AutoCodes – Chrysler – P0988 Chrysler

P0988 Chrysler 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 Chrysler 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 862

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

What does this mean?

What are the Possible Causes of the DTC P0988 Chrysler?

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 Chrysler?

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 Chrysler 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 Chrysler Code

1. What does the OBDII code P0988 mean on a Chrysler vehicle?

P0988 indicates an issue with the 4C Pressure Switch Sense Circuit, which is part of the transmission control system responsible for monitoring hydraulic pressure.

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

Symptoms may include erratic shifting, the transmission stuck in limp mode, poor acceleration, or an illuminated check engine light.

3. What causes the P0988 code to appear in a Chrysler?

Common causes include a faulty 4C pressure switch, damaged wiring or connectors in the circuit, a malfunctioning transmission control module (TCM), or low transmission fluid.

4. Can low transmission fluid cause the P0988 code?

Yes, low or contaminated transmission fluid can cause hydraulic pressure issues and trigger the P0988 code.

5. How do you diagnose the P0988 code in a Chrysler?

Diagnosis typically involves scanning for additional codes, inspecting the wiring and connectors in the 4C Pressure Switch circuit, checking the transmission fluid level and condition, and testing the switch itself.

6. Can I drive my Chrysler with the P0988 code?

While it may be possible to drive, prolonged operation with this code can cause further transmission damage. It's best to address the issue promptly.

7. How is the P0988 code fixed in a Chrysler?

Repairs may include replacing the 4C pressure switch, repairing or replacing damaged wiring, cleaning or replacing connectors, refilling or flushing transmission fluid, or reprogramming the TCM.

8. How much does it cost to fix the P0988 code on a Chrysler?

Costs vary depending on the specific issue, but repairs can range from $100 for wiring fixes to $500 or more if the pressure switch or TCM needs replacement.

9. Can a bad transmission control module (TCM) cause the P0988 code?

Yes, a malfunctioning TCM can fail to properly interpret the 4C pressure switch signals, leading to the P0988 code.

10. How can I prevent the P0988 code from recurring?

Regular maintenance, including checking transmission fluid levels, inspecting wiring for wear, and addressing transmission issues promptly, can help prevent this code.