flashing check engine soon light
10-23-2010, 11:45 AM
#1
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flashing check engine soon light so i just got done with the head swap and now the camaro has a bug...first of all it popped 3 codes, P0102, P0200, and P0645.
P0102 is a low MAF signal input...plug wasn't in all the way. P0645 is A/C clutch relay malfunction...didn't have this plugged in at all. and finally P0200 which is injector harness malfunction which comes down to a bad ECM/PCM, failing injector or an open/shorted wire harness. so i cleared all the codes and now the check engine light is flashing and the scanner isn't detecting any codes being popped. along with i have an ABS INOP, and an ASR OFF light on, and none of those things are disconnected nor did i disconnect them or have these light on b4 the car got taken apart. i think i am missing a ground wire somewhere. when i was hooking everything back up after the install i had 3 ground wires the i bolted the back of the head. am i maybe missing a ground that may also be tied into the wiring for the ABS and Traction control?? please any advice is appreciated.
P0102 is a low MAF signal input...plug wasn't in all the way. P0645 is A/C clutch relay malfunction...didn't have this plugged in at all. and finally P0200 which is injector harness malfunction which comes down to a bad ECM/PCM, failing injector or an open/shorted wire harness. so i cleared all the codes and now the check engine light is flashing and the scanner isn't detecting any codes being popped. along with i have an ABS INOP, and an ASR OFF light on, and none of those things are disconnected nor did i disconnect them or have these light on b4 the car got taken apart. i think i am missing a ground wire somewhere. when i was hooking everything back up after the install i had 3 ground wires the i bolted the back of the head. am i maybe missing a ground that may also be tied into the wiring for the ABS and Traction control?? please any advice is appreciated.
10-23-2010, 01:30 PM
#2
Check the PCM-to-engine ground wire that "I THINK" normally attaches to the back of the passengers side head. Its about 10-12 inches from the PCM in the wire bundle. 4 small wires go into one thick wire, then that wire goes to the passengers side head. Or to make it easy, just snip that one single thick wire and splice a new wire into it like I did and rebolt it to something on the block/head,etc.......
That wire came loose on mine and I had all that **** going on.
If thats it.....its a very easy 15 minute fix.....
.
That wire came loose on mine and I had all that **** going on.
If thats it.....its a very easy 15 minute fix.....
.
Last edited by LS6427; 10-23-2010 at 03:34 PM.
10-24-2010, 09:17 AM
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i don't have a ground on the passenger side, all i have is 3 ground wires that are attacted to the drivers side head that come out of the bundle for the fuel injectors on the drivers side...i'l take a pic to show u.
10-24-2010, 09:29 AM
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here is the pic of the drivers side head and the 3 grounds. but my question is if it is the PCM ground then how would the car run if the computer can't make the complete circuit? does anyone know how many grounds there are on a 2001 car?
10-24-2010, 11:02 AM
#5
Mine is a 98', maybe your 01 only has the 3 wires. Check them all real good all the way to the PCM to make sure nothing is frayed and touching/shorting with another wire in the bundle.
I would also pop the two tops off the PCM and check to see if all the pins in all 4 rows are perfect.....nothing burnt or discolored. When my ground wire came loose it fried part of my PCM and a few pins were burnt black. I had to replace my PCM along with fixing that loose ground wire.
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10-28-2010, 04:48 PM
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well looked some stuff over and nothing seems to be out of the ordinary. talked with one of the mechanics i work with at firestone and he said the flashing check engine light is a class B misfire, so he said it has to be something like a coil, spark plug, or a plug wire. but i just replaced the plugs and wires right b4 the damn car blew up.
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10-28-2010, 10:31 PM
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blew up? A flashing check engine light usually means there is some serious misfireing going on... are you sure the car was running fine??? Im positive a flashing check engine light means you are doing damage, and are on your way to frying out your catalytic converter. the mechanics are thinking of ignition parts, plugs wires coils, because 99out of 100 misfires are ignition related, not fuel. but considering your injector code, You may more likely have a bad injector, wire harness, or clogged injector. Also the aftermarket MAF doesnt help either.
10-28-2010, 10:54 PM
#9
well looked some stuff over and nothing seems to be out of the ordinary. talked with one of the mechanics i work with at firestone and he said the flashing check engine light is a class B misfire, so he said it has to be something like a coil, spark plug, or a plug wire. but i just replaced the plugs and wires right b4 the damn car blew up.
And what do you mean it blew up???? When? What kind of "blew up"?
I still say you have a loose ground wire.......
.
