 1999-2007 Chevrolet Silverado (Classic) Models 1999-2007 GMC Sierra (Classic) Models 2007-2010 Chevrolet Silverado Models (Including Hybrid) 2007-2010 GMC ... Chevy silverado 2004 1500 code po449 e vap system vent control ...There are two very common, very easy fixes to solve a P0442 Engine Code: Changing the Canister Vent Solenoid and changing the Purge Valve Solenoid. In this...How to Fix the P0785 Code. There's no single solution for troubleshooting a P0785 code. You'll have to take your vehicle's make and model into account in order to determine the possible issues that are triggering your DTC.What might work to resolve a P0785 code for a Chevy might not work for a Honda.There are vehicle-specific diagnostic and repair procedures you must follow to avoid ...Jan 14, 2023 · 1. Check For Other Codes. Additional codes can offer critical info about your Silverado’s condition. Rarely does P0175 Chevy show up alone (if it does look for a vacuum leak, bad O2 sensor, or dirty MAF).. 2. Spot The Weird Odor. While the engine operates, a strong gas smell could be coming from a leaky injector or a fault with fuel regulation.With its 1950s styling, the 1957 Chevy is a timeless car. This article will show you how to draw this cool classic car in just five simple steps. Advertisement The 1957 Chevy is on...Trouble code P0446 typically turns up in On-Board Diagnostic testing on account of an illuminated Check Engine Malfunction Indicator Lamp. This generic OBD-II code indicates that the evaporative vent valve in the emission control system is malfunctioning. When this occurs, the EVAP system may not be capable of pressurizing and maintaining a ...P0171and p0174 code can be caused by : The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.The P0446 code is most like a bad vent solenoid for the EVAP system. P06DD is a known code to come up due to a defective oil pump. In order to diagnose that and fix it requires replacing the timing chain. The other code (P0011) is most likely the camshaft position actuator which is pretty common to go bad. The P06DD is the code that is concerning.Trouble codes po151,po174 and po300 for a 2001 chevy p.u.Chevy silverado p0332 code knock sensor located where Chevy silverado 4.3l with po171 and po174Chevrolet silverado 1500 questions. P0171 p0174 sierra silverado, my fixP0171 p0174 autozone diagnostic 2003 chevy avalanche dtc"s: p0171,p0174,pp0300,p0332 how canSuburban silverado located ...Chevrolet Silverado 1500: hi im roselin i have 98 chevy silverado hi i'm roselin i have 98 chevy silverado 5.7 hard to start and i put the scanner and i give this code P0125B, P0161B, p0446, p0453, p0452, …6 Answers. SOURCE: Code PO446 - Evaporative Emission System Vent. The evap canister has a valve on it check the pigtail on the valve and make sure its plugged in good . there is a fuse for it as well . if the fuse is good and the plug is tight . replace valve . Its common for these to go bad . Posted on Nov 01, 2010.P0446 Code. I've got a 2001 Silverado 1500 with the 4.8 V8. The truck has 84,000 miles on it and has the P0446 code and P0446 pending code. I did some research and replaced the vent solenoid thing between the cab and bed. The light came back on two days later. I decided to replace the gas cap, and the light came on again.9 Nov 2020 ... Comments18 ; P0446 Explained - EVAP Emission Control System Vent Control Circuit Malfunction (Simple Fix). FIXD · 363K views ; Chevy Fuel Evap ...Hey everyone, I have a 2003 gmc sierra 1500 4.8 2wd that is throwing a p0446 code: Subject: DTC P0446 (Restricted/Blocked EVAP Vent Path) Set, Service Engine Soon (SES) Lamp Illuminated (Replace Hose/Evaporative Emission (EVAP) Canister Vent Asm) #02-06-04-037AShop for New Auto Parts at 1AAuto.com http://1aau.to/c/240/A/evap-emission-control-system-partsEVAP Explained! It's one of the most common OBDII trouble code...I frequently get a CEL for code P0446---faulty evap canister solenoid. Well, I live in the southern Nevada desert where I am in lots of dust all the time! ... Chevy Silverado and GMC Sierra Forum. 