AutoCodes – Generic – P1C9F

P1C9F Code - Gear Shift Position Sensor 3 Circuit High

Quick Answer

This diagnostic compares the output signal of the sensor to threshold values of normal operations. Common causes include Faulty Gear Shift Position Sensor 3, Gear Shift Position Sensor 3 harness is open or shorted, Gear Shift Position Sensor 3 circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P1C9F indicates Gear Shift Position Sensor 3 Circuit High.
Common causes: Common causes include Faulty Gear Shift Position Sensor 3, Gear Shift Position Sensor 3 harness is open or shorted, Gear Shift Position Sensor 3 circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 1,031

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 12, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1C9F Description

This diagnostic compares the output signal of the sensor to threshold values of normal operations. When the signal is out of range the diagnostic will be considered failing. The sensor is mounted next to the 5th - RV gear engagement actuator to detect a linear movement of the piston. For this purpose a permanent magnet is mounted on the piston which is moved over a complete travel stroke. The magnet position generates a saturation area in the internal ferromagnetic core of the sensor which is transformed to 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.

OBDII Code P1C9F - Gear Shift Position Sensor 3 Circuit High - AutoCodes.com — P1C9F Code - Gear Shift Position Sensor 3 Circuit High

What does this mean?

What are the Possible Causes of the DTC P1C9F?

Faulty Gear Shift Position Sensor 3
Gear Shift Position Sensor 3 harness is open or shorted
Gear Shift Position Sensor 3 circuit poor electrical connection
Faulty Transmission Control Module (TCM)

How to Fix the DTC P1C9F?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1C9F code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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Information for Specific Makes

P1C9F Chrysler — Gear Shift Position Sensor 3 Circuit High
P1C9F Dodge — Gear Shift Position Sensor 3 Circuit High
P1C9F Fiat — Gear Shift Position Sensor 3 Circuit High
P1C9F Jeep — Gear Shift Position Sensor 3 Circuit High

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1C9F Code

1. What are common symptoms of OBDII code P1C9F Gear Shift Position Sensor 3 Circuit High?

- Common symptoms include difficulty shifting gears, the transmission getting stuck in a particular gear, and the vehicle not starting.

2. What are the possible causes of OBDII code P1C9F Gear Shift Position Sensor 3 Circuit High?

- Possible causes include a faulty gear shift position sensor, damaged wiring or connectors in the sensor circuit, or a problem with the transmission control module.

3. How can I diagnose the Gear Shift Position Sensor 3 Circuit High issue?

- Diagnose the issue by using an OBDII scanner to read the code, inspecting the gear shift position sensor and its wiring for damage, and testing the sensor's resistance and output signal.

4. Can I continue driving with OBDII code P1C9F active?

- It is not recommended to continue driving with this code active, as it can lead to further transmission problems and potential safety issues.

5. How can I repair OBDII code P1C9F Gear Shift Position Sensor 3 Circuit High?

- Repair options include replacing the faulty gear shift position sensor, repairing or replacing damaged wiring or connectors, and clearing the code with an OBDII scanner.

6. Is it possible to reset OBDII code P1C9F Gear Shift Position Sensor 3 Circuit High without fixing the underlying issue?

- While you can clear the code temporarily, it will likely reappear if the underlying issue with the gear shift position sensor circuit is not addressed.

7. Will OBDII code P1C9F cause my vehicle to fail an emissions test?

- Yes, having this code active may cause your vehicle to fail an emissions test, as it indicates a problem with the transmission system.

8. Can a DIY enthusiast repair OBDII code P1C9F Gear Shift Position Sensor 3 Circuit High?

- Depending on your skill level and access to tools, some DIY enthusiasts may be able to replace the gear shift position sensor or repair the wiring themselves.

9. How much does it typically cost to repair OBDII code P1C9F Gear Shift Position Sensor 3 Circuit High at a mechanic?

- Repair costs can vary depending on the labor rates and parts needed, but it may range from $200 to $500 at a mechanic for this type of repair.

10. Are there any preventive measures to avoid OBDII code P1C9F Gear Shift Position Sensor 3 Circuit High?

- Regularly inspecting and maintaining the gear shift position sensor, as well as being mindful of any symptoms related to shifting gears, can help prevent this code from appearing.