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Engine-Codes – Generic – P2058

P2058 Code - Reductant Injection Valve Circuit High Bank 2 Unit 2

Quick Answer

The diagnostic trouble code P2058 indicates a problem with the reductant injection valve circuit on Bank 2 Unit 2 of the vehicle. Common causes include Faulty Reductant Injection Valve: The primary cause of the P2058 code is a defective reductant injection valve that is not functioning correctly, Wiring Issues: Damaged or corroded wiring in the circuit connecting the reductant injection valve to the PCM can lead to high voltage readings, PCM Malfunction: A malfunctioning Powertrain Control Module (PCM) can also trigger the P2058 code by providing incorrect voltage signals to the reductant injection valve. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P2058 indicates Reductant Injection Valve Circuit High Bank 2 Unit 2.
Common causes
Common causes include Faulty Reductant Injection Valve: The primary cause of the P2058 code is a defective reductant injection valve that is not functioning correctly, Wiring Issues: Damaged or corroded wiring in the circuit connecting the reductant injection valve to the PCM can lead to high voltage readings, PCM Malfunction: A malfunctioning Powertrain Control Module (PCM) can also trigger the P2058 code by providing incorrect voltage signals to the reductant injection valve.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code P2058 Description

The diagnostic trouble code P2058 indicates a problem with the reductant injection valve circuit on Bank 2 Unit 2 of the vehicle. In modern diesel vehicles, reductant injection systems are used to reduce harmful emissions by injecting a urea-based solution (commonly known as Diesel Exhaust Fluid or DEF) into the exhaust stream. This helps convert harmful nitrogen oxides (NOx) into harmless nitrogen and water vapor.

OBDII Code P2058 - Reductant Injection Valve Circuit High Bank 2 Unit 2
P2058 Code - Reductant Injection Valve Circuit High Bank 2 Unit 2

Common Causes of P2058

  1. Faulty Reductant Injection Valve: The primary cause of the P2058 code is a defective reductant injection valve that is not functioning correctly.
  2. Wiring Issues: Damaged or corroded wiring in the circuit connecting the reductant injection valve to the PCM can lead to high voltage readings.
  3. PCM Malfunction: A malfunctioning Powertrain Control Module (PCM) can also trigger the P2058 code by providing incorrect voltage signals to the reductant injection valve.
  4. DEF Quality: Low-quality or contaminated DEF can clog the reductant injection system and cause issues with the valve circuit.
  5. Environmental Factors: Exposure to extreme temperatures or harsh driving conditions can also contribute to the failure of the reductant injection valve circuit.

Symptoms of P2058

  1. Check Engine Light: The most common symptom associated with the P2058 code is the illumination of the Check Engine Light on the vehicle's dashboard.
  2. Reduced Fuel Efficiency: A malfunctioning reductant injection valve can lead to decreased fuel efficiency due to improper emission control.
  3. Engine Misfires: In some cases, the engine may experience misfires or hesitation during acceleration due to the high voltage in the reductant injection valve circuit.
  4. Failed Emissions Test: If the vehicle is subjected to an emissions test, it may fail to meet the required standards due to elevated NOx emissions.

How to Fix P2058

  1. Diagnostic Testing: Begin by performing a comprehensive diagnostic test to confirm the P2058 code and identify the specific cause of the issue.
  2. Inspect Wiring: Check the wiring harness connecting the reductant injection valve to the PCM for any signs of damage, corrosion, or loose connections. Repair or replace as needed.
  3. Test the Reductant Injection Valve: Test the functionality of the reductant injection valve to determine if it is faulty. Replace the valve if necessary.
  4. Clear Codes: After completing the repairs, clear the diagnostic trouble codes stored in the PCM to reset the Check Engine Light.
  5. Final Testing: Conduct a final road test to ensure that the issue has been resolved and that the vehicle is operating correctly.

Cost to Fix P2058

The typical repair costs for addressing the P2058 code can range from $200 to $600, including parts and labor. However, it is essential to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It is advisable to check local rates for a more precise estimate before proceeding with the repairs.

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Code P2058 Information for Specific Makes

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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