What Does P2062 Mean?
The control module has detected an open circuit or failure in the reductant supply control system that delivers diesel exhaust fluid (DEF) or other regeneration fluids. No continuity or communication exists in the control circuit.
Common Causes
40%
Broken or disconnected wiring in reductant supply control circuit
25%
Failed reductant injection valve or solenoid with open coil
20%
Blown fuse or fusible link in reductant supply control circuit
10%
Corroded or damaged connector terminals preventing electrical contact
5%
Failed reductant supply pump with open motor windings
Diagnostic Steps
1
Step 1: Visually inspect all wiring and connectors in reductant supply system for damage or disconnection
2
Step 2: Check all related fuses and fusible links for continuity
3
Step 3: Disconnect reductant valve/injector connector and measure resistance across solenoid terminals
4
Step 4: Perform continuity test from control module connector to reductant valve connector on both control and ground circuits
5
Step 5: If circuits test good, check for power and ground at valve connector during commanded operation
Estimated Repair Cost
$200 - $1,200
Parts + labor, varies by vehicle and location
The control module has detected an open circuit or failure in the reductant supply control system that delivers diesel exhaust fluid (DEF) or other regeneration fluids. No continuity or communication exists in the control circuit.
The most common cause of P2062 (Reductant/Regeneration Supply Control Circuit/Open) is: Broken or disconnected wiring in reductant supply control circuit
Typical repair costs for P2062 range from $200 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle remains drivable but will fail to meet emission standards. Extended operation may result in derate or engine shutdown depending on regulations.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2062 to identify the root cause.
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Quick Info
Category
Powertrain
System
Emissions Control System (Diesel Aftertreatment)
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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