Reductant Injection Air Pump Control Circuit Low
P2060 indicates the reductant injection air pump control circuit is receiving a low voltage signal, preventing proper operation of the selective catalytic reduction (SCR) system. This code typically appears in diesel vehicles and can lead to catalyst damage if not addressed promptly.
What You Might Notice
- Reduced fuel efficiency
- Excessive black smoke from exhaust
- Diminished engine performance
- Check Engine Light illuminated
- Other SCR-related codes present
Most Common Causes
- 1
Defective reductant air pressure sensor
The pressure sensor monitoring the reductant pump may be failing or sending incorrect low voltage signals to the engine control module.
- 2
Faulty reductant injection air pump
The pump itself may be failing or not receiving adequate electrical power to operate the SCR system properly.
- 3
Wiring or connector issues
Corroded, damaged, or loose connections in the pump control circuit can cause low voltage conditions at the module.
- 4
Engine control module (ECM) malfunction
A faulty ECM may be unable to properly control the pump circuit or may be misinterpreting sensor signals.
How to Diagnose It
- 1
Check Defective reductant air pressure sensor — The pressure sensor monitoring the reductant pump may be failing or sending incorrect low voltage signals to the engine control module.
- 2
Check Faulty reductant injection air pump — The pump itself may be failing or not receiving adequate electrical power to operate the SCR system properly.
- 3
Check Wiring or connector issues — Corroded, damaged, or loose connections in the pump control circuit can cause low voltage conditions at the module.
- 4
Check Engine control module (ECM) malfunction — A faulty ECM may be unable to properly control the pump circuit or may be misinterpreting sensor signals.
How to Fix It
- 1
Test and replace reductant air pressure sensor
Use a multimeter to verify the sensor is outputting correct voltage readings. If readings are low or erratic, replace the pressure sensor.
- 2
Inspect and repair pump control wiring
Visually inspect all wiring and connectors related to the pump for corrosion, damage, or loose connections. Clean connectors or replace damaged wiring as needed.
- 3
Test and replace reductant injection air pump
If wiring and sensor are good, perform voltage testing at the pump motor. If pump is not receiving power or is not responding, replace the pump assembly.
- 4
Reprogram or replace ECM
If all components test good, the issue may be a faulty ECM. Consult your vehicle's service manual for reprogramming procedures or replace the module if necessary.
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