Coolant temperature sensor replacement.

[pomiedore vs]

In reply to Aussieforlife11 question, when diagnosing engine management systems, as a rule of thumb, if the problem is intermitent then likely it is a connection or wiring fault.
If the problem is terminal ie, does not go away, then likely it is the sensor. CAS, Coils and DFI modules either work or they don't, there's no in between.
The PCMs use very low voltages so the slightest bit of resistance will cause problems. This is to be expected as cars age and the AC delco wiring looms used on Commodores are particularlly susceptible. The wiper connectors used on the sensor and PCM terminals lose their tension with age. Throw in a bit of corrosion and you can get a dodgey reading.
Before throwing your hard earned money at new sensors, check wiring and connector terminals first. However,the pins on sensor terminals are hard to clean and if they are corroded then replacement is the only option.

 

[BlackVXGTS]

$54 from GMH.

Boy, talk about inflation (or perhaps ripoff) !!! I bought a CTS (part number 92017805) from Patterson Cheney in Vermont, VIC in March 2011. The list price was $12.60.

 

[Brett_jjj]

Boy, talk about inflation (or perhaps ripoff) !!! I bought a CTS (part number 92017805) from Patterson Cheney in Vermont, VIC in March 2011. The list price was $12.60.

The sensor I bought this morning from holden is GMH part number 15326386 or AC Delco part number 213-928.
Id say the sensor you got for $12 is actually the sender unit for the temp gauge, not the actual sensor that the ECU uses, as these engines use 2 different temp sensors, ones for the temp gauge, the others for the ECU.

 

[James39]

In reply to Aussieforlife11 question, when diagnosing engine management systems, as a rule of thumb, if the problem is intermitent then likely it is a connection or wiring fault.
If the problem is terminal ie, does not go away, then likely it is the sensor. CAS, Coils and DFI modules either work or they don't, there's no in between.
The PCMs use very low voltages so the slightest bit of resistance will cause problems. This is to be expected as cars age and the AC delco wiring looms used on Commodores are particularlly susceptible. The wiper connectors used on the sensor and PCM terminals lose their tension with age. Throw in a bit of corrosion and you can get a dodgey reading.
Before throwing your hard earned money at new sensors, check wiring and connector terminals first. However,the pins on sensor terminals are hard to clean and if they are corroded then replacement is the only option.

With the CAS there can be inbtween before it fully stops working.

 

[Brett_jjj]

With the CAS there can be inbtween before it fully stops working.

Yep, I agree. They can cause all sorts of running problems before they die completely.

 

[M1NTVR]

could not having the blower relay in also cause the heater and aircon not to work and just blow out cold air?

The blower is the cabin fan for the heater and A/C.

You need to test resistance from the relay to the fan itself.

 

[aussie4life]

the heater is controlled by a vacuum controlled tap under the bonnet. so no it wouldnt

 

[jas98]

holden wanted 92 bucks for the coolent temperature sensor a few years ago, neither no they only wanted 19 bucks for it the previous year, the guy said that the prices are absolutely stupid, one day it can be like 50 bucks for a part the next day a few hundred


theres a guy on ebay selling coolent temperature sensors for vs-vy commodore for 25 bucks plus 5 bucks postage (triton? brand), got one, works fine no problems at all


also some other brand selling them for like 50ish bucks


yes i know genuine is better, but seriously triton branded sensors are pretty dam good if you ask me

 

[Andreas]

I brought my sensor last week for $54 from holden parts lilydale. All up including replacing some radiator fluid 1/2 hr job and the vehicle has never run better. It would also pay to have all memory cleared from your ECU.

 

[BlackVXGTS]

The sensor I bought this morning from holden is GMH part number 15326386 or AC Delco part number 213-928.
Id say the sensor you got for $12 is actually the sender unit for the temp gauge, not the actual sensor that the ECU uses, as these engines use 2 different temp sensors, ones for the temp gauge, the others for the ECU.

Thanks for your feedback Brett, but I know the difference between a temperature sender and a temperature sensor. I didn't notice in the original post that he had a V6 and not a V8 - I was referring to the price for a V8 CTS. However, I fail to understand how there could be such a huge difference in price. They are very low tech sensors after all. I try not to comment on V6 issues but this one slipped by me !!!