Reductant Injection Air Pump Control Circuit High
The P2061 code indicates that the powertrain control module (PCM) has detected a high voltage condition in the control circuit of the reductant injection air pump. This pump is part of the selective catalytic reduction (SCR) system, which injects diesel exhaust fluid (DEF) into the exhaust stream to reduce NOx emissions. A high voltage signal suggests a short to power, a faulty pump, or a wiring issue. This can lead to improper DEF injection, increased emissions, and potential damage to the SCR system.
1. Most Common Causes
- Short to voltage in the reductant injection air pump control circuit wiring
- Corroded, loose, or damaged connector or terminal in the pump circuit
- Internal failure of the reductant injection air pump module/actuator
- Excessive resistance in the pump module ground circuit
- Faulty engine control module (ECM) in the circuit control section
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine performance or power
- Increased diesel exhaust fluid consumption
- Failed emissions test
3. Step-by-Step Diagnosis
Step 1: Use a scan tool to retrieve all stored codes and freeze frame data.
Step 2: Inspect the wiring and connectors for damage, corrosion, or shorts.
Step 3: Test the air pump control circuit voltage with a multimeter to confirm high voltage.
Step 4: Check the air pump resistance and operation; replace if faulty.
Step 5: Clear codes and test drive to verify repair.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as it can cause increased emissions and potential damage to the SCR system. Short trips to a repair shop are acceptable.
How much does it cost to fix?▼
The cost typically ranges from $150 to $400, including parts and labor, depending on the root cause and vehicle make.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.