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Engine-Codes – Jeep – P0987 Jeep

P0987 Jeep Code - 4C Hydraulic Pressure Test

Quick Answer

The P0987 code for a Jeep relates to a 4C hydraulic pressure test. Common causes include Low transmission fluid level, Failing transmission pump, Clogged transmission filter. 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
P0987 Jeep indicates 4C Hydraulic Pressure Test.
Common causes
Common causes include Low transmission fluid level, Failing transmission pump, Clogged transmission filter.
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.
What is this?
Table of contents Created and updated by William Orellana on Aug 25, 2024
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Code P0987 Jeep Description

The P0987 code for a Jeep relates to a 4C hydraulic pressure test. This code indicates a potential issue with the hydraulic pressure within the transmission system. The hydraulic pressure is crucial for the proper operation of the transmission, as it helps to engage and disengage gears smoothly. If this pressure is not within the correct range, it can lead to issues with shifting gears, slipping gears, or even total transmission failure.

OBDII Code P0987 Jeep - 4C Hydraulic Pressure Test
P0987 Jeep Code - 4C Hydraulic Pressure Test

Common Causes of P0987 Jeep

  1. Low transmission fluid level
  2. Failing transmission pump
  3. Clogged transmission filter
  4. Malfunctioning transmission pressure control solenoid
  5. Internal transmission damage

Symptoms of P0987 Jeep

  1. Difficulty shifting gears
  2. Delayed engagement when shifting from park to drive or reverse
  3. Transmission slipping
  4. Harsh or erratic shifting
  5. Transmission overheating

How to Fix P0987 Jeep

  1. Check transmission fluid level and quality, top off or replace as needed.
  2. Inspect and potentially replace the transmission filter.
  3. Test the transmission pump and pressure control solenoid for proper function.
  4. Perform a hydraulic pressure test to identify any specific issues within the transmission.
  5. Repair or replace any damaged components as necessary.

Cost to Fix P0987 Jeep

The cost of repairing a P0987 code can vary depending on the specific cause of the issue. However, on average, the cost of addressing this code can range from $200 to $800 for parts and labor. Keep in mind that labor rates can vary, so it's a good idea to check with local auto repair shops for more accurate pricing.

When is the Code Detected?

While performing a transmission internal test the Transmission Control Module (TCM) detected that the Pressure Switch did not close 2 times

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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.

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