Australian Car Repair Issues? Ask an Auto Mechanic for Answers ASAP
Which temperature sensor, outside air temp, or coolant temp?
If it is the outside air temp, does this happen after you wash the car?
Coolant temp sensor failure is rare in VE/WM.
What are your symptoms?
Have to checked the coolant and engine oil levels?
Does the car overheat?
Have you scanned the vehicle, especially the engine ECM for codes/DTCs?
Do you need any further help?
I hope my advice has been of assistance to you.
Please rate my service at your nearest convenience.
I would say you have a faulty thermostat.
They are known for causing coolant temp sensor codes.
You are replacing the coolant temp sensor for no reason, replace the thermostat.
A big job for those who haven't done one though.
And you could also have a coolant loss you don't know about.
I had a VE logging coolant temp sensor codes, and sure enough somebody had pulled the centre out the thermostat.
The PCM logs the code as expected temp versus actual temp.
VE does have porous cylinder heads, generally into the spark plug tubes.
They also have weeping welch plugs from the heads, heads off to fix.
I would fit a factory thermostat, ensure coolant filled correctly and bled, and monitor system performance.
How many kms on this engine now?
OK, sounds promising so far.
Have you got a factory pressure cap?
Are you aware of the fill/bleed procedure for Commodore?
Do you use a coolant fill bleeder device?
Ok, did you have the heater on during the bleed process?
You don't need to have it running for an hour to bleed.
The system is bleed if the heater is blowing hot air, and when the fans come on the coolant will shrink and the level will drop, allowing you to get the full volume in.
If the coolant throws out the filler neck during the next warmup cycle, you could have a head gasket issue.