AutoCodes – Generic – P1C98

P1C98 Code - Gear Shift Position Sensor 1 Circuit Low

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 1, Gear Shift Position Sensor 1 harness is open or shorted, Gear Shift Position Sensor 1 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: P1C98 indicates Gear Shift Position Sensor 1 Circuit Low.
Common causes: Common causes include Faulty Gear Shift Position Sensor 1, Gear Shift Position Sensor 1 harness is open or shorted, Gear Shift Position Sensor 1 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 2,233

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 P1C98 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 1st - 3rd 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 P1C98 - Gear Shift Position Sensor 1 Circuit Low - AutoCodes.com — P1C98 Code - Gear Shift Position Sensor 1 Circuit Low

What does this mean?

What are the Possible Causes of the DTC P1C98?

Faulty Gear Shift Position Sensor 1
Gear Shift Position Sensor 1 harness is open or shorted
Gear Shift Position Sensor 1 circuit poor electrical connection
Faulty Transmission Control Module (TCM)

How to Fix the DTC P1C98?

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 P1C98 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

P1C98 Chrysler — Gear Shift Position Sensor 1 Circuit Low
P1C98 Dodge — Gear Shift Position Sensor 1 Circuit Low
P1C98 Fiat — Gear Shift Position Sensor 1 Circuit Low
P1C98 Jeep — Gear Shift Position Sensor 1 Circuit Low

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 P1C98 Code

1. What are the common symptoms of OBDII code P1C98 (Gear Shift Position Sensor 1 Circuit Low)?

- Common symptoms include difficulty shifting gears, inaccurate gear display on the dashboard, and in some cases, the vehicle may not start.

2. What are the possible causes of OBDII code P1C98?

- The code P1C98 can be triggered by a faulty gear shift position sensor, damaged wiring or connectors related to the sensor, or a malfunctioning transmission control module.

3. How can I diagnose the cause of OBDII code P1C98?

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

4. Can I drive my vehicle with OBDII code P1C98 present?

- It is not recommended to drive your vehicle with code P1C98 as it can lead to further transmission problems and potential safety hazards. It's best to address the issue promptly.

5. How can I repair OBDII code P1C98?

- Repairing code P1C98 may involve replacing the faulty gear shift position sensor, repairing or replacing damaged wiring or connectors, and clearing the code with a scan tool after the repair is completed.

6. Is it necessary to reset the OBDII code P1C98 after repairing the issue?

- Yes, it is important to clear the code P1C98 using a scan tool after repairing the underlying problem. This will reset the check engine light and ensure the issue has been resolved.

7. Can a DIY enthusiast fix OBDII code P1C98 at home?

- Depending on your mechanical skills and access to tools, you may be able to address code P1C98 at home. However, if you are unsure about the diagnosis or repair process, it's best to consult a professional mechanic.

8. What are some preventive maintenance tips to avoid OBDII code P1C98 in the future?

- Regularly inspecting and maintaining your vehicle's transmission components, checking for any signs of wear or damage, and addressing any issues promptly can help prevent code P1C98 and other related problems.

9. Will OBDII code P1C98 cause permanent damage to my vehicle if left unresolved?

- Ignoring OBDII code P1C98 can potentially lead to further damage to the transmission components over time. It's best to address the issue promptly to avoid costly repairs in the future.

10. How long does it typically take to repair OBDII code P1C98?

- The repair time for OBDII code P1C98 can vary depending on the exact cause of the issue and the complexity of the repair. In general, it may take a few hours to a day to diagnose and fix the problem.