The P21B0 fault code in automobiles indicates a problem with the Reductant Level Sensor 3, which can cause the engine light to turn on. This fault code can be caused by a faulty sensor, an open or shorted harness, or a poor electrical connection. It is important to visually inspect the wiring harness and connectors for any damage or corrosion.

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

To interpret the fault code, it is recommended to check the “Possible Causes” listed above and look for any broken, bent, pushed out, or corroded connector’s pins.

Repair Importance Level6.67 (Out of 10)
Estimated Repair TimeApproximately 1.0 hour
Repair Difficulty Level6.67 (Out of 10)

If you notice the Engine Light ON or Service Engine Soon Warning Light, it could be a sign of p21b0 fault code.

Here are the symptoms to look out for:

  • The P21B0 fault code in automobiles can cause the following symptoms: Engine Light ON, Service Engine Soon Warning Light, reduced engine power, poor acceleration, engine stalling, rough idling, decreased fuel efficiency, and difficulty starting the engine.
  • It is important to address these symptoms promptly to prevent further damage to the vehicle.

The P21B0 fault code can be caused by a faulty reductant level sensor, open or shorted harness, or poor electrical connection.

  • The automobile fault code P21B0 can be caused by a faulty Reductant Level Sensor 3.
  • It can also be caused by an open or shorted Reductant Level Sensor 3 harness.
  • Additionally, a poor electrical connection in the Reductant Level Sensor 3 circuit can also trigger this fault code.

To fix the p21b0 automobile fault code, check the possible causes and inspect related wiring harness and connectors for damage.

  • To fix the automobile fault code P21B0, first, check the possible causes listed above.
  • Then, 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 P21B0 indicates an issue with the hybrid battery pack.

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 to the vehicle and potential safety hazards.

The P21B0 fault code is related to the reductant leveltemperature sensor in the automobile. The sensor provides information on reductant level and temperature to the Engine Control Module (ECM).

The level sensor consists of three sensing elements, with sensor 3 being the highest. The ECM sets a DTC when it detects an invalid level or temperature serial data message from the sensor. The P21B0 code is set when the ECM receives a serial data message from the reductant sensor module that the emission reduction fluid tank level sensor 3 voltage is between 3.56-4.74 V for greater than 3 s, indicating a high voltage circuit.

What are the possible causes of the P21B0 fault code?

If you see the engine light on or the service engine soon warning light, it could be due to the P21B0 fault code. This code is usually caused by a faulty Reductant Level Sensor 3, an open or shorted harness, or a poor electrical connection in the 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 fix the P21B0 fault code?

If you’re experiencing the P21B0 fault code, which is indicated by the Engine Light ON or Service Engine Soon Warning Light, it could be due to a faulty Reductant Level Sensor 3, an open or shorted Reductant Level Sensor 3 harness, or a poor electrical connection in the Reductant Level Sensor 3 circuit. 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.

What should I visually inspect to troubleshoot the P21B0 fault code?

If you’re experiencing the P21B0 fault code, which is indicated by the Engine Light ON or Service Engine Soon Warning Light, 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 fault code is commonly caused by a faulty Reductant Level Sensor 3, an open or shorted Reductant Level Sensor 3 harness, or a poor electrical connection in the Reductant Level Sensor 3 circuit.

p21b0 error fault code explained

If you see the Engine Light ON or Service Engine Soon Warning Light, it could be due to a faulty Reductant Level Sensor 3, an open or shorted harness, or poor electrical connection.

Visually inspect the wiring harness and connectors for damage and check for broken, bent, pushed out, or corroded connector’s pins.

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