Power Control Module

Asked by Khowewerner May 09, 2023 at 01:43 PM about the 2006 Mazda Tribute

Question type: Maintenance & Repair

I took my car in for a check engine light. The shop diagnosed a valve temperature control sensor and pigtail was faulty. They order the parts and put in a new pigtail and noticed that connector was wired differently than the one in my car. So they said they needed to get the parts from Mazda and that it would take a few days to get it so I took the car home. On the way home I noticed a electrical smell in the car and the temperature gauge wasn't working  and neither was the AC. I had just commented to my spouse that the AC was working great the day before taking it to the shop. The shop told me that the AC had nothing to do with what the did to the car. They replaced the pigtail and sensor and ALL of the mechanical parts for the AC. It still didn't work. Traced it to pin 15 on the power control module and that it had to go to the Mazda dealership to be fixed that they couldn't do it there. Now the heater, fan, defrosters etc do not work. My question is: could they have fried the power control module by installing the valve temperature sensor pigtail with the wrong wiring have fried the power control module? Please help. I have already spent over $3000 with this shop in the last month!

1 Answer
157,615

James answered about a year ago

Sounds like they replaced the coolant temperature sensor with either the wrong part or an updated version of the original part. Then tried to make it work by using a pigtail which was the wrong one too! Rockauto.com shows a sensor and pigtail sold together. So I'm suspecting there's been a design change. This would absolutely effect the air conditioning. If the PCM (Powertrain Control Module) loses the signal from the coolant temperature sensor it assumes the engine is overheating and takes action to avoid engine damage. One thing that happens is the air conditioning is disabled because it increases the heat load on the cooling system. In short, the so called shop you went to messed up big time! Sorry! Jim

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