U0604

Lost Communication With Fuel Pressure Sensor B

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–94 (est.)

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

U0603 U0605 U0606