The P20C3 fault code in automobiles indicates a problem with the reductant heater system. The most common symptom is the illumination of the engine light or service engine soon warning light. The cause of this issue could be a faulty reductant heater, an open or shorted reductant heater harness, or a poor electrical connection in the reductant heater circuit.

The importance of repairing this issue lies in the fact that it can lead to increased emissions and reduced fuel efficiency.

The repair difficulty is moderate, with a repair time of 1.0. To fix the problem, one should visually inspect the wiring harness and connectors, check for damaged components, and look for broken, bent, pushed out, or corroded connector pins.

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 p20c3 fault code. Here are the symptoms to look out for:

  • The P20C3 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 a decrease in acceleration and overall performance.
  • It is important to address these symptoms promptly to prevent further damage to the vehicle.

The P20C3 automobile fault code can be caused by a faulty reductant heater, open or shorted harness, or poor electrical connection.

  • The automobile fault code P20C3 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 some possible fixes for the automobile fault code p20c3, including inspecting wiring harness and connectors for damage or corrosion.

  • To fix the automobile fault code P20C3, first, check the possible causes listed above.
  • Then, visually inspect the related wiring harness and connectors.
  • Look for any 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 automobile fault code P20C3 has an estimated repair time of 1.0 hour.

The cost of fixing this fault code is influenced by the repair time. Most auto repair shops charge between $75 and $150 per hour for their services. Therefore, the fixing cost of P20C3 will range between $75 and $150, depending on the repair time required.

It is important to consider the repair time and cost when diagnosing and fixing this fault code.

The P20C3 fault code indicates a problem with the reductant heater ‘C’ control circuit. The reductant heater and sender assembly contains a heating element that thaws liquid reductant during cold temperatures. When the reductant temperature sensor detects freezing temperatures, the Powertrain Control Module commands the glow plug control module to provide voltage to the heating element.

If the control circuit is low, it may result in the heating element not functioning properly, leading to issues with the reductant system.

What are the possible causes of the P20C3 automobile fault code?

If your engine light is on and you’re seeing the P20C3 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 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?

If you find damaged components or broken, bent, pushed out, or corroded connector’s pins during the inspection, it could be the cause of the engine light being on. To fix this issue, check the possible causes listed above and visually inspect the related wiring harness and connectors. Look for any damaged components and check for broken, bent, pushed out, or corroded connector’s pins.

p20c3 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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