Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with the part of the car that helps reduce pollution. It's like a valve that isn't working right on one side of the car.
The P2058 code indicates that the Engine Control Module (ECM) has detected a high voltage condition in the reductant injection valve circuit for Bank 2, Unit 2.
The reductant injection system is part of the vehicle's emissions control system, which helps reduce nitrogen oxide emissions. The system injects a urea-based fluid (DEF) into the exhaust stream. The P2058 code is triggered when the ECM detects a higher than expected voltage in the circuit controlling the reductant injection valve for Bank 2, Unit 2. This could indicate a wiring issue, a faulty valve, or a problem with the ECM itself.
• Check Engine Light is on
• Reduced engine performance
• Increased emissions
• Faulty reductant injection valve
• Open or shorted wiring in the reductant injection valve circuit
• Faulty ECM
ECM: Engine Control Module, the computer that controls engine functions.
DEF: Diesel Exhaust Fluid, used to reduce emissions in diesel vehicles.
• Scan the vehicle with an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the reductant injection valve for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the reductant injection valve if faulty.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Ford F-250
• Chevrolet Silverado
• Ram 2500
• Regularly inspect and maintain the emissions system.
• Use high-quality DEF fluid.
• Avoid overloading the vehicle.
Emissions Control Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional as soon as possible.
Emissions-related components may be covered under a longer warranty period. Check with the manufacturer.
The P2058 code has been associated with vehicles using Selective Catalytic Reduction (SCR) systems, which became more common in diesel engines to meet stricter emissions standards.
Moderate – Should be addressed soon to prevent increased emissions and potential engine performance issues.
Driving with a malfunctioning emissions system may violate emissions regulations and contribute to environmental pollution.
• Engine running
• Vehicle at operating temperature
The reductant injection valve is typically located near the exhaust system, often mounted on or near the SCR catalyst.
Q: Can I drive with a P2058 code?
A: While you may be able to drive, it's not recommended as it can lead to increased emissions and potential engine damage.
Q: What is DEF fluid?
A: DEF stands for Diesel Exhaust Fluid, a urea-based solution used in diesel engines to reduce emissions.
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Fitment Required · Vehicle-fitment part
Relevant when catalyst-efficiency or emissions faults persist after proper diagnosis.
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Catalytic converters are highly vehicle-specific and should not be purchased by code alone.
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