U0604
Lost Communication With Fuel Pressure Sensor B
U0604 is an OBD-II diagnostic trouble code meaning: Lost Communication With Fuel Pressure Sensor B. Common causes: open or short circuit in the sensor circuit, fuel pressure sensor b malfunction. Estimated repair cost: $28–94.
Symptoms
- Check Engine light comes on
- Reduced engine power
- Unstable engine operation at idle
- Increased fuel consumption
- Possible problems starting the engine
Causes
- Open or short circuit in the sensor circuit
- Fuel pressure sensor B malfunction
- Bad contacts in connectors
- Problems with the engine ECU
- Corrosion or oxidation of contacts
How to Fix
- Check the integrity of the wires to the sensor
- Check sensor connectors for corrosion
- Measure resistance and voltage at the sensor
- If necessary, replace fuel pressure sensor B
- Check the condition of the computer
Related codes
Error U0604 by Vehicle Brand
FAQ
What does the U0604 code mean?
U0604 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Fuel Pressure Sensor B
What causes a U0604 error code?
The most common causes of U0604 include: Open or short circuit in the sensor circuit; Fuel pressure sensor B malfunction; Bad contacts in connectors; Problems with the engine ECU.
How do I fix a U0604 diagnostic trouble code?
To fix U0604: Check the integrity of the wires to the sensor. Check sensor connectors for corrosion. Measure resistance and voltage at the sensor. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0604?
Yes, but get it checked soon
How much does it cost to fix U0604?
The estimated repair cost for U0604 is $28–94. Actual cost depends on your vehicle, location, and labor rates.
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