What is the diagnostic code for sensor reference voltage a circuit low?
What is the diagnostic code for sensor reference voltage a circuit low?
P0642 is a diagnostic trouble code (DTC) for “Sensor Reference Voltage “A” Circuit Low”. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation.
How does a 5 volt reference circuit work?
Each reference bus provides 5-volt reference circuits for more than one sensor. Therefore, a fault condition on one 5-volt reference circuit will affect the other 5-volt reference circuits connected to that reference bus. The ECM monitors the voltage on the 5-volt reference busses.
Why is my accelerator pedal not registering 5 volts?
If your multimeter still does not register 5 Volts in this circuit, then you’ve found the cause of the Accelerator Pedal Position (APP) Sensor 1 diagnostic trouble code (DTC). Repair the issue causing these missing 5 Volts, since without power APP Sensor 1 won’t function.
What does the sensor reference voltage code p0642 mean?
The P0642 code indicates that the sensor reference voltage “A” circuit is too low compared to the manufacturer’s specifications, as detected by the powertrain control module, or PCM.
Each reference bus provides 5-volt reference circuits for more than one sensor. Therefore, a fault condition on one 5-volt reference circuit will affect the other 5-volt reference circuits connected to that reference bus. The ECM monitors the voltage on the 5-volt reference busses.
P0642 is a diagnostic trouble code (DTC) for “Sensor Reference Voltage “A” Circuit Low”. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation.
What is the ECM code for app sensor 2?
Criteria: The ECM detects that the APP sensor 2 voltage is less than 0.325 volt for more than 0.4 second. Code definition: P2138- Accelerator Pedal Position (APP) Sensor 2 Circuit Low Voltage
If your multimeter still does not register 5 Volts in this circuit, then you’ve found the cause of the Accelerator Pedal Position (APP) Sensor 1 diagnostic trouble code (DTC). Repair the issue causing these missing 5 Volts, since without power APP Sensor 1 won’t function.
