nahr123
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- Sep 23, 2011
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Hi guys, I would like to hear some opinions on this issue. I suspect a bad PCM.
I have been working on the car lately and for the past few months I have been dealing with numerous CEL codes. It all sorta happen one after the other, leaving me to believe its the PCM.
As you can see in the pic it's throwing following codes: C0500 P0103 C0503 CC0900 P0203. Some codes stay some go and come back again. Sometimes it changes from current fault to pending faults. Other then that the car seems to run fine. It seems to pull good too.
Been trying to sort these issues out with no luck. I changed MAf sensor + connector, replaced alternator, new bigger battery + new head unit (had to change it due to stock radio draining battery), cleaned all 8 fuel injectors, swapped injectors, swapped coils, swapped front wheel speed sensor, replaced abs module, checked conncetions to ABS & PCM no corrotions, Checked SJB no water leakage no corrotion.
With the OBD scanner I was reading between 13.0 and 13.8 volt. Had a corroded terminal wire coming from the alternator. Replaced it and now it reads 13.8 to 14.4 volts so I know the new alternator is good.
This indicates it certainly is the PCM acting up. What's yall opinion on this? Advice?
I'm pretty good with soldering so maybe I can re-solder the joints see if it will fix things before replacing the PCM?
Every input is appreciated, thanks.



I have been working on the car lately and for the past few months I have been dealing with numerous CEL codes. It all sorta happen one after the other, leaving me to believe its the PCM.
As you can see in the pic it's throwing following codes: C0500 P0103 C0503 CC0900 P0203. Some codes stay some go and come back again. Sometimes it changes from current fault to pending faults. Other then that the car seems to run fine. It seems to pull good too.
Been trying to sort these issues out with no luck. I changed MAf sensor + connector, replaced alternator, new bigger battery + new head unit (had to change it due to stock radio draining battery), cleaned all 8 fuel injectors, swapped injectors, swapped coils, swapped front wheel speed sensor, replaced abs module, checked conncetions to ABS & PCM no corrotions, Checked SJB no water leakage no corrotion.
With the OBD scanner I was reading between 13.0 and 13.8 volt. Had a corroded terminal wire coming from the alternator. Replaced it and now it reads 13.8 to 14.4 volts so I know the new alternator is good.
This indicates it certainly is the PCM acting up. What's yall opinion on this? Advice?
I'm pretty good with soldering so maybe I can re-solder the joints see if it will fix things before replacing the PCM?
Every input is appreciated, thanks.


