AutoCodes – Jeep – P0988 Jeep

P0988 Jeep Code - 4C Pressure Switch Sense Circuit

Quick Answer

The Diagnostic Trouble Code (DTC) P0988 will set if 4C (4th clutch) pressure switch is open or closed at the wrong time in a given gear. Common causes include Faulty 4C Pressure Switch, 4C Pressure Switch harness is open or shorted, 4C Pressure Switch 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: P0988 Jeep indicates 4C Pressure Switch Sense Circuit.
Common causes: Common causes include Faulty 4C Pressure Switch, 4C Pressure Switch harness is open or shorted, 4C Pressure Switch 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 2,132

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 Dec 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0988 Jeep Description

The Diagnostic Trouble Code (DTC) P0988 will set if 4C (4th clutch) pressure switch is open or closed at the wrong time in a given gear. For example, this DTC would be set if the 4C pressure switch came on while the transmission was in second gear. The transmission system will default to an immediate shutdown routine.

OBDII Code P0988 Jeep - 4C Pressure Switch Sense Circuit - AutoCodes.com — P0988 Jeep Code - 4C Pressure Switch Sense Circuit

What does this mean?

What are the Possible Causes of the DTC P0988 Jeep?

Faulty 4C Pressure Switch
4C Pressure Switch harness is open or shorted
4C Pressure Switch circuit poor electrical connection
Open Transmission Control Relay
Faulty Transmission Control Module (TCM)

How to Fix the DTC P0988 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 P0988 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 P0988 Jeep Code

1. What does the OBDII code P0988 Jeep mean?

The OBDII code P0988 in Jeep vehicles refers to the 4C Pressure Switch Sense Circuit, indicating a problem with the transmission pressure control solenoid.

2. What are the common symptoms of OBDII code P0988 in a Jeep?

Common symptoms of code P0988 in a Jeep may include harsh shifting, transmission slippage, transmission overheating, and the vehicle going into limp mode.

3. What are the possible causes of OBDII code P0988 in a Jeep?

Possible causes of code P0988 in a Jeep include a faulty transmission pressure control solenoid, damaged wiring or connectors, low transmission fluid levels, or a malfunctioning transmission control module.

4. How serious is OBDII code P0988 in a Jeep?

Code P0988 should be addressed promptly as it can lead to transmission issues and potential damage if left unresolved. It is recommended to have the vehicle diagnosed and repaired by a qualified mechanic.

5. Can I drive my Jeep with OBDII code P0988?

Continuing to drive your Jeep with code P0988 present is not recommended, as it can cause further damage to the transmission. It is best to have the issue diagnosed and repaired as soon as possible.

6. How is OBDII code P0988 diagnosed in a Jeep?

Diagnosing code P0988 involves using a scan tool to read the code, conducting a visual inspection of the transmission components, testing the pressure control solenoid, and checking for any wiring or connector issues.

7. How can I repair OBDII code P0988 in my Jeep?

Repairing code P0988 may involve replacing the transmission pressure control solenoid, repairing or replacing damaged wiring or connectors, ensuring proper transmission fluid levels, and clearing the code from the vehicle's computer.

8. Can a DIYer fix OBDII code P0988 in a Jeep?

While some DIYers may be able to address simple causes of code P0988, such as checking transmission fluid levels, more complex issues like replacing the pressure control solenoid may require professional expertise.

9. How much does it cost to fix OBDII code P0988 in a Jeep?

The cost of repairing code P0988 in a Jeep can vary depending on the specific cause of the issue, labor costs in your area, and whether any parts need to be replaced. It is advisable to obtain quotes from different mechanics.

10. How can I prevent OBDII code P0988 from appearing in my Jeep?

To prevent code P0988 from reoccurring, it is essential to maintain your Jeep's transmission by ensuring regular fluid changes, addressing any transmission issues promptly, and following the manufacturer's recommended maintenance schedule.