The automobile fault code P11D9 indicates a problem with the Nitrogen Oxides (NOx) Sensor 2.

This can be identified by the Engine Light or Service Engine Soon Warning Light being illuminated. The possible causes include a faulty sensor, an open or shorted harness, or a poor electrical connection. To fix this issue, it is recommended to visually inspect the wiring harness and connectors for any damage.

Additionally, check for broken, bent, pushed out, or corroded pins on the connectors. The repair time for this fault code is estimated to be 1.0. It is important to address this issue promptly to ensure optimal engine performance and reduce emissions.

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

When the engine light is on or the service engine soon warning light is illuminated, it could indicate a fault code p11d9.

  • The symptoms of the automobile fault code p11d9 include the Engine Light being ON or the Service Engine Soon Warning Light being illuminated.

The automobile fault code p11d9 can be caused by a faulty NOx Sensor 2, an open or shorted harness, or a poor electrical connection in the circuit.

  • The fault code P11D9 can be caused by: a faulty Nitrogen Oxides (NOx) Sensor 2, an open or shorted Nitrogen Oxides Sensor 2 harness, or a poor electrical connection in the Nitrogen Oxides Sensor 2 circuit.

To fix the automobile fault code p11d9, start by visually inspecting the wiring harness, connectors, and components for any damage or corrosion.

  • To fix the automobile fault code p11d9, follow these steps: 1.
  • Check the possible causes mentioned above.
  • 2.
  • Visually inspect the wiring harness and connectors related to the fault code.
  • 3.
  • Look for any damaged components.
  • 4.
  • Check for broken, bent, pushed out, or corroded pins in the connectors.
  • 5.
  • Repair time estimation: 1.0 hour.

The factors influencing the cost of diagnosing and fixing the automobile fault code p11d9 are the estimated repair time and the hourly rate charged by auto repair shops. The estimated repair time for this fault code is 1.0 hour.

Auto repair shops typically charge between $75 and $150 per hour for their services.

These factors will determine the overall cost of diagnosing and fixing the p11d9 fault code.

The P11D9 fault code refers to the O2 Pump Current Control Circuit having a low voltage in NOx Sensor 2. This fault code is related to the Nitrogen Oxides (NOx) sensors, which are part of the selective catalytic reduction system in diesel engines.

There are two NOx sensors, one placed upstream and one downstream of the selective catalytic reduction system. These sensors measure the concentration of NOx in the exhaust gas. They are connected to the Engine Control Module (ECM) via CAN and exchange information through it.

The NOx sensors have a sensing cell, a pumping cell, and a heater.

The sensing cell measures the concentration of NOx in the exhaust gas, while the pumping cell controls the pump current to maintain a constant voltage in the sensing cell. In the case of the P11D9 fault code, the ECM has detected a low voltage in the O2 Pump Current Control Circuit of NOx Sensor 2.

This could indicate a fault in the circuitry or a performance issue with the sensor. The ECM sets a Diagnostic Trouble Code (DTC) when this fault is detected for more than 2 seconds.

It is important to address this fault code promptly to ensure proper functioning of the selective catalytic reduction system and reduce NOx emissions.

A qualified technician should diagnose and repair the issue to restore the vehicle’s performance and efficiency.

What are the possible causes for the automobile fault code p11d9?

If you see the engine light or service engine soon warning light on, the fault code P11D9 could be the culprit. This code is often caused by a faulty Nitrogen Oxides (NOx) Sensor 2, an open or shorted harness, or a poor electrical connection in the NOx Sensor 2 circuit. To fix this issue, start by visually inspecting the wiring harness and connectors. Look for any damaged components and check for broken, bent, pushed out, or corroded pins in the connectors. Don’t forget to check the “Possible Causes” listed above for further troubleshooting.

How can I visually inspect the wiring harness and connectors to fix the fault code p11d9?

To fix fault code P11D9, start by visually inspecting the wiring harness and connectors. Look for any damaged components and check for broken, bent, pushed out, or corroded connector pins. This can help identify any issues with the Nitrogen Oxides Sensor 2 harness, such as an open or shorted circuit or poor electrical connection. By checking these possible causes, you can take the necessary steps to resolve the problem and turn off the Engine Light or Service Engine Soon Warning Light.

What should I look for when checking for damaged components and connector’s pins to resolve the fault code p11d9?

When resolving the fault code p11d9, start by checking for damaged components and connector’s pins. This can be done by visually inspecting the related wiring harness and connectors. Look for any signs of damage such as broken, bent, pushed out, or corroded pins. By doing this, you can identify any issues with the Nitrogen Oxides (NOx) Sensor 2 or its circuit connection. This will help you determine if the fault lies in a faulty sensor or a poor electrical connection.

p11d9 error fault code explained

If you’re seeing the Engine Light ON or the Service Engine Soon Warning Light, it could be due to a faulty Nitrogen Oxides (NOx) Sensor 2. To fix this, visually inspect the wiring harness and connectors, checking for any damage or corrosion.

Look out for broken or bent pins on the connectors.

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