P24B4

Particulate Matter Sensor Heater Control Circuit Range/Performance

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
Problems with diesel particulate filter regeneration
Unstable engine idling

Causes

Open or short circuit in the heater circuit
Particulate filter sensor malfunction
Problems with the heating circuit relay or fuse
Engine ECU malfunction
Oxidation of contacts in circuit connectors

How to Fix

Check the integrity of the heater circuit
Check the resistance of the heating element
Inspect connectors and contacts for corrosion
Check circuit fuses and relays
If necessary, replace the diesel particulate filter sensor

Related codes

P24B5 P24B6 P24B7