P2059

Reductant Injection Air Pump Control Circuit/Open

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine Light Is On
Possible reduction in engine power
Increased NOx emissions
The SCR system may turn off
Possible SCR error messages on the instrument panel

Causes

Open or short circuit in the pump control circuit
SCR air pump malfunction
Relay or fuse problems
Engine control unit malfunction
Poor contact in circuit connectors

How to Fix

Check the integrity of the fuses and relays of the SCR system
Check the wiring and connectors of the pump control circuit
Test the resistance and performance of the air pump
Check control signals from the control unit
If necessary, replace the air pump or repair the wiring

Related codes

P2058 P2060 P2061