Dumbfounded by codes
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TECH Apprentice
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From: Junction City, Kansas
Dumbfounded by codes I just finished replacing the clutch on my 01 z28 and took it out for a test drive. All went well until the end. Now the car is running like a mad drag car. It is giving me backfires, misfires, extremely rich exhaust smell, etc. It isn't driveable because giving it throttle makes it choke. I started having minor backfires about a week ago. here are the codes that it gave me:
P0102 - mass airflow sensor circuit
P0300 - random multiple misfire (had that since the cam swap)
P0801 - reverse inhibit control circuit malfunction
P0803 - 1-4 skip shift control circuit
I checked all the wiring and everything is connected, nor does anything look like it is damaged. I looked at the maf and there is nothing on the sensors to give it a malfunction. I took the plug off the maf to see if the car would run smoother and it didn't. What is the problem?
P0102 - mass airflow sensor circuit
P0300 - random multiple misfire (had that since the cam swap)
P0801 - reverse inhibit control circuit malfunction
P0803 - 1-4 skip shift control circuit
I checked all the wiring and everything is connected, nor does anything look like it is damaged. I looked at the maf and there is nothing on the sensors to give it a malfunction. I took the plug off the maf to see if the car would run smoother and it didn't. What is the problem?
TECH Senior Member
Joined: Nov 2001
Posts: 7,036
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From: Lake Zurich, IL
the P0102 is going to set your car to run Speed Density... which if your car isn't tuned to do so can cause that rich smell...
The P0300 may be attributed to this too
I just got home from a local car club meeting so about to hit the sack... will look at this in the morning...
Check all fuses ... could just be a blown fuse ... did you disconnect the battery before the clutch swap?
The P0300 may be attributed to this too
I just got home from a local car club meeting so about to hit the sack... will look at this in the morning...
Check all fuses ... could just be a blown fuse ... did you disconnect the battery before the clutch swap?
I would go to the MAF and check that it has live
power and output. I think that's what P0102 is
about, total deadness. The MAF shouldn't have
anything to do with the clutch but it seems you
have a couple of transmission-related lines also
messed up, maybe a wire got bit and shorting it
took down the 5V reference power or the same
leg of 12V that runs the MAF. If you find that either
of the MAF signals (B+ or output) are down, then
this is an alley worth going down. Got DMM?
power and output. I think that's what P0102 is
about, total deadness. The MAF shouldn't have
anything to do with the clutch but it seems you
have a couple of transmission-related lines also
messed up, maybe a wire got bit and shorting it
took down the 5V reference power or the same
leg of 12V that runs the MAF. If you find that either
of the MAF signals (B+ or output) are down, then
this is an alley worth going down. Got DMM?
Thread Starter
TECH Apprentice
iTrader: (15)
Joined: Nov 2003
Posts: 399
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From: Junction City, Kansas
I checked all the fuses under the hood and the 20Amp engine sensor fuse was blown. Getting a new one now. What I want to know is what made it blow? Would it be anything besides a shorted out wire.
TECH Senior Member
Joined: Nov 2001
Posts: 7,036
Likes: 1
From: Lake Zurich, IL
Originally Posted by my01camaroz28
I checked all the fuses under the hood and the 20Amp engine sensor fuse was blown. Getting a new one now. What I want to know is what made it blow? Would it be anything besides a shorted out wire.
When I was popping Engine Sensor fuses left and right it was because my driver side O2 (front) wire was hitting my header, eventually it melted though and then whenever it touched the header POP
the MAF, O2 heater, O2 sensors are all on this engine sensor fuse... sounds like the other two codes are too
