AutoCodes – Generic – P1C9B

P1C9B Code - Gear Shift Position Sensor 2 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 2, Gear Shift Position Sensor 2 harness is open or shorted, Gear Shift Position Sensor 2 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: P1C9B indicates Gear Shift Position Sensor 2 Circuit High.
Common causes: Common causes include Faulty Gear Shift Position Sensor 2, Gear Shift Position Sensor 2 harness is open or shorted, Gear Shift Position Sensor 2 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 1,851

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 P1C9B 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 2nd - 4th 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 P1C9B - Gear Shift Position Sensor 2 Circuit High - AutoCodes.com — P1C9B Code - Gear Shift Position Sensor 2 Circuit High

What does this mean?

What are the Possible Causes of the DTC P1C9B?

Faulty Gear Shift Position Sensor 2
Gear Shift Position Sensor 2 harness is open or shorted
Gear Shift Position Sensor 2 circuit poor electrical connection
Faulty Transmission Control Module (TCM)

How to Fix the DTC P1C9B?

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 P1C9B 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.

Need more information about the P1C9B code?

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Information for Specific Makes

P1C9B Chrysler — Gear Shift Position Sensor 2 Circuit High
P1C9B Dodge — Gear Shift Position Sensor 2 Circuit High
P1C9B Fiat — Gear Shift Position Sensor 2 Circuit High
P1C9B Jeep — Gear Shift Position Sensor 2 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 P1C9B Code

1. What are common symptoms of OBDII code P1C9B Gear Shift Position Sensor 2 Circuit High?

- Common symptoms include difficulty shifting gears, incorrect gear display on the dashboard, and the vehicle going into limp mode.

2. What could cause the OBDII code P1C9B to appear?

- The code P1C9B may appear due to a faulty gear shift position sensor, damaged wiring or connectors related to the sensor, or a problem with the transmission control module.

3. How can I diagnose the issue causing code P1C9B to be triggered?

- To diagnose the issue, you can use a diagnostic scanner to read the code, inspect the gear shift position sensor and its wiring for any visible damage, and perform a circuit test to check for continuity.

4. Can I continue driving my vehicle with OBDII code P1C9B present?

- It is not recommended to continue driving the vehicle with code P1C9B present, as it can lead to further transmission issues and potentially cause safety hazards.

5. How can I repair OBDII code P1C9B Gear Shift Position Sensor 2 Circuit High?

- Repairing code P1C9B may involve replacing the gear shift position sensor, repairing or replacing damaged wiring or connectors, and clearing the code using a diagnostic scanner.

6. Is it possible to reset OBDII code P1C9B without fixing the underlying issue?

- While you can clear the code temporarily, it is crucial to address the root cause of the problem to prevent the code from reappearing and ensure the proper functioning of the transmission system.

7. Are there any DIY tips for fixing OBDII code P1C9B at home?

- DIY tips for fixing code P1C9B include checking and cleaning the sensor connectors, inspecting the sensor for any visible damage, and consulting the vehicle's service manual for specific repair procedures.

8. Can a faulty gear shift position sensor cause other transmission-related problems?

- Yes, a faulty gear shift position sensor can cause other transmission-related issues such as harsh shifting, gear slippage, and erratic behavior of the transmission.

9. How much does it typically cost to repair OBDII code P1C9B Gear Shift Position Sensor 2 Circuit High?

- The cost of repairing code P1C9B can vary depending on the cause of the issue, but it typically ranges from $100 to $300 for parts and labor.

10. Will the check engine light turn off automatically after repairing OBDII code P1C9B?

- After repairing the underlying issue causing code P1C9B, you may need to clear the code using a diagnostic scanner to turn off the check engine light.