P20D3

Exhaust Aftertreatment Fuel Injector B Control Circuit Low

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$33–167 (est.)

Symptoms

Check Engine light comes on
Reduced engine power
Increased fuel consumption
Unstable engine operation
Increased emissions

Causes

Malfunction of injector B of the exhaust gas purification system
Open or short circuit in control circuit
Wiring Harness Problems
Malfunction of the control unit (ECU)
Poor contact in connectors

How to Fix

Check the continuity of the injector B control circuit
Check resistance and operation of injector B
Inspect the wiring harness for damage
Check contacts in connectors
If necessary, replace the injector or repair the chain

Related codes

P20D1 P20D2 P20D4