Q: OBD-II scanner read code P0108

asked by on

After reading the code on the OBD II auto scanner as P0108, I replaced the MAP sensor. After that I reset the code after installing new one. I continued by testing the OEM on the old one, plus the new one, and they both read 1 per OEMs meter. They are both looking good, however it did not fix the problem. The service engine light is still coming on, plus the same code, P0108 is also still shows. To explain more details, the service light had not come on immediately. I had cleared the code and then I turned the ignitions switch to On; however, I did not start my car. After waiting for 10 seconds, then I turned the ignition switch off again. After plugging in the OBD2 scan tool, I scanned for codes but there were none. After turning off the car, the code P0108 appeared once more. It does not seem that the ECM will be going out. Please give me your advice as to what I should do. Thanks.

A: Hello. The MAP sensor reading on a scanner ...

Hello. The MAP sensor reading on a scanner should read about 1.0 to 1.5 volts at idle and 4.5 to 4.8 volts at wide open throttle. The MAP should read 4.8 volts or more when you have the key on engine off. If either sensor is not within these specs, then replace have it replaced. Once you install the sensor, then clear the codes and road test the vehicle to see if code returns. If it returns, then you will need to have the entire pinpoint test done to check the wiring and ECM for problems.

Need advice from certified mechanic? Get help now!

Over 1000 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!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: When accelerating, car backfires or turns off

Hello. There is a possible recall for the ignition control module on your vehicle. You will need to contact a GM dealer and see if your vehicle is on the recall for the recall 03v231000 ignition control module failure. The...

Q: Loud bog noise will not excellerate with no codes in computer

Just because the computer does not have any codes does not mean one of the sensors is not reading correctly. If you are using an oil bath type air filter, it may have contaminated the mass air flow sensor with...

Q: Wheel bearing going out

Hi there. A faulty wheel bearing will generally cause a growling noise similar to a chopping or cupping wear on the inner or outer edge of one or more tires. To determine this, the tire on the suspected wheel of...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...