AutoCodesGeneric – P0900

P0900 Code - Clutch Actuator Circuit/Open

Quick Answer

The clutch actuator is operated by the Transmission Control Module (TCM) and engages and disengages the clutch by the clutch master cylinder movement of the clutch actuator. Common causes include Faulty Clutch Actuator, Clutch Actuator harness is open or shorted, Clutch Actuator 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
P0900 indicates Clutch Actuator Circuit/Open.
Common causes
Common causes include Faulty Clutch Actuator, Clutch Actuator harness is open or shorted, Clutch Actuator 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 27,198
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on May 11, 2019
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Code P0900 Description

The clutch actuator is operated by the Transmission Control Module (TCM) and engages and disengages the clutch by the clutch master cylinder movement of the clutch actuator. An electric motor moves the clutch master cylinder, and the clutch stroke sensor, which is mounted on the clutch actuator assembly, detects the clutch master cylinder position. The TCM monitors the electrical current and clutch motor output terminal voltage, and detects malfunctions in the clutch motor circuit.
OBDII Code P0900 - Clutch Actuator Circuit/Open - AutoCodes.com
P0900 Code - Clutch Actuator Circuit/Open

What are the Possible Causes of the DTC P0900?

  • Faulty Clutch Actuator
  • Clutch Actuator harness is open or shorted
  • Clutch Actuator circuit poor electrical connection

How to Fix the DTC P0900?

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 P0900 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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Information for Specific Makes

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 P0900 Code

1. What does the OBDII code P0900 mean?

P0900 indicates an issue with the clutch actuator circuit, specifically an open or disconnected circuit.

2. What are common symptoms of code P0900?

Symptoms may include difficulty shifting gears, transmission stuck in one gear, reduced performance, or an illuminated check engine light.

3. What causes the P0900 code to appear?

Common causes include damaged wiring, loose or corroded connections, faulty clutch actuator, or problems with the transmission control module (TCM).

4. Can I drive my vehicle with a P0900 code?

Driving with this code is not recommended, as the transmission may not function properly, leading to unsafe driving conditions.

5. How do I diagnose code P0900?

Start by inspecting the clutch actuator wiring and connections for damage or corrosion, then test the actuator and the transmission control module for proper function.

6. How is the P0900 code fixed?

Repairs may include replacing damaged wiring, reconnecting loose connections, repairing or replacing the clutch actuator, or reprogramming/replacing the TCM.

7. How much does it cost to repair a P0900 code?

Costs vary depending on the root cause, ranging from $50 for wiring repairs to several hundred dollars for a new clutch actuator or TCM.

8. Can a dead battery cause the P0900 code?

A weak or dead battery can cause electrical issues, potentially leading to the P0900 code if the clutch actuator circuit is affected.

9. Will clearing the code fix the problem?

Clearing the code may temporarily remove the check engine light, but it won’t fix the underlying issue causing the P0900 code.

10. Is the P0900 code related to manual or automatic transmissions?

The P0900 code is typically associated with automated manual or dual-clutch transmissions that use a clutch actuator.

Discuss the causes and fixes for P0900 OBDII Code

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