The P1C99 automobile fault code indicates a problem with the Gear Shift Position Sensor 1 or the Transmission Control Module (TCM). The most common symptom is the Engine Light ON or Service Engine Soon Warning Light.

The cause of this fault code could be a faulty sensor, an open or shorted harness, or a poor electrical connection.

The importance of repairing this issue lies in the fact that it can affect the performance of the transmission and lead to further damage. The repair difficulty is moderate, and it takes around 1.0 hour to fix. To interpret the fault code, one needs to check the possible causes listed above and visually inspect the related wiring harness and connectors.

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 p1c99 fault code.

Here are the symptoms to look out for:

  • The P1C99 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, stalling, and difficulty starting the engine.
  • Additionally, the vehicle may experience transmission shifting problems, and the battery may drain faster than usual.
  • If you notice any of these symptoms, it is important to have your vehicle diagnosed and repaired by a qualified mechanic as soon as possible.

The P1C99 automobile fault code can be caused by a faulty gear shift position sensor, open or shorted harness, poor electrical connection, or a faulty transmission control module.

  • The automobile fault code P1C99 can be caused by a faulty Gear Shift Position Sensor 1.
  • It can also be caused by an open or shorted Gear Shift Position Sensor 1 harness.
  • Poor electrical connection in the Gear Shift Position Sensor 1 circuit can also trigger this fault code.
  • Lastly, a faulty Transmission Control Module (TCM) can also be a cause of the P1C99 fault code.

To fix the p1c99 fault code, check the possible causes and inspect the wiring harness and connectors for any damage or corrosion.

  • To fix the automobile fault code P1C99, you need to check the possible causes listed above.
  • Visually inspect the related wiring harness and connectors for any damage.
  • Look 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 P1C99 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 P1C99 will be between $75 and $150, depending on the repair time required.

The P1C99 fault code is related to the Gear Shift Position Sensor 1 Circuit. This diagnostic compares the sensor’s output signal to normal operation threshold values. The sensor is located near the 1st – 3rd gear engagement actuator to detect linear movement of the piston.

A permanent magnet on the piston generates a saturation area in the sensor’s internal ferromagnetic core, which is transformed into an output position signal. The sensor provides an output signal with Pulse Width Modulation (PWM) at a fixed frequency and duty cycle proportional to the piston position of the actuator.

What are the possible causes of the P1C99 automobile fault code?

If you’re experiencing the P1C99 fault code, your engine light may be on. This could be due to a faulty Gear Shift Position Sensor 1, an open or shorted harness, a poor electrical connection in the circuit, or a faulty Transmission Control Module (TCM). To fix the issue, check the possible causes listed above, visually inspect the wiring harness and connectors, and look for any damaged components or broken, bent, pushed out, or corroded connector pins.

How can I visually inspect the related wiring harness and connectors to fix the P1C99 fault code?

If you’re experiencing an Engine Light ON or Service Engine Soon Warning Light due to a P1C99 fault code, there are a few possible causes to consider. These include a faulty Gear Shift Position Sensor 1, an open or shorted Gear Shift Position Sensor 1 harness, a poor electrical connection in the Gear Shift Position Sensor 1 circuit, or a faulty Transmission Control Module (TCM). To fix the issue, start by visually inspecting the related wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector’s pins.

Is a faulty Transmission Control Module (TCM) a common cause of the P1C99 fault code?

A faulty Transmission Control Module (TCM) is listed as one of the possible causes of the P1C99 fault code, which is indicated by the engine light turning on. Other possible causes include a faulty gear shift position sensor 1, an open or shorted harness, or poor electrical connection. To fix the issue, one 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.

p1c99 error fault code explained

If your engine light is on, it could be due to a faulty gear shift position sensor 1, an open or shorted harness, poor electrical connection, or a faulty transmission control module. Check for these possible causes by visually inspecting the wiring harness and connectors, and looking for damaged components or corroded pins.

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