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.
01. Most Common Causes
- Short to power in the air pump control circuit
- Faulty reductant injection air pump
- Damaged wiring or connectors
- Failed PCM (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Increased diesel exhaust fluid consumption
- Reduced engine performance or power
- Failed emissions test
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to retrieve all codes and freeze frame data.
Step 2: Visually inspect the air pump, wiring, and connectors for damage or corrosion.
Step 3: Test the air pump control circuit for shorts to power or ground using a multimeter.
Step 4: Check the air pump resistance and compare to manufacturer specifications.
Step 5: If all else is okay, test the PCM output or replace the PCM as a last resort.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances with this code, as it can cause increased emissions and potential damage to the SCR system. Short trips may be okay, but have it diagnosed promptly.
How much does it cost to fix?▼
The cost typically ranges from $150 to $400, depending on whether the air pump needs replacement or just wiring repairs. Labor and parts vary by vehicle.