U0641
Lost Communication With EVAP System Pressure Sensor/Switch Circuit A
U0641 is an OBD-II diagnostic trouble code meaning: Lost Communication With EVAP System Pressure Sensor/Switch Circuit A. Common causes: open or short circuit in the evap pressure sensor circuit, malfunction of the pressure sensor itself. Estimated repair cost: $17–56.
Symptoms
- Check Engine Light Is On
- Increased fuel consumption
- The car goes into emergency mode
- Possible problems starting the engine
- Other EVAP fault codes may appear
Causes
- Open or short circuit in the EVAP pressure sensor circuit
- Malfunction of the pressure sensor itself
- Connector problems or contact corrosion
- ECU malfunction
- Damage to the EVAP system wiring harness
How to Fix
- Check the continuity of the EVAP pressure sensor circuit
- Inspect connectors and contacts for corrosion or damage
- Check the functionality of the pressure sensor
- If necessary, replace the EVAP pressure sensor
- Check the condition of the EVAP system wiring harness
Related codes
Error U0641 by Vehicle Brand
FAQ
What does the U0641 code mean?
U0641 is an OBD-II diagnostic trouble code that indicates: Lost Communication With EVAP System Pressure Sensor/Switch Circuit A
What causes a U0641 error code?
The most common causes of U0641 include: Open or short circuit in the EVAP pressure sensor circuit; Malfunction of the pressure sensor itself; Connector problems or contact corrosion; ECU malfunction.
How do I fix a U0641 diagnostic trouble code?
To fix U0641: Check the continuity of the EVAP pressure sensor circuit. Inspect connectors and contacts for corrosion or damage. Check the functionality of the pressure sensor. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0641?
Yes, but get it checked soon
How much does it cost to fix U0641?
The estimated repair cost for U0641 is $17–56. Actual cost depends on your vehicle, location, and labor rates.
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