U04A4

Invalid Data Received From Particulate Matter Sensor A

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine Light Is On
Reduced engine power
Problems with DPF regeneration
Increased fuel consumption
Possible errors in the exhaust gas purification system

Causes

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

How to Fix

Check the condition of the particle sensor
Check the integrity of the circuit and connectors
Clean contacts from corrosion
Check sensor resistance
Replace the particle sensor if necessary

Related codes

U04A5 U04A3 P2463