Engine-CodesDodge – P0987 Dodge

P0987 Dodge Code - 4C Hydraulic Pressure Test

Quick Answer

The P0987 code for Dodge vehicles refers to a 4C hydraulic pressure test. Common causes include Low transmission fluid level or dirty fluid, Malfunctioning 4C solenoid, Faulty wiring or connectors in the 4C circuit. 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 Dodge indicates 4C Hydraulic Pressure Test.
Common causes
Common causes include Low transmission fluid level or dirty fluid, Malfunctioning 4C solenoid, Faulty wiring or connectors in the 4C circuit.
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.
Table of contents Created and updated by William Orellana on Aug 30, 2024
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Code P0987 Dodge Description

The P0987 code for Dodge vehicles refers to a 4C hydraulic pressure test. This code indicates that there is an issue with the hydraulic pressure within the transmission system, specifically related to the 4C (4th clutch) circuit. The 4th clutch is responsible for engaging and disengaging specific gear ratios in the transmission, so any problems with the hydraulic pressure in this circuit can lead to shifting issues, poor performance, and potential damage to the transmission system.

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

Common Causes of P0987 Dodge

  1. Low transmission fluid level or dirty fluid
  2. Malfunctioning 4C solenoid
  3. Faulty wiring or connectors in the 4C circuit
  4. Internal transmission damage or wear
  5. Malfunctioning transmission control module (TCM)

Symptoms of P0987 Dodge

  1. Harsh or delayed shifting
  2. Slipping gears
  3. Decreased fuel efficiency
  4. Transmission overheating
  5. Illuminated check engine light

How to Fix P0987 Dodge

  1. Check and top off transmission fluid levels, replace if dirty.
  2. Inspect and replace the 4C solenoid if faulty.
  3. Check wiring and connectors in the 4C circuit for damage or corrosion, repair as needed.
  4. Perform a thorough inspection of the transmission for any internal damage or wear, repair or replace components as necessary.
  5. Test and potentially replace the transmission control module (TCM) if deemed faulty.

Cost to Fix P0987 Dodge

The cost for repairing a P0987 code can vary depending on the specific issue causing the code and the labor rates of the auto repair shop. In general, the repair costs for this type of transmission issue can range from $200 to $800, including parts and labor. However, it's important to note that prices can fluctuate based on the severity of the problem and the need for any replacement parts. Additionally, diagnosis time and labor rates at auto repair shops can vary, so it's recommended to obtain quotes from local shops for a more accurate estimate.

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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