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Engine-Codes - Generic - P0988

P0988 - 4C Pressure Switch Sense Circuit

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

P0988 Possible Causes

What does this mean?
  • 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 is the P0988 code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

What is the cost to diagnose the P0988 code

Labor: 1.0

The cost to diagnose the P0988 code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
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Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P0988 Meaning

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.

More Information

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