The P20B5 fault code in automobiles refers to a problem with the Reductant Metering Unit Heater Control. 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 Metering Unit Heater Control, an open or shorted harness, or a poor electrical connection.

It is important to address this issue promptly as it can lead to reduced fuel efficiency and increased emissions. The repair process involves visually inspecting the wiring harness and connectors for damage and checking for broken or corroded pins.

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

To interpret the fault code, it is recommended to check the possible causes listed above.

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 p20b5 fault code. Here are some symptoms to look out for:

  • The P20B5 fault code in automobiles can cause several symptoms, including the engine light turning on or the service engine soon warning light appearing.
  • Other symptoms may include reduced engine power, decreased fuel efficiency, rough idling, stalling, and difficulty starting the engine.
  • Additionally, the vehicle may emit unusual smells or sounds, and the exhaust emissions may be abnormal.
  • It is important to address these symptoms promptly to prevent further damage to the vehicle and ensure safe driving conditions.

The P20B5 automobile fault code can be caused by a faulty reductant metering unit heater control, open or shorted harness, or poor electrical connection.

  • The automobile fault code P20B5 can be caused by a faulty Reductant Metering Unit Heater Control.
  • It can also be caused by an open or shorted Reductant Metering Unit Heater Control harness.
  • Additionally, a poor electrical connection in the Reductant Metering Unit Heater Control circuit can also trigger this fault code.

To fix the automobile fault code p20b5, check the possible causes and inspect related wiring harness and connectors for damage.

  • To fix the automobile fault code P20B5, you need to check the possible causes listed above.
  • Inspect the wiring harness and connectors visually.
  • 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 automobile fault code P20B5 is related to the reductant heater control circuit.

The estimated repair time for this fault code is 1.0 hour. The cost of fixing this fault code depends on the hourly rate charged by the auto repair shop.

The average hourly rate charged by most auto repair shops is between $75 and $150. Therefore, the cost of fixing the P20B5 fault code can range from $75 to $150.

The P20B5 code is a generic description for the Reductant Metering Unit Heater Control CircuitOpen.

However, the manufacturer may have a different description for your specific vehicle model and year. Unfortunately, we do not have any additional information about this OBDII code at this time. If you have any questions or concerns, please feel free to post them in the comments section below for more information.

What are the possible causes of the P20B5 fault code in an automobile?

If you’re experiencing the P20B5 fault code in your automobile, you may notice that the engine light is on or the service engine soon warning light is illuminated. This fault code is typically caused by a faulty reductant metering unit heater control, an open or shorted harness, or a poor electrical connection in the control circuit. To fix the issue, it’s important to visually inspect the wiring harness and connectors, check for damaged components, and look for broken, bent, pushed out, or corroded connector pins.

How can one visually inspect the wiring harness and connectors related to the Reductant Metering Unit Heater Control?

If you’re experiencing an Engine Light ON or Service Engine Soon Warning Light, it could be due to a faulty Reductant Metering Unit Heater Control. To fix this issue, you should visually inspect 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 if the Reductant Metering Unit Heater Control harness is open or shorted, or if there is a poor electrical connection in the circuit.

What are the consequences of ignoring the P20B5 fault code in an automobile?

Ignoring the P20B5 fault code in an automobile, which is indicated by the engine light turning on, can lead to serious consequences. The fault is caused by a faulty reductant metering unit heater control or poor electrical connection, and can result in reduced engine performance and increased emissions. It is important to visually inspect the wiring harness and connectors and check for damaged components to avoid further damage.

p20b5 error fault code explained

If you see the Engine Light ON or Service Engine Soon Warning Light with the fault code P20B5, it could be due to a faulty Reductant Metering Unit Heater Control or poor electrical connection. Check the wiring harness and connectors for any damage or corrosion.

Inspect the components and connector pins for any breakage, bending, or pushing out.

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