P0641
Sensor Reference Voltage A Circuit Open
System: ECU
Severity: medium
What does P0641 mean?
The DTC P0641 (Sensor Reference Voltage A Circuit Open) is a fault code stored by the ECU when it detects a 5V ref open condition in the ecu subsystem. It is commonly seen on European and Asian vehicles using Bosch, Continental, Siemens or Denso ECUs.
Common causes of P0641
- Short circuit on a 5V sensor
- ECU internal fault
How to fix P0641
Disconnect sensors one by one to find short.
Tuning approach with DaVinci Deluxe
For P0641, DaVinci Deluxe offers the following ECU map adjustments and software solutions:
- (repair required)
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