10-30-2010, 02:42 AM
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blew up? A flashing check engine light usually means there is some serious misfireing going on... are you sure the car was running fine??? Im positive a flashing check engine light means you are doing damage, and are on your way to frying out your catalytic converter. the mechanics are thinking of ignition parts, plugs wires coils, because 99out of 100 misfires are ignition related, not fuel. but considering your injector code, You may more likely have a bad injector, wire harness, or clogged injector. Also the aftermarket MAF doesnt help either.
No offense to your mechanic, but he hasen't a clue. Flashing SES light means, "multiple" misfires detected and tells somewhat of a story in itself. AND...alot of other things besides coil, spark plug, or a plug wire, will cause it. If it were only that simple.
And what do you mean it blew up???? When? What kind of "blew up"?
I still say you have a loose ground wire.......
.
And what do you mean it blew up???? When? What kind of "blew up"?
I still say you have a loose ground wire.......
.
just double checked all grounds the other day, all are accounted for and are tight. all fuses are good and undamaged. called the guy who did the tune originally for the guy who had the car b4 me and he said the flashing light was spark related and that i need to check all plugs, and wires and drive the car to see if the ABS and ASR light go out. still need to check plugs
10-30-2010, 03:05 AM
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Check all the coilpack main harnesses and make sure the plug wires are click in all the way. Check each and every plug in the harness. Take off the battery cable and wait a few minutes and then check for codes again. If its flashing... its misfiring
10-30-2010, 12:22 PM
#12
when i said blew up i ment it broke 3 valve springs on the drivers side 241 head and thats why i just bought 243's and basicly upgraded the whole top end of the motor.
just double checked all grounds the other day, all are accounted for and are tight. all fuses are good and undamaged. called the guy who did the tune originally for the guy who had the car b4 me and he said the flashing light was spark related and that i need to check all plugs, and wires and drive the car to see if the ABS and ASR light go out. still need to check plugs
just double checked all grounds the other day, all are accounted for and are tight. all fuses are good and undamaged. called the guy who did the tune originally for the guy who had the car b4 me and he said the flashing light was spark related and that i need to check all plugs, and wires and drive the car to see if the ABS and ASR light go out. still need to check plugs
When you check the plugs, its cracks in the ceramic you need to look for. If you're taking them out....just replace the bastards while you're at it...that job sucks to do.
I would also get all new wires. $36.00 at Advance Auto. Its what I've had on my 427ci for years and years, they are excellent.
.
11-01-2010, 05:38 PM
#14
You just got done doing the head swap right? You didn't get anything in 1 of the cylinders with the head off did you? Are your injector clips locked onto the injector? Check all the plug wires for fully snapped onto the coils and plugs. What cylinders are actually misfiring? I know I had a bad ground on mine before and the abs and tcs lights stayed on. And you said on FAST somewhere you had a plug leftover with nothing to plug into it? Thats wrong lol
11-01-2010, 11:49 PM
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im having similar issues.
ses light flashes
tps sensor voltage code is on
reads 5 volts with multimeter and ignition on, voltage reads lower when turn car on.
map sensor voltage code is on
ac clutch relay code on
i just re did the ground from the driver side bottom block area to the chassis .
same issues. ill check the ground from the head.
ses light flashes
tps sensor voltage code is on
reads 5 volts with multimeter and ignition on, voltage reads lower when turn car on.
map sensor voltage code is on
ac clutch relay code on
i just re did the ground from the driver side bottom block area to the chassis .
same issues. ill check the ground from the head.
11-09-2010, 01:06 PM
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You just got done doing the head swap right? You didn't get anything in 1 of the cylinders with the head off did you? Are your injector clips locked onto the injector? Check all the plug wires for fully snapped onto the coils and plugs. What cylinders are actually misfiring? I know I had a bad ground on mine before and the abs and tcs lights stayed on. And you said on FAST somewhere you had a plug leftover with nothing to plug into it? Thats wrong lol
no on anything in cylinders (vaccumed them out with shop vac)
yes i head audiable "click" on each injector clip
yes on double click for plug wire to coil, and single click on plug
when i erased the P0200 code thats when i got the flashing check engine light, and i tried to pull codes again but nothing is failing, just the flashing SES light.
how did you fix the bad ground on your car?
and yes there is a yellow 2 wire connector i have no idea what it goes to on the driver side behind the connector for the coil packs, but i have no extra parts....car is a 01 Z. if anyone has an 01 or 02 car and has a pic i'd like to see it for refrence. i have buddies that have 98, 99, and 00 cars and neither of them have this plug.
