un-hooking battery to erase codes
Thread Starter
TECH Enthusiast
Joined: Aug 2005
Posts: 701
Likes: 0
From: crossett, Arkansas
UPDATE misfire cylinder #8 does this infact work to unhook the positive cable for like 30 min to erase the SES light? i had a fault wiring on my 02 sensor bank 1 and i rewired it and fixed it. this is the second time this has happend. and my car started running really rough the first time. and it began to do it again. esp on idle and slowly moving oyu can feel the car pulse/ and even the exhaust note is different. though the first time i rewired it i crossed wired the 02 sensor lol.
and my car got all wierd
when i was driving the ses would flash and when i was stopped it would just stay on lol. so i def knew i had messed up the first time.
anyhow. just wanting to know if un-hooking the battery for a time will erase the code and make the light go off.
and my car got all wierd
when i was driving the ses would flash and when i was stopped it would just stay on lol. so i def knew i had messed up the first time.anyhow. just wanting to know if un-hooking the battery for a time will erase the code and make the light go off.
Last edited by GXPPOWER; Jan 6, 2007 at 10:13 PM.
TECH Senior Member
Joined: Dec 2001
Posts: 5,399
Likes: 3
From: Jacksonville, FL
Unhooking battery power will reset the PCM, not sure on the time though. If you don't have any other way to reset it try:
Turn key on, don't start car
Pull PCM BATT and PCM IGN fuses in engine compartment
Wait 5-10 min
Turn ignition off
Replace fuses
No tools required. After resetting PCM it will have to relearn idle and be grumpy. Some codes set immediately, some only after X amount of ignition cycles.
Turn key on, don't start car
Pull PCM BATT and PCM IGN fuses in engine compartment
Wait 5-10 min
Turn ignition off
Replace fuses
No tools required. After resetting PCM it will have to relearn idle and be grumpy. Some codes set immediately, some only after X amount of ignition cycles.
Thread Starter
TECH Enthusiast
Joined: Aug 2005
Posts: 701
Likes: 0
From: crossett, Arkansas
more issues well i went to get my car scanned just to make sure the o2 sensor was still the only thing wrong well...... it wasnt 
these were the original codes
P0134 o2 sensor no activity bank 1 sensor 1
P0135 o2 sensor heater circiut malfunction bank 1 sensor 1
now i got a P0308-cylinder 8 misfire deteced
and a P1133-fuel air metering
the guy at advance said the o2 sensor issue cannot cause a misfire. he said it could be a loose plug wire or a bad coil. well i checked all the plug wires they seem tight and im assumign the #8 plug is the on on the passenger side at the back? it seemed secure also.
a week ago my car was running normal and just 2 days ago began to sputter alittle and run rough. it did this before when i had an o2 sensor issue but this is the first time ive gotten a misfire code.
im thinking of just buying new front o2 sensors and buying some o2 extensions with them.
NOTE: i only have the front 02 sensors. my car was tuned and the rear sensor are shut off and have had no issues with them.
can the 02 sensor cause all these problems im seeing now?
these were the original codes
P0134 o2 sensor no activity bank 1 sensor 1
P0135 o2 sensor heater circiut malfunction bank 1 sensor 1
now i got a P0308-cylinder 8 misfire deteced
and a P1133-fuel air metering
the guy at advance said the o2 sensor issue cannot cause a misfire. he said it could be a loose plug wire or a bad coil. well i checked all the plug wires they seem tight and im assumign the #8 plug is the on on the passenger side at the back? it seemed secure also.
a week ago my car was running normal and just 2 days ago began to sputter alittle and run rough. it did this before when i had an o2 sensor issue but this is the first time ive gotten a misfire code.
im thinking of just buying new front o2 sensors and buying some o2 extensions with them.
NOTE: i only have the front 02 sensors. my car was tuned and the rear sensor are shut off and have had no issues with them.
can the 02 sensor cause all these problems im seeing now?
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Unhook both battery terminals and touch them together,
I just unplugged mine again for an hour and my light came on once I started the car up. Might be a sensor issue. I heard if I unplug the 02 sensors themselves and see if the light goes away then I know my problem, that true? Because it came on 50 miles after my header install.
Originally Posted by Ahmadi6490
I just unplugged mine again for an hour and my light came on once I started the car up. Might be a sensor issue. I heard if I unplug the 02 sensors themselves and see if the light goes away then I know my problem, that true? Because it came on 50 miles after my header install.
I got it scanned today, all 4 of my o2s werent functioning right.
P0133
P0134
P0135
P0147
P0154
Im gunna give it another week then i'll replace the front 2. The headers have about 100 miles on them now, they should be getting broken in. For the rear ones ill just get it tuned out since they dont effect my mpg.
P0133
P0134
P0135
P0147
P0154
Im gunna give it another week then i'll replace the front 2. The headers have about 100 miles on them now, they should be getting broken in. For the rear ones ill just get it tuned out since they dont effect my mpg.
