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CEL problem codes, P0102, P0300, P1381 and a few more UPDATED!

buickman104

buickman104

New member
Yesterday when driving to my girlfriend's home I suddenly got a check engine light. I looked up the codes on my Aeroforce and got these 3 codes.

I know the P0102 is a MAF code. I'll try cleaning it.
The P0300 is a multiple misfire code. Ned to get my ignition checked out again.
The P1381 code I have no idea. On different models it means different things. Any suggestions?


I also wonder why I would get all these codes simultaneously?

After I parked my car and came back to it 10 hours later the check engine light was gone. Might be gone for now, but I would rather figure these problems out now before they grow.
 
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Re: CEL problem codes, P0102, P0300, P1381

The PCM uses data from the ABS to distinguish crankshaft speed variations from actual misfires p0300. If there is a loss of communication from the wheel speed sensors while P0300 has set a MIL then P1381 will set.
 
Re: CEL problem codes, P0102, P0300, P1381

Rico said:
The PCM uses data from the ABS to distinguish crankshaft speed variations from actual misfires p0300. If there is a loss of communication from the wheel speed sensors while P0300 has set a MIL then P1381 will set.
Click to expand...
Does that mean my crank sensor might be bad?

plugs are Autolite104's with 5,000 miles on them and wires are PRJ with 15,000 miles. All my coil packs are new and a junkyard ICM because my last one went bad.
 
Re: CEL problem codes, P0102, P0300, P1381

To be quiet honest I think the code (P1381) may be a fluke in your situation. Clean the MAF, run it and see what happens before you come to any conclusions.
 
Re: CEL problem codes, P0102, P0300, P1381

Got the same combination of CEL again. This time the engine is heavily hesitating.
 


Re: CEL problem codes, P0102, P0300, P1381

I've cleaned it and currently looking for a replacement. could all this be caused by a bad maf?
 
Re: CEL problem codes, P0102, P0300, P1381

Got a good MAF from a local on NYMCGP. It worked wonderfully. Killed all my KR and I was now getting 15 degrees of timing. Last night I was driving home and the check engine light came on and now got a new medley of codes...

P0102- MAF code AGAIN!

P0243- Seems like a BBV malfunction code. Correct me if I am wrong.

P0300- Mulitiple missfire- I have noticed I only get light miss fires at idle when warming the engine up. Never seen miss fires while actually driving.

P0443- Evap Code. That's new

I am wondering why I am getting all these codes in one shot. I am starting to suspect that maybe something might be wrong with my wiring harness. IDK anymore.
 
Check the pcm connections. Also the electrical connector for the maf. Scottdogger is the resisdent expert that tells us about the wires getting old and brittle over the exhaust. Your's are likely worse than most considering the under hood temps in your city car.
 


Checked my issue out with Enrique today. Definitely seems like an electrical problem. My boost bypass, evap, and maf seem to all be dead. Tried another maf and still nothing. For you wiring experts is there a common ground between those sensors or does anyone have a wiring harness schematic to help us make sense out of what could be wrong.
 
Here are some ground references:

01GroundPCM-ICM-MAF-Bat-EBCM.jpg





MAF-EGR-EVAP-97-03.jpg
 


Went over the wiring today with a multi-meter. The pigtails to each of those sensors show no voltage. I checked other sensor pig tails and they were all fine. Tomorrow morning i plan on checking for blown fuses.
 
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