P2062: Reductant/Regeneration Supply Control Circuit/Open
Code P2062 indicates an open circuit in the reductant (diesel exhaust fluid, DEF) supply control circuit, which is part of the selective catalytic reduction (SCR) system. This circuit controls the pump or valve that delivers DEF to the exhaust stream. An open circuit means there is a break in the electrical path, preventing the control module from properly regulating DEF flow. This can lead to increased NOx emissions and may trigger a check engine light.
01. Most Common Causes
- Open or shorted wiring in the reductant supply control circuit
- Faulty reductant pump or valve
- Corroded or loose electrical connectors
- Failed SCR control module
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine performance or limp mode
- Increased diesel exhaust fluid consumption
- Failed emissions test
03. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm code P2062 and check for related codes.
Step 2: Visually inspect the reductant supply control circuit wiring and connectors for damage, corrosion, or loose connections.
Step 3: Test the reductant pump or valve resistance and voltage supply using a multimeter; compare to manufacturer specifications.
Step 4: If wiring and components are intact, test the SCR control module output signals; replace module if faulty.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances with this code, as it can cause increased emissions and may lead to reduced engine power or limp mode. Immediate diagnosis is advised.
How much does it cost to fix?▼
The cost to fix P2062 typically ranges from $50 to $150 for diagnostic and minor repairs like wiring or connector fixes. If the reductant pump or module needs replacement, costs can be higher.