P2456

Particulate Filter Pressure Sensor A Circuit Intermittent/Erratic

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$33–89 (est.)

Symptoms

Check Engine Light Is On
Reduced engine power
Increased fuel consumption
Problems with diesel particulate filter regeneration
Unstable engine idling

Causes

Open or short circuit in the sensor circuit
Poor contact in the sensor connector
DPF pressure sensor malfunction
Wiring harness damage
Problems with the engine control unit

How to Fix

Check the integrity of the sensor circuit
Inspect connectors and contacts for corrosion
Check sensor resistance and reference voltage
Replace pressure sensor if necessary
Test the operation of the system after repair

Related codes

P2454 P2455 P2457