AutoCodes – Jeep – P1C98 Jeep

P1C98 Jeep 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 Jeep 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 1,067

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 Jeep 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 Jeep - Gear Shift Position Sensor 1 Circuit Low - AutoCodes.com — P1C98 Jeep Code - Gear Shift Position Sensor 1 Circuit Low

What does this mean?

What are the Possible Causes of the DTC P1C98 Jeep?

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 Jeep?

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 Jeep 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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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 Jeep Code

1. What are the common symptoms of OBDII code P1C98 in a Jeep related to the Gear Shift Position Sensor 1 Circuit Low?

- Common symptoms include difficulty shifting gears, incorrect gear display on the dashboard, and the transmission getting stuck in one gear.

2. What are the possible causes of the Gear Shift Position Sensor 1 Circuit Low code (P1C98) in a Jeep?

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

3. How can I diagnose the Gear Shift Position Sensor 1 Circuit Low issue in my Jeep when the P1C98 code appears?

- Diagnose by checking the sensor's wiring and connectors for damage, testing the sensor's resistance and voltage, and scanning the transmission control module for any related fault codes.

4. What are the repair options for resolving the Gear Shift Position Sensor 1 Circuit Low fault code in a Jeep?

- Repair options include replacing the gear shift position sensor, repairing or replacing damaged wiring or connectors, or reprogramming the transmission control module.

5. Can driving with the Gear Shift Position Sensor 1 Circuit Low code (P1C98) in a Jeep cause further damage to the vehicle?

- Continuing to drive with this issue can potentially cause transmission problems, inaccurate gear shifting, and may lead to further damage to the transmission system.

6. Is it safe to continue driving my Jeep with the Gear Shift Position Sensor 1 Circuit Low fault code present?

- It is not recommended to continue driving the vehicle with this fault code as it can affect the transmission's performance and may lead to safety hazards.

7. How much does it typically cost to repair the Gear Shift Position Sensor 1 Circuit Low issue in a Jeep?

- The cost of repair can vary depending on the exact cause of the issue, but it may range from $200 to $500 for parts and labor.

8. Can I reset the OBDII code P1C98 related to the Gear Shift Position Sensor 1 Circuit Low in my Jeep by disconnecting the battery?

- Disconnecting the battery may clear the code temporarily, but it is recommended to diagnose and repair the underlying issue to prevent the code from reoccurring.

9. Will the OBDII code P1C98 related to the Gear Shift Position Sensor 1 Circuit Low reset itself after a certain number of drive cycles?

- The code may reset after several drive cycles if the underlying issue has been resolved. If the problem persists, the code will remain active until the issue is fixed.

10. Can a DIY enthusiast with basic automotive knowledge repair the Gear Shift Position Sensor 1 Circuit Low fault in a Jeep?

- While some DIYers may be able to replace the sensor or check wiring connections, diagnosing and repairing complex transmission issues may require professional expertise.