[SOLVED] P116A Code: Fix O2 Signal Circuit For Nox Sensor 1

The automobile fault code P116A indicates a problem with the Nitrogen Oxides (NOx) Sensor. The most common symptom is the Engine Light being ON or the Service Engine Soon Warning Light.

The cause of this fault code can be a faulty NOx sensor, an open or shorted sensor harness, or a poor electrical connection in the sensor circuit.

To fix this issue, you should visually inspect the wiring harness and connectors, checking for any damage or corrosion.

Look out for broken, bent, pushed out, or corroded pins in the connectors. The repair time for this issue is estimated to be around 1.0 hour.

It is important to address this problem promptly to ensure optimal engine performance and emissions control.

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 be a sign of the p116a fault code.

  • The symptoms of the automobile fault code P116A include the Engine Light being ON or the Service Engine Soon Warning Light being illuminated.

The automobile fault code p116a can be caused by a faulty NOx sensor, an open or shorted sensor harness, or a poor electrical connection in the sensor circuit.

  • The fault code P116A can be caused by a faulty Nitrogen Oxides (NOx) sensor, an open or shorted Nitrogen Oxides sensor harness, or a poor electrical connection in the Nitrogen Oxides sensor circuit.

To fix the p116a fault code, start by visually inspecting the wiring harness, connectors, and components for any damage or corrosion.

  • To fix the automobile fault code p116a, start by checking the possible causes mentioned above.
  • Then, visually inspect the wiring harness and connectors related to the issue.
  • Look for any damaged components and check for broken, bent, pushed out, or corroded connector pins.
  • This fix is estimated to take approximately 1.0 hour.

The automobile fault code p116a diagnosis and fixing cost is influenced by the estimated repair time of 1.0 hour.

Most auto repair shops charge between $75 and $150 per hour for their services.

The P116A fault code refers to the O2 signal circuit of NOx Sensor 1.

This sensor is part of the selective catalytic reduction system used to reduce NOx emissions in diesel engines. There are two NOx sensors, one upstream and one downstream of the selective catalytic reduction system.

They are connected to the control module via CAN and exchange information through it. The NOx sensor contains a sensing cell, a pumping cell, and a heater. It measures the concentration of NOx in the exhaust gas by maintaining a constant reference voltage across the sensing cell.

The amount of current required to maintain this voltage is proportional to the NOx concentration. The ECM adjusts the amount of diesel exhaust fluid added based on the NOx levels. The P116A code is set when the ECM detects a fault in the NOx sensor circuitry or a performance fault in the NOx sensor for more than 2 seconds.

This could indicate a problem with the O2 signal circuit of NOx Sensor 1, which may require further diagnosis and repair.

What are the possible causes for the automobile fault code p116a?

If you see the engine light or service engine soon warning light on, the fault code P116A could be the culprit. This code is often caused by a faulty Nitrogen Oxides (NOx) sensor, an open or shorted sensor harness, or a poor electrical connection in the sensor circuit. To fix the issue, 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. Don’t forget to check the possible causes listed above for a more comprehensive solution.

How can I visually inspect the wiring harness and connectors to fix the p116a fault code?

If you’re dealing with the p116a fault code and your engine light is on, it’s time to take action. The cause could be a faulty Nitrogen Oxides (NOx) Sensor, an open or shorted sensor harness, or a poor electrical connection in the sensor circuit. To fix this issue, start by visually inspecting the wiring harness and connectors. Look for any signs of damage, such as broken or bent pins, corrosion, or components that are out of place. Don’t forget to check the “Possible Causes” listed above for further troubleshooting.

What should I look for when checking for damaged components or corroded connector pins to resolve the p116a fault code?

When resolving the p116a fault code, start by checking for damaged components or corroded connector pins. This can be done by visually inspecting the related wiring harness and connectors. Look for any broken, bent, pushed out, or corroded pins. By addressing these issues, you can effectively fix the problem and prevent further complications.

p116a error fault code explained

If your engine light is on and you’re getting a P116A fault code, it could be due to a faulty Nitrogen Oxides (NOx) sensor or issues with the sensor’s harness and circuit connection.

To fix it, visually inspect the wiring harness and connectors for any damage, and check for broken or corroded pins.

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