The P20C6 code is an OBD-II trouble code that indicates a problem with the Reductant Heater “D” control circuit performance in vehicles equipped with a diesel engine and a selective catalytic reduction (SCR) system. This code is urgent and suggests that immediate attention is required.
What Does the P20C6 Code Mean?
The P20C6 code specifically refers to issues with the control circuit of the Reductant Heater “D”. This heater is responsible for warming Diesel Exhaust Fluid (DEF) to prevent it from crystallizing, especially in colder temperatures. When the heater does not perform as expected, it can lead to further problems in the emissions control system.
What Causes the P20C6 Code?
Several factors can trigger the P20C6 code, including:
- Glow plug control module failure
- Reductant tank heater failure
- Wiring issues within the control circuit
What Are the Symptoms of the P20C6 Code?
Drivers may experience the following symptoms when the P20C6 code is present:
- Inability to complete Diesel Particulate Filter (DPF) regeneration
- Check Engine Light illuminated
- Reduced engine performance
How Serious Is the P20C6 Code?
The P20C6 code is classified as urgent, meaning that it can lead to severe vehicle damage if not addressed promptly. Delaying repairs could result in further complications in the emissions system and could potentially harm the driver and passengers.
How to Diagnose the P20C6 Code
To properly diagnose the P20C6 code, a mechanic should follow these steps:
- Use an OBD-II scanner to confirm the presence of the P20C6 code, along with any other related codes.
- Inspect the wiring and connectors associated with the Reductant Heater to check for damage or corrosion.
- Test the Reductant Heater and the glow plug control module for proper operation.
- Perform a visual inspection of the DEF system for any leaks or blockages.
Common Repairs for the P20C6 Code
Depending on the diagnosis, common repairs may include:
- Replacing a faulty Reductant Heater
- Repairing or replacing damaged wiring or connectors
- Replacing a defective glow plug control module
How Much Does It Cost to Fix the P20C6 Code?
The cost to fix the P20C6 code can vary widely depending on the specific repairs needed. Generally, repairs can range from $200 to $1,000, depending on labor rates and the parts required.
Can I Fix the P20C6 Code Myself?
While some experienced car owners may attempt to diagnose and fix the P20C6 code themselves, it is crucial to have a solid understanding of automotive systems. If you are not confident in your abilities, it is recommended to seek professional assistance to avoid further complications.
