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P code powertrain High severity

P2061 Reductant Injection Air Pump Control Circuit High

The OBD2 code P2061 indicates a high voltage condition in the reductant injection air pump control circuit, which is part of the vehicle's emissions control system

Definition

The OBD2 code P2061 indicates a high voltage condition in the reductant injection air pump control circuit, which is part of the vehicle's emissions control system

Common causes

  • Faulty reductant injection air pump
  • Open or shorted wiring in the control circuit
  • Corroded or damaged connectors
  • Failed control module
  • Faulty relay or fuse
  • Vacuum leaks in the system
  • Software issues in the engine control unit (ECU)

Common misdiagnoses

  • Faulty reductant injection air pump
  • Wiring issues or short circuits
  • Faulty engine control module (ECM)
  • Defective sensors (e.g., pressure or temperature sensors)
  • Blocked or damaged exhaust system components
  • Incorrectly installed or damaged reductant system components
  • Fuel system issues
  • Vacuum leaks in the intake system

Troubleshooting steps

  1. 1. Check for Additional Codes

    Use an OBD-II scanner to check for any other related trouble codes. This can provide more context and help identify if there are multiple issues

  2. 2. Inspect the Reductant Injection Air Pump

    Visual Inspection: Check the air pump for any visible damage, corrosion, or loose connections

  3. 3. Functionality Test

    If possible, test the pump to ensure it operates correctly. You may need to apply power directly to the pump to see if it runs

  4. 4. Examine Wiring and Connectors

    Wiring Inspection: Look for damaged, frayed, or shorted wires in the circuit. Pay special attention to areas where the wiring may be exposed to heat or abrasion

  5. 5. Connector Check

    Ensure that all connectors are secure and free of corrosion. Clean any corroded terminals and ensure a good connection

  6. 6. Test the Control Circuit

    Use a multimeter to check the voltage and ground at the pump connector. Compare your readings to the specifications in the vehicle’s service manual

  7. 7. Check for continuity in the wiring between the pump and the engine control module (ECM)

  8. 8. Inspect the ECM

    If the wiring and pump are functioning correctly, the issue may lie with the ECM. Check for any software updates or recalls related to the ECM

  9. 9. If necessary, perform a reset of the ECM by disconnecting the battery for a few minutes

  10. 10. Check for Blockages

    Inspect the air intake and exhaust paths of the reductant injection system for any blockages that could affect performance

  11. 11. Test the Reductant Fluid Quality

    Ensure that the diesel exhaust fluid (DEF) is of good quality and not contaminated. Poor quality DEF can cause issues with the reductant system

  12. 12. Consult Technical Service Bulletins (TSBs)

    Look for any TSBs related to the P2061 code for your specific vehicle make and model. Manufacturers may have specific fixes or recommendations

  13. 13. Clear Codes and Test Drive

    After performing repairs or adjustments, clear the codes and take the vehicle for a test drive to see if the code returns

  14. 14. Seek Professional Help

    If the issue persists after following these steps, it may be best to consult a professional mechanic or dealership for further diagnosis. By following these troubleshooting steps, you should be able to identify and resolve the issue associated with the P2061 code. Always refer to the vehicle's service manual for specific procedures and specifications