U01B1

Lost Communication With Particulate Matter Sensor B

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
Increased fuel consumption
Inability to perform DPF regeneration
Error message on the dashboard

Causes

Open or short circuit in the sensor circuit
Particle sensor malfunction
Problems with the sensor connector
Engine control unit malfunction
Corroded contacts or damaged wiring harness

How to Fix

Check the integrity of the wiring to the sensor
Inspect the sensor connector for damage
Check the power supply and ground of the sensor
Test the particle sensor (replace if necessary)
Reset the error and check for its reappearance

Related codes

U01B0 U01B2 P2463