The P2058: Reductant Injection Valve Circuit High Bank 2 Unit 2 refers to a fault where the reductant injection valve circuit in Bank 2, Unit 2 is experiencing higher than normal voltage. This issue may affect the vehicle’s emissions control system and can be caused by high voltage, faulty wiring, or a malfunctioning valve.
P2058 – Quick Overview
| Code | Information |
|---|---|
| Meaning | P2058: Reductant Injection Valve Circuit High Bank 2 Unit 2 |
| Is it serious? | Yes, this can cause the emission control system to malfunction, leading to increased emissions. |
| Possible causes | – High voltage in the valve circuit – Faulty valve or wiring – Connector issues |
| How to diagnose? | – Measure voltage in the valve circuit – Test the valve – Check wiring and connectors |
P2058 Meaning
The P2058 code indicates that the reductant injection valve circuit in Bank 2, Unit 2 is receiving a higher voltage than specified by the manufacturer. This valve is responsible for injecting reductant into the exhaust stream to reduce emissions. When the circuit experiences high voltage, it can cause improper operation of the valve, which may lead to an ineffective emissions control system.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check for any additional fault codes that could provide further details about the issue. | OBD-II Scanner |
| Measure Voltage in the Circuit | Measure the voltage in the reductant injection valve circuit and compare it to the manufacturer’s specifications to confirm if it’s too high. | Multimeter |
| Test the Valve | Use a diagnostic tool to test the valve and ensure it is functioning within the correct voltage range and not being damaged by excessive voltage. | Multimeter, Diagnostic Tool |
| Check Wiring and Connectors | Inspect the wiring and connectors for any signs of damage, corrosion, or loose connections that could cause high voltage in the circuit. | Flashlight, Multimeter |
| Clear the Code and Test Drive | After making repairs, clear the fault code using an OBD-II scanner and take the vehicle for a test drive to verify the issue is resolved. | OBD-II Scanner, Vehicle Owner’s Manual |
| Recheck for Codes | After the test drive, re-scan the vehicle to ensure that the P2058 code does not return. If it reappears, further diagnosis may be needed. | OBD-II Scanner |
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