The P20C8 fault code in automobiles indicates a problem with the reductant heater system.

This issue is often signaled by the illumination of the engine light or service engine soon warning light. The possible causes of this fault code include a faulty reductant heater, an open or shorted reductant heater harness, or a poor electrical connection in the reductant heater circuit. To fix this issue, one should visually inspect the wiring harness and connectors, check for damaged components, and look for broken, bent, pushed out, or corroded connector pins.

The repair time for this issue is estimated to be around 1.0 hour.

Repair Importance Level10.0 (Out of 10)
Estimated Repair TimeApproximately 1.0 hour
Repair Difficulty Level10.0 (Out of 10)

If you notice the engine light on or service engine soon warning light, it could be a sign of the P20C8 fault code.

Here are some symptoms to look out for:

  • The P20C8 fault code in an automobile can cause several symptoms.
  • The most common symptom is the illumination of the engine light or service engine soon warning light.
  • Other symptoms include reduced engine power, decreased fuel efficiency, rough idling, and difficulty starting the engine.
  • Additionally, the vehicle may experience stalling or hesitation during acceleration, and there may be a noticeable decrease in overall performance.
  • It is important to address these symptoms promptly to prevent further damage to the vehicle.

The P20C8 automobile fault code can be caused by a faulty reductant heater, open or shorted harness, or poor electrical connection.

  • The automobile fault code P20C8 can be caused by a faulty reductant heater.
  • It can also be caused by an open or shorted reductant heater harness.
  • Additionally, a poor electrical connection in the reductant heater circuit can also trigger this fault code.

Below are the possible fixes for the automobile fault code p20c8, including inspecting wiring harness and connectors for damage or corrosion.

  • To fix the automobile fault code P20C8, you need to check the possible causes listed above.
  • Visually inspect the related wiring harness and connectors.
  • Look for damaged components and check for broken, bent, pushed out, or corroded connector’s pins.
  • This fix will take an estimated repair time of 1.0 hour.

The fault code P20C8 indicates an issue with the Reductant Control Module. The estimated repair time for this fault code is 1.0 hour.

The cost of fixing this issue can vary depending on the auto repair shop, but it is common for them to charge between $75 and $150 per hour. Other factors that may influence the cost include the severity of the issue, the type of vehicle, and the location of the repair shop. It is important to address this issue promptly to avoid further damage and potential safety hazards.

The P20C8 code refers to a problem with the Reductant Heater ‘D’ Control Circuit.

The reductant heater and sender assembly contains a heating element that thaws liquid reductant during cold temperatures.

When the Powertrain Control Module detects the diesel exhaust fluid temperature dropping to freezing point, it commands the glow plug control module to provide voltage to the heating element.

If the control circuit for the Reductant Heater ‘D’ is high, it means there is an issue with the heating element and it needs to be checked and repaired.

What are the possible causes of the P20C8 automobile fault code?

If your engine light is on and you’re seeing the P20C8 fault code, it could be due to a faulty Reductant Heater, an open or shorted Reductant Heater harness, or a poor electrical connection in the Reductant Heater circuit. To fix this issue, you should visually inspect the wiring harness and connectors, check for damaged components, and look for broken, bent, pushed out, or corroded connector’s pins.

How can I visually inspect the wiring harness and connectors related to the reductant heater?

If you’re experiencing an Engine Light ON or Service Engine Soon Warning Light, it could be due to a faulty Reductant Heater, an open or shorted Reductant Heater harness, or a poor electrical connection in the Reductant Heater circuit. To fix this issue, start by visually inspecting the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins. This will help you identify the root cause of the problem and take the necessary steps to fix it.

What should I do if I find damaged components or broken, bent, pushed out, or corroded connector’s pins during the inspection for the P20C8 fault code?

If you find damaged components or broken, bent, pushed out, or corroded connector’s pins during the inspection for the P20C8 fault code, you should visually inspect the related wiring harness and connectors. Check for any possible causes listed above, and make sure to fix any issues with the Reductant Heater harness that may be open or shorted. It’s important to ensure that the Reductant Heater circuit has a good electrical connection to prevent the Engine Light from turning on again.

p20c8 error fault code explained

If your engine light is on, it could be due to a faulty reductant heater, an open or shorted harness, or poor electrical connection. Visually inspect the wiring harness and connectors for damage or corrosion. Check for broken, bent, or pushed out pins.

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