What does the powertrain control module code p0642 mean?
P0642: Code P0642 indicates the powertrain control module (PCM) has detected a low reference voltage for the sensor ‘A’ circuit. This typically indicates a short circuit. P0643: Code P0643 indicates the powertrain control module (PCM) has detected a high reference voltage for the sensor ‘A’ circuit.
Why is the p0641 Chevrolet 5 volt reference voltage incorrect?
Therefore, a fault condition on one 5-volt reference circuit will affect the other 5-volt reference circuits connected to the reference bus. The control module monitors the voltage on the 5-volt reference buses. Need more information on how to fix the P0641 CHEVROLET code?
What are the common causes of code p0641?
While this is a common cause of open circuits that can set code P0641, it must be noted that in many cases, the cause of the open circuit might be buried deep in a wiring harness, where it might never be found unless the entire harness is removed and inspected/tested. What are the common causes of code P0641 ?
How much does it cost to diagnose the p0641 Chevrolet code?
The cost of diagnosing the P0641 CHEVROLET code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour. When is the P0641 CHEVROLET code detected?
P0642: Code P0642 indicates the powertrain control module (PCM) has detected a low reference voltage for the sensor ‘A’ circuit. This typically indicates a short circuit. P0643: Code P0643 indicates the powertrain control module (PCM) has detected a high reference voltage for the sensor ‘A’ circuit.
What to do if your Chevy has a p0641 code?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins. The cost of diagnosing the P0641 CHEVROLET code is 1.0 hour of labor.
Why is my p0641 sensor stored alone?
If the P0641 is stored alone, suspect that a PCM programming error has occurred. Obviously, you will need to diagnose and repair any other sensor codes prior to diagnosing and repairing the P0641 – but keep the open “A” circuit in mind.
What is the 5 volt reference voltage on a trailblazer?
The ECM has detected the sensor 5 volt reference circuit voltage is higher or lower than expected Read more: http://engine-codes.com/p06… 2006 trailblazer ext, codes po60e,p2135,p2138,po641.