Guys,

Got a fault code which comes out as C1A00 - ECU Internal Failure. Circuit Voltage below threshold

Any ideas?

Just replaced my battery which was flat so could just be that and wants clearing...

By the way accidentally pressed the TPMS option on the Hawkeye whilst driving and the dash lit up like a disco with multiple fault codes which was easily cleared, but what the hell is it for? I'm running version 7 update

Cheers

Which module? And what issues are you having?

I think it was the parking module as the issue I've got is with the parking sensors not working, just trying to determine if its the loom or not

Cheers

That code is stored when the sensors have failed internally. Need to unplug them one by one, front and rear until the code disappears, and comes up with a fault for a sensor

Of course, there may be an actual PDC ECU fault, so don't discount it

Are you suggesting a process of elimination directed at the sensors? I believe the pdc had already been swapped out to check (long story)

Right here's the deal folks; replaced the front & rear sensors and the looms as the rear was corroded, but the parking warning light still flashes and sounds a warning for 3 secs, I've plugged my hawkeye in and it's still showing the same fault code for front & rear: B1B57 Power circuit earth to ground, but won't clear the faults/ DTC's, is there a reset I need to do instead?

Cheers

problem fixed, ordered a used PDC Module from America £45 Inc postage

Only difference was the part number, I got a YWC500550 and what I removed was a YWC500313

I don't know what the difference is but I read that it should be YWC500550

Anyway a cheap fix, but bear in mind I also replaced a corroded loom and sensors first

Cheers