Q: What do I do when the MAF isn't creating enough ground to the ECM module?

asked by on

Okay so I left i morning to go to work and my truck lost power and wouldn't accelerate then when it slowed down to s stop it died and wouldn't start again. The first thing I thought it was, is the fuel pump. But that wasn't the case had a fair amount of pressure going to the engine. Then ran a scan on it and got the code p0102 for the maf. Then we tested the connection, I read on the internet that the ground to the emc is suppose to be close to 12 volts and it wasn't pushing more than 2.4 volts and realized there was a bad connection to the ground from the emc module. Where should I start to fix this problem? Also it would start but it is hard and it runs really erratic and then stalles out

My car has 182000 miles.
My car has an automatic transmission.

Hi there. First, check the harness connection on the sensor for any burned or corroded pins. That will cause a restriction and make the power drop. If the harness is good on the plug end, then disconnect the harness from the computer with the battery disconnected, and check resistance on the wires to locate the power wire from the MAF sensor to the computer. Then, check the other circuit on the MAF sensor harness for a ground and get a reading.

The resistance should be no more than 1.5 ohms. If the resistance shows a lot more, then there is a break in the wire and the harness needs to be fixed or replaced. If the readings are good, then there is a problem with the ECM and it needs replacing due to a burned circuit inside the computer.

If you need further assistance troubleshooting your vehicle, then seek out a professional technician, such as one from YourMechanic, who can come to your location to assist you with the ground issue to the ECM module.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. What do I do when the MAF isn't creating enough ground to the ECM module?

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: Ford Crown Victoria ex-police r they reliable? r they cheap to maintain and repair?

The Ford Crown Victoria has been around a long time and has been driven in the snow by many people. The police use the car cause it is reliable and one of last larger cars without going to a SUV....

Q: Ruined ECM

Hello. If your issue is a ruined ECM, then it is likely that the ECM merely failed, or that a wiring issue caused it. Code 12 indicates that the computer is ready to communicate codes to you. If no codes...

Q: I have a 1997 ford ranger. I was informed by highway patrol last night that none of the lights on the rear of the truck are workin

Hello, thank you for writing in. There are several different lights at the rear of the vehicle. They are run off of different circuits to control them separately and in order to keep them from all going out at once....

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 Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...