1.4M posts 184.6K members Since 2009 A forum community dedicated to Chevrolet Silverado and GMC Sierra pickup owners and enthusiasts. ...What Does the P0454 Code Mean? Diagnostic trouble code (DTC) P0454 stands for "Evaporative Emission System Pressure Sensor/Switch Intermittent.". The EVAP System. A typical EVAP system consists of a charcoal canister, a purge valve/solenoid, a vent control valve/solenoid, an EVAP emission pressure sensor, as well as other metal tubes and rubber hoses.Jul 16, 2020 · The fault code P0446 in the 2004 Chevy Silverado means that the computer has detected an electrical issue within the EVAP system vent control. The ECM sends a signal to the vent control valve to purge the gas vapors from the charcoal canister and directs them to the engine. When the P0446 fault happens, they vapors arent being purged. This can happen because of something as simple as a loose ...Aug 7, 2018 · A prevalent issue with the Chevy Malibu is the P0446 code. This code corresponds to a specific number obtained when connecting your Malibu to an OBDII scanner. A faulty vent control valve most commonly causes P0446. Table of Contents Definition Symptoms Causes Diagnosis How to Fix P0446 Definition P0446 is a …Chevrolet Silverado 1500: I am trying to diagnose an 2005 silverado. I am trying to diagnose an 2005 silverado 5.3 2wheel drive pickup. It came into my shop with a po446 trouble code. ... I work at advance auto parts and i cant figure out what this code means exactly, po446, 99 chevy silverado 5.3 half ton please help me ...What Causes Code P1516 on Chevy Silverado. The P1516 code is caused by ECM when it detects an unusual throttle position. When the ECM finds the throttle position out of range, it reduces the engine speed for safety. Now, you may ask why the throttle position goes unusual. Here's why: Inadequate TAC module. Harness of open or shortage TAC module.Aug 7, 2018 · A prevalent issue with the Chevy Colorado is the P0446 code. This code corresponds to a specific number obtained when connecting your Colorado to an OBDII scanner. A faulty vent control valve most commonly causes P0446. Table of Contents Definition Symptoms Causes Diagnosis How to Fix P0446 Definition P0446 is a …April 1, 2020 by Jason. Like all OBD-II trouble codes, P0451 has the same meaning for all vehicles. It means that your Chevy Silverado 's EVAP system has a pressure sensor that is malfunctioning in some way. P0451 is usually caused by either a bad EVAP pressure sensor, a clogged fuel tank relief valve, EVAP lines, EVAP wiring, or a bad fuel cap.thank you for watching!!!!!If this video was helpful to you and if you would like to place a donation, here is my Venmo and PayPal information. Or I would re...I have a 2003 Chevy Silverado 4.3L V6 Auto 240K that has been frustrating finding the cause. Our Address ... Looking into the P0446 code I read that the name of the code is specifically the vent valve circuit malfunction and as an electrical engineer I decided to do some tests because he was under the impression that it was the PCM gone bad. ...Jul 21, 2022 · Repair Information for P0446 2017 Chevrolet Silverado code. Learn what Evaporative Emission Vent System Performance means, location and how to repair? This Diagnostic Trouble Code (DTC) tests the Evaporative Emission (EVAP) system for a restricted or blocked EVAP vent path that would cause excess amounts#02-06-04-037F: DTC P0446 (Restricted/Blocked EVAP Vent Path) Set, Check Engine Light On (Replace Evaporative Emission (EVAP) Vent Valve Solenoid Assembly and Add/Relocate Filter Box Using Service Kit) - (Aug 5, 2009) I just fixed this problem. I installed the updated evap part, a new gm fuel pump and the PO446 code was gone.

