U0655

Lost Communication With Diesel Intake Air Flow B Position Sensor

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$33–167 (est.)

Symptoms

Reduced engine power
Increased fuel consumption
Rough idling
Check Engine Light Is On
Switching to emergency mode

Causes

Open or short circuit in the sensor circuit
Air Flow Sensor B Malfunction
Problems with the sensor connector
Engine control module (ECU) malfunction
Wiring harness damage

How to Fix

Check the integrity of the sensor wires and connectors
Check the voltage and resistance of the sensor according to the specification
Replace faulty air flow sensor B
Check and replace wiring harness if necessary
If there are no results, perform ECU diagnostics

Related codes

U0656 U0654 P0100 P0101