P2062 Fault Code

Reductant/Regeneration Supply Control Circuit/Open

• What does that mean?
• Symptoms
• Causes
• Solutions

The P2062 fault code indicates an issue with the reductant or regeneration supply control circuit, potentially leading to reduced engine performance or increased emissions. This fault code is commonly triggered when the system responsible for injecting a secondary reductant to control emissions is compromised.

• Reductant System: Generally involves a urea-based solution used in diesel engines to reduce emissions.
• Regeneration Process: Refers to the cleansing of the diesel particulate filter (DPF) to maintain efficiency and compliance with emission standards.

What are the symptoms of the P2062 code?

Symptoms associated with a P2062 code may include:

• Check Engine Light illuminated on the dashboard.
• Reduced engine performance, including rough idling or decreased acceleration.
• Increased exhaust emissions due to improper reductant dosing.
• Possible activation of limp mode, limiting the vehicle's speed and performance to prevent further damage.

What causes the P2062 code?

Common causes of the P2062 code include:

• Damage or disconnection in the wiring harness connected to the reductant supply control circuit.
• Faulty reductant pump or level sensor.
• Blockages or leaks in the reductant lines or injectors.
• Defective ECU (Engine Control Unit) or software issues related to the reductant system.

How to fix P2062?

To resolve the P2062 fault code, consider the following steps:

• Inspect the wiring and connectors for the reductant supply control circuit, repairing or replacing any damaged components.
• Test the reductant pump and level sensor for proper operation; replace if malfunctioning.
• Ensure there are no clogging issues or leaks in the reductant lines and fix them as necessary.
• Reprogram or replace the ECU if it is determined to be faulty after thorough diagnostics.