U0603
Lost Communication With Fuel Pressure Sensor A
U0603 is an OBD-II diagnostic trouble code meaning: Lost Communication With Fuel Pressure Sensor A. Common causes: fuel pressure sensor a fault, open or short circuit in sensor wiring. Estimated repair cost: $28–167.
Symptoms
- The Check Engine light comes on
- The engine may run rough
- Reduced engine power
- Difficulty starting the engine
- Possible increase in fuel consumption
Causes
- Fuel pressure sensor A fault
- Open or short circuit in sensor wiring
- Poor connection in sensor or ECU connectors
- ECU malfunction
- Problems with the CAN data bus
How to Fix
- Check the wiring and connectors of the fuel pressure sensor A for damage.
- Check fuel pressure sensor A using a multimeter
- Check the integrity of the CAN data bus
- Check the ECU for damage or corrosion
- Replace faulty components (sensor, wiring, ECU)
Related codes
Error U0603 by Vehicle Brand
FAQ
What does the U0603 code mean?
U0603 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Fuel Pressure Sensor A
What causes a U0603 error code?
The most common causes of U0603 include: Fuel pressure sensor A fault; Open or short circuit in sensor wiring; Poor connection in sensor or ECU connectors; ECU malfunction.
How do I fix a U0603 diagnostic trouble code?
To fix U0603: Check the wiring and connectors of the fuel pressure sensor A for damage.. Check fuel pressure sensor A using a multimeter. Check the integrity of the CAN data bus. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0603?
Yes, but get it checked soon
How much does it cost to fix U0603?
The estimated repair cost for U0603 is $28–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat