P2058: Reductant Injection Valve Circuit High Bank 2 Unit 2

Definition

The OBD2 code P2058 indicates a high voltage condition in the reductant injection valve circuit for Bank 2, Unit 2, which is part of the vehicle's emissions control system

Common causes

Faulty reductant injection valve
Wiring issues (short circuit or open circuit)
Poor electrical connections
Failed engine control module (ECM)
Contaminated or degraded reductant fluid
Faulty sensors related to the reductant system
Blocked or restricted exhaust system components

Common misdiagnoses

Faulty reductant injection valve
Wiring issues or short circuits in the circuit
Defective engine control module (ECM)
Faulty sensors related to the reductant system
Issues with the diesel exhaust fluid (DEF) quality or contamination
Problems with the DEF tank or pump
Incorrectly installed or damaged connectors
Software issues or outdated ECM programming

Troubleshooting steps

1. Check for Additional Codes

Before proceeding, check for any other related trouble codes that may provide more context or indicate other issues in the system
2. Inspect Wiring and Connectors
3. Visually inspect the wiring and connectors associated with the reductant injection valve. Look for signs of damage, corrosion, or loose connections
4. Pay special attention to the wiring harness for any fraying, breaks, or shorts
5. Test the Reductant Injection Valve
6. Use a multimeter to measure the resistance of the reductant injection valve. Compare the readings to the manufacturer's specifications
7. If the valve is electrically operated, check for proper operation by applying voltage directly to the valve (if safe to do so) to see if it opens and closes as expected
8. Check the Power and Ground Supply
9. Verify that the reductant injection valve is receiving the correct voltage from the ECM. Use a multimeter to check the voltage at the valve connector
10. Ensure that the ground connection is solid and free of corrosion
11. Inspect the DEF System
12. Check the diesel exhaust fluid (DEF) for contamination or quality issues. Poor quality DEF can cause issues with the SCR system
13. Ensure that the DEF tank is not empty and that the fluid is at the proper level
14. Examine the ECM
15. If all other components check out, there may be an issue with the ECM itself. Check for software updates or reprogramming that may be necessary
16. In some cases, the ECM may need to be replaced if it is determined to be faulty
17. Clear Codes and Test Drive
18. After performing repairs or replacements, clear the trouble codes using an OBD-II scanner
19. Take the vehicle for a test drive to see if the code returns. Monitor the system for proper operation
20. Consult Technical Service Bulletins (TSBs)
21. Check for any TSBs related to the P2058 code for your specific vehicle make and model. Manufacturers may have issued guidance on common issues and fixes
22. Seek Professional Help
23. If you are unable to diagnose or resolve the issue, consider seeking assistance from a qualified mechanic or dealership with experience in diesel engines and SCR systems. By following these steps, you should be able to identify and address the underlying issue causing the P2058 code

Definition

Common causes

Common misdiagnoses

Troubleshooting steps

1. Check for Additional Codes

2. Inspect Wiring and Connectors

3. Visually inspect the wiring and connectors associated with the reductant injection valve. Look for signs of damage, corrosion, or loose connections

4. Pay special attention to the wiring harness for any fraying, breaks, or shorts

5. Test the Reductant Injection Valve

6. Use a multimeter to measure the resistance of the reductant injection valve. Compare the readings to the manufacturer's specifications

7. If the valve is electrically operated, check for proper operation by applying voltage directly to the valve (if safe to do so) to see if it opens and closes as expected

8. Check the Power and Ground Supply

9. Verify that the reductant injection valve is receiving the correct voltage from the ECM. Use a multimeter to check the voltage at the valve connector

10. Ensure that the ground connection is solid and free of corrosion

11. Inspect the DEF System

12. Check the diesel exhaust fluid (DEF) for contamination or quality issues. Poor quality DEF can cause issues with the SCR system

13. Ensure that the DEF tank is not empty and that the fluid is at the proper level

14. Examine the ECM

15. If all other components check out, there may be an issue with the ECM itself. Check for software updates or reprogramming that may be necessary

16. In some cases, the ECM may need to be replaced if it is determined to be faulty

17. Clear Codes and Test Drive

18. After performing repairs or replacements, clear the trouble codes using an OBD-II scanner

19. Take the vehicle for a test drive to see if the code returns. Monitor the system for proper operation

20. Consult Technical Service Bulletins (TSBs)

21. Check for any TSBs related to the P2058 code for your specific vehicle make and model. Manufacturers may have issued guidance on common issues and fixes

22. Seek Professional Help

23. If you are unable to diagnose or resolve the issue, consider seeking assistance from a qualified mechanic or dealership with experience in diesel engines and SCR systems. By following these steps, you should be able to identify and address the underlying issue causing the P2058 code