HOW DO I KNOW IF MY CRANK POSITION SYNCHRONIZER IS BAD ON MY F150 BECAUSE ITS NOT IDLING CORRECTLY.

2002 Ford F-150

Tiny

fpierce

February, 4, 2012 AT 1:16 PM

The engine light is on and the code came back with an 02 sensor I replaced it, didn't work. The reason why I think this is the issue is because a friend of mine was having the same issue with his truck and his mechanic replaced it. My friends truck runs fine now, so before I replace it I would like to know how to test it. It looks to be a pain to do. Thank you

FOUND 1294 RELATED QUESTIONS

Dies On Idle

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4 Answers

Tiny

KHLow2008

February, 4, 2012 AT 2:42 PM

What is the exact trouble code you are getting?
After replacement of the O2 sensor, is the trouble code the same?
Did you check the O2 sensor circuit?

Tiny

fpierce

February, 4, 2012 AT 5:18 PM

Ok I went to get the codes read here's what I got p1131 p1151 p0171 and p0174

Tiny

mhpautos

February, 5, 2012 AT 12:56 AM

P1131 O2 sensor not heating.
P1151 same as above
P0171 & P0174 lean mixture.

With all these codes I would be checking the air flow meter first.

Tiny

KHLow2008

February, 5, 2012 AT 5:36 AM

Did you test the O2 sensor circuit? When a sensor is replaced and it is not responding, it could be a open circuit instead of a faulty sensor.

Mhpautos is corrct about the MAF being a possible cause.

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