Q: The gasket is deteriorated in the intake manifold gasket

asked by on

Do I need to replace the whole intake manifold gasket? I was told I only need to replace the gasket. The code is P0171.

My car has 140000 miles.
My car has an automatic transmission.

If the gasket does have to be replaced it is replaced as a "whole". There is no partial intake manifold gasket. Please note that the code you are writing in about, Diagnostic Trouble Code P0171, can set for many reasons other than a failed intake manifold gasket. Not only does the gasket and adjacent assembly have to be tested for leakage and correctly diagnosed as "the" fault behind the code setting but all the other possible causes of the code setting have to be considered as well. If you did not receive a conclusive diagnostic, preferably written, indicating that that gasket must be replaced, then prior to the work it really has to be diagnosed. The other common causes of Code P0171 include the MAF (Mass Air Flow) sensor is dirty, faulty, or in some cases the MAF sensor has leaked the silicone potting material used to protect the circuitry. In addition to intake gasket leaks, there could be a cracked vacuum or PCV line/connection, faulty or stuck open PCV valve, failed or faulty oxygen sensor, sticking, plugged or failed fuel injector, low fuel pressure due to a possibly plugged and/or dirty fuel filter and an exhaust leak anywhere ahead of the first oxygen sensor. If you desire that the intake gasket be diagnosed and replaced, as needed, simply request intake manifold gasket repair and the responding certified mechanic will make the replacement as well as advise you as to these other possible causes of the code setting.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. The gasket is deteriorated in the intake manifold gasket

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: I need to know if the springs on my poli classic needs fixing please

Hello there, vibrations and bumps felt through your 2007 Volkswagen are common as the vehicle ages. By replacing the struts you are off to a good start. There are a few other things to consider, a broken or worn spring,...

Q: My 2005 Toyota Corolla started shaking and then died what could the problem be

You may have lost ignition or fuel pressure? Have computer scanned for cam or crank sensor failure and have fuel pressure tested to see if fuel pump is bad?

Q: I recently had the starter and manifold gaskets replaced. Now my truck won't stay running.

It definitely sounds like you still have a vacuum leak somewhere around the repair area. Inspect all of the vacuum hoses for cracks and replace as necessary. Also inspect the throttle body gasket for damage as well as the vacuum...

Related articles

What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.