Did you know?

That Blair J. 50 posts · Joined 2020. #2 · Feb 28, 2021 (Edited) Two of the most common and successful fixes for the P0446 code is to replace the vent valve solenoid, as you have already done, or replace a faulty fuel tank pressure sensor. For me the cause of the P0446 code was a faulty fuel tank pressure sensor. When I replaced it, finally the ...Summary. DTC P2635 stands for "Fuel Pump "A" Flow Performance.". It's logged when the fuel pump control module detects that the fuel pump isn't meeting the correct fuel pressure. Fuel pump failure, fuel pump control module failure, and wiring problems are some of the issues that could trigger this trouble code.

How Jan 7, 2023 · Trouble code P0446 stands for an Evaporative Emission Control System (EVAP) Vent Control Circuit Malfunction. This code means that the car’s computer detected trouble with the EVAP system vent …P0446 Code. I've got a 2001 Silverado 1500 with the 4.8 V8. The truck has 84,000 miles on it and has the P0446 code and P0446 pending code. I did some research and replaced the vent solenoid thing between the cab and bed. The light came back on two days later. I decided to replace the gas cap, and the light came on again.2005 Chevrolet Silverado 2500 HD 6.0 L Automatic. Getting a P0446 code. Replaced the Vent valve and hoses. Did the service bay test. On phase 3 it comes back with lost communication and set a P0449 co … read moreSilverado 1500. 2020. The p0451 code for the Chevy Silverado means that there is something wrong with the purge valve. The evap canister, also known as the purge valve, on the car is located to the left of the brake booster and master cylinder on the driver side firewall. The EVAP canister is filled with activated charcoal and is designed to ...10 Aug 2021 ... engine light on a cateye Chevy Silverado. The code is P0446, it sets the check engine light and is more of an annoyance than a problem. We ...

When A little bit ago my engine light came on and I got the code PO442. ... I had one code, PO442. Replaced gas cap and solenoid. After, starting seemed fine. Then I got the PO446 and after I filled up I got the hard start. Any help is appreciated. ... A forum community dedicated to Chevrolet Silverado and GMC Sierra pickup owners and …Aug 7, 2018 · Conclusion. P0446 is a diagnostic trouble code (DTC) associated with a vehicle’s evaporative emissions control system. It signifies an issue in the vent control circuit in your Chevy Monte Carlo’s EVAP system, which prevents fuel vapor from being released into the atmosphere. A prevalent issue with the Chevy Monte Carlo is the P0446 code.Diagnostic code #P0446. 2001 Chevrolet Silverado 1500. Asked by BYM in Marysville, WA on . July 25, 2010. ... 2001 Chevrolet Silverado 1500 Estimates. Coolant Change ($583 - $610) in Matthews, NC. Find a Shop. Chevrolet Repair in Lubbock, TX; Chevrolet Repair in Lewisburg, WV;…

Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. Po446 code chevy silverado. Possible cause: Not clear po446 code chevy silverado.

Other topics

minute clinic sports physical price

rudder funeral home obituaries stevenson al

i 65 accident nashville today P0446 is a diagnostic trouble code (DTC) associated with a vehicle’s evaporative emissions control system. It signifies an issue in the vent control circuit in your Chevy Malibu’s EVAP system, which prevents fuel vapor from being released into the atmosphere. A prevalent issue with the Chevy Malibu is the P0446 code.2014 Chevrolet Silverado code p0446 kwik trip butter prices todayh5322 044 When you notice P0496 on your scanner, it simply means that your vehicle's computer believes the EVAP system is purging gasoline vapor when it shouldn't. Keynote Prior to OBD2, systems cleansed the canister only when the engine was above idle and heated. OBD2 systems have the ability to purge the canister at any moment the engine is ...P0171and p0174 code can be caused by : The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry. navmc 10274yahoo pick'em tiebreaker ruleszillow weakley county tn Understanding P0101 OBD-II Trouble Code. Headline: Unraveling the Mystery: Decoding the P0101 Diagnostic Trouble Code in a Chevy Silverado. If you're a dedicated Chevy Silverado aficionado like many of us, this beast's P0101 Diagnostic Trouble Code (DTC) might be all too familiar. waldo flea market florida The P0446 fault code is related to the Evaporative Emission (EVAP) system in your automobile. It specifically tests for any restrictions or blockages in the EVAP vent path, which can cause excessive vacuum pressure to build up in the system. When this fault code is triggered, the Engine Control Module (ECM) commands the EVAP purge solenoid ...Subject: Evaporative DTCs P0442, P0446, P0455 or P0449, Caused by Dust Intrusion into the Evaporative Canister and Canister Vent Solenoid Brand: Model: Model Year: VIN: Engine: Transmission: from to from to Chevrolet Silverado 1500 (New Model - 12th VIN Digit = 7) - 4WD 2019 2019 All All Silverado 1500 (New Model) Silverado 1500 2020 2023 ... j2badd twerkverilife menu williamsportpowerful sda sermons pdf P0449 Failure Symptoms. Engine code P0449, P0440, P0441, P0446. Poor idling. Out of spec air-to-fuel ratios. Difficulty starting the engine, in some cases. If you have a small leak, you might not notice any symptoms. While the issue can cause some performance issues from AFR's, it is usually not serious enough to cause major engine damage.