P20C6

DTC P20C6, sometimes indicated as P20C600 is an OBD diagnostic trouble code indicating a manufacturer-specific fault with the vehicle powertrain (i.e. engine and gearbox). This code identifies an error with the air/fuel mixture causing reductant heater "d" control circuit performance.

The Diesel Exhaust Fluid (DEF) reductant heater "D" control circuit performance fault means that the reductant heater "D" control circuit is not performing as expected. This fault can be caused by a number of things, including a defective reductant heater "D" control circuit, a defective reductant heater "D" control valve, or a defective reductant heater "D" wiring harness.
The best way to troubleshoot this fault is to start by checking the reductant heater "D" control circuit for continuity. If the circuit is good, then check the reductant heater "D" control valve for proper operation. If the control valve is good, then check the reductant heater "D" wiring harness for damage or defects.

• P20C6: Reductant Heater D Control Circuit Performance
• P20C6: Reductant Heater "D" Control Circuit Performance
• P20C6: Reductant heater control D – performance problem
• P20C6 00: Reductant heater control D - performance problem