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Gary
Gary, Australia Car Mechanic
Category: Australia Car
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Experience:  Senior Technician
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I have a 2011 thunder ute all of the sudden i have engine

Customer Question

i have a 2011 thunder ute all of the sudden i have engine warning light on and it running rough
they have now replace all 6 sparks plugs and all 6 ingition coils reconnect diagnostic machine clear/reset adaption values
two weeks later warning lights running rough again
Submitted: 4 months ago.
Category: Australia Car
Expert:  Gary replied 4 months ago.

Hi Craig,

I know Commodore very well.

What codes are set in the PCM after this rough running occurs?

You have paid for 6 spark plugs, and 6 coils?

Your workshop is just guessing?

Gary

Customer: replied 4 months ago.
thanks for getting back to me Gary
Sorry PCM would i have to find that off them at the workshop
Expert:  Gary replied 4 months ago.

Hi Craig,

The PCM is the Powertrain Control Module (engine computer).

Hopefully your workshop scanned the PCM for codes prior to any repairs.

Of course, it might be or might might not be the same fault.

So if can find the first codes, and maybe after contacting them, they may want to scan it again.

Come back to me when you get some more info.

Gary

Expert:  Gary replied 4 months ago.

Hi Craig,

Do you need any further help?

I hope my advice has been of assistance to you.

Kind regards

Gary

Customer: replied 4 months ago.
they took the car again on friday hooked it up
troble codes list
c0800-03 not present control module power circuit
voltage below tresholdso they are saying that was the problem with my car and the cause of the trouble
Expert:  Gary replied 4 months ago.

Hi Craig,

What did THEY do for that code?

C0800 is a low voltage code in the ABS module, can happen from low voltage while starting the engine.

I have seen a corroded battery harness connector near the battery, ONLY in a UTE.

How is the car running now?

Gary

Customer: replied 4 months ago.
replaced the battery it seems to be running ok atm
but i can not understand why that would cause the engine light to come on the run bad
Expert:  Gary replied 4 months ago.

Hi Craig,

Fairly typical these days, batteries are a common cause for issues during or after startup.

Some cars won't start at all if the battery falls below 10 volts.

VE V6 are better, but early 9s are about the limit.

Hope you are all good now.

Gary

Customer: replied 4 months ago.
thank you for all your help
Expert:  Gary replied 4 months ago.

You are welcome Craig.

I hope my advice has been of assistance to you.

Have a good day.

Gary

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