IDK where to start...
Thread Starter
TECH Addict
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Joined: Jul 2006
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From: Wood River, IL
IDK where to start... My check engine light is on. It's ready high and low input from the maf sensor, bank 1&2 sensor 1 heat sensor malfunctions, and 1-4 upshift malfunction. I replaced one of the heat sensors and it still is showing a malfunction somehow. The 1-4 upshift was tuned OUT. The MAF I think might be dirty. I'm trying to find some maf cleaner. Anyone know where I can get some? Could a aluminum/ported intake, which I have on the car now be causing these problems? The car was tuned with the plastic/un-ported intake on. All the fuses check out. Any ideas? I'm lost on how the heat sensors are malfunctioning?--They're brand new.
my computer was showing all types of codes when my pcm started to go out. first the torque converter stopped locking, then the AC wouldn't kick on, then the air intake temp sensor stopped reading.
After i tried for hours to fix each problem, as a last ditch effort i replaced the pcm with a junk yard unit and everything went back to normal.
After i tried for hours to fix each problem, as a last ditch effort i replaced the pcm with a junk yard unit and everything went back to normal.
TECH Senior Member
Joined: Dec 2001
Posts: 5,399
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From: Jacksonville, FL
If it's also harder to move the shifter over towards reverse double check your ENG SEN fuse for an open. The MAF, 02's, skip shift and reverse lockout are all on that same circuit.
Thread Starter
TECH Addict
iTrader: (10)
Joined: Jul 2006
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From: Wood River, IL
That's exactly what's wrong. I have to force it into reverse. I checked the egn sen fuse and it isn't blown... not sure if open means blown?
TECH Senior Member
Joined: Dec 2001
Posts: 5,399
Likes: 3
From: Jacksonville, FL
Yeah open means blown. I'd replace the fuse anyway with a known good one, then see if the reverse lockout goes back to normal. Too much of a coincidence, has to be something on that circuit. Friend of mine had something similar and we found an 02 sensor harness melted/arcing on his LT which blew the fuse and threw P0102 first.
