U0654

Lost Communication With Diesel Intake Air Flow A Position Sensor

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$28–89 (est.)

Symptoms

Check Engine light comes on
Reduced engine power
Unstable engine idling
Increased fuel consumption
Problems starting the engine

Causes

Open or short circuit in the sensor circuit
Air flow position sensor A fault
Poor contact in the sensor connector
Wiring harness damage
Engine control unit (ECU) malfunction

How to Fix

Check the integrity of the sensor circuit
Inspect the sensor connector for damage
Check sensor resistance
Scan the control unit for other errors
Replace air flow position sensor A if necessary

Related codes

U0653 U0655 U0656