U18A2
Lost Communication with Fuel Pump Driver Control Module
U18A2 is an OBD-II diagnostic trouble code meaning: Lost Communication with Fuel Pump Driver Control Module. Common causes: open or short circuit in the communication circuit, malfunction of the fuel pump control module. Estimated repair cost: $56–167.
Symptoms
- Engine won't start
- Floating idle speed
- Loss of power during acceleration
- Check Engine Light Is On
- Fuel pump does not turn on when turning key
Causes
- Open or short circuit in the communication circuit
- Malfunction of the fuel pump control module
- Module power problems
- Poor contact in connectors
- Module software failure
How to Fix
- Check the integrity of wiring and connectors
- Check the power and ground of the control module
- Scan the module for additional errors
- If necessary, replace the fuel pump control module
- Reflash the module (if required)
Related codes
FAQ
What does the U18A2 code mean?
U18A2 is an OBD-II diagnostic trouble code that indicates: Lost Communication with Fuel Pump Driver Control Module
What causes a U18A2 error code?
The most common causes of U18A2 include: Open or short circuit in the communication circuit; Malfunction of the fuel pump control module; Module power problems; Poor contact in connectors.
How do I fix a U18A2 diagnostic trouble code?
To fix U18A2: Check the integrity of wiring and connectors. Check the power and ground of the control module. Scan the module for additional errors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U18A2?
Do not drive — repair immediately
How much does it cost to fix U18A2?
The estimated repair cost for U18A2 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat