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P0909 OBD2: Gate Select Control Error

P0909 OBD2: Gate Select Control Error

The P0909 code is an OBD-II trouble code that indicates a Gate Select Control Error. This error is generally related to the operation of manual transmission vehicles.

What Does the P0909 Code Mean?

The P0909 code signifies that the Powertrain Control Module (PCM) has detected an issue with the Shift Lever Position Sensor, which is responsible for reporting the gear selection to the engine computer.

What Causes the P0909 Code?

Several factors can trigger the P0909 code, including:

  • Failure of the shift lever assembly
  • Transmission Control Module (TCM) failure
  • Wiring issues or bad connections related to the shift lever position sensor

What Are the Symptoms of the P0909 Code?

Common symptoms associated with the P0909 code may include:

  • Inability to shift gears properly
  • Unusual noises from the transmission
  • Dashboard warning lights, particularly the check engine light

How Serious Is the P0909 Code?

The P0909 code is considered urgent, as it indicates significant malfunctions that can cause severe damage to the vehicle or pose safety risks to passengers. Immediate attention is recommended.

How to Diagnose the P0909 Code

To diagnose the P0909 code, follow these steps:

  1. Use an OBD-II scanner to confirm the P0909 code and check for any additional trouble codes.
  2. Inspect the wiring and connections to the shift lever position sensor for damage or corrosion.
  3. Test the shift lever position sensor for proper operation.
  4. Examine the shift lever assembly for any signs of failure.
  5. Evaluate the operation of the Transmission Control Module (TCM).

Common Repairs for the P0909 Code

Repairs for the P0909 code may include:

  • Replacing the shift lever position sensor
  • Repairing or replacing damaged wiring or connectors
  • Replacing the shift lever assembly
  • Repairing or replacing the Transmission Control Module (TCM)

How Much Does It Cost to Fix the P0909 Code?

The cost to fix the P0909 code can vary widely depending on the specific repairs needed. Expect to pay between $100 to $1,000 or more, depending on labor rates and parts prices in your area.

Can I Fix the P0909 Code Myself?

If you have experience with automotive repairs, you may be able to diagnose and fix the P0909 code yourself. However, due to the complexity of the transmission system and the risks associated with improper repairs, it is often advisable to consult with a professional mechanic.

About JC Landry

JC is the Senior Editor at eManualOnline.com, GarageSpot.com, and Drive-My.com, as well as the Webmaster of TheMechanicDoctor.com, only to name a few. He's been a certified Master Mechanic for 15 years, working for various car dealers and specialized repair shops before turning towards blogging about cars and EVs in the hope of helping the next generation of automotive technicians. He also loves cats, Johnny Cash and Subarus.

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