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P2535 OBD2: Ignition Switch Run/Start Position Circuit High

P2535 OBD2: Ignition Switch Run/Start Position Circuit High

The P2535 OBD-II code indicates a malfunction within the ignition switch run/start position circuit. This code is crucial as it can affect the vehicle’s ability to start and run properly.

What Does the P2535 Code Mean?

The P2535 code is triggered when the Transmission Control Module (TCM) detects that the voltage from the ignition switch is too high. This can lead to issues with the vehicle’s electrical systems and may prevent the transmission from shifting appropriately.

What Causes the P2535 Code?

There are several potential causes for the P2535 code, including:

  • Ignition switch failure
  • Transmission Control Module (TCM) failure
  • Wiring issues related to the ignition switch

What Are the Symptoms of the P2535 Code?

The primary symptom associated with the P2535 code is that the transmission may not shift properly. This can lead to poor vehicle performance and drivability issues.

How Serious Is the P2535 Code?

The P2535 code is considered urgent and should be addressed immediately. Ignoring this code can lead to significant damage to the vehicle, as well as pose safety risks to the driver and passengers.

How to Diagnose the P2535 Code

To diagnose the P2535 code, a mechanic will typically perform the following steps:

  • Use an OBD-II scanner to confirm the code and check for any additional codes.
  • Inspect the ignition switch and TCM for any visible signs of damage or wear.
  • Test the ignition switch and associated wiring for proper voltage and continuity.
  • Evaluate the TCM functionality to determine if it is functioning correctly.

Common Repairs for the P2535 Code

Repairs for the P2535 code may include:

  • Replacing the ignition switch
  • Repairing or replacing damaged wiring
  • Replacing the Transmission Control Module (if found to be faulty)

How Much Does It Cost to Fix the P2535 Code?

The cost to fix the P2535 code can vary widely depending on the specific issue. Replacing the ignition switch may cost between $100 and $300, while replacing the TCM can be significantly more expensive, often exceeding $1,000, including parts and labor.

Can I Fix the P2535 Code Myself?

While some experienced DIYers may be able to replace the ignition switch or inspect the wiring, it is generally recommended to seek professional assistance for diagnosing and repairing issues related to the P2535 code. Proper diagnosis is crucial to avoid unnecessary repairs and ensure the vehicle’s safety and functionality.

About JC Landry

JC spent 15+ years as a certified Master Mechanic before trading the shop for the keyboard. He's worked across dealerships, owned and operated his own independent garage, and consulted on automotive trade school curricula, reviewing technical textbooks used in vocational programs. He now serves as Editor-in-Chief at eManualOnline.com, where he oversees the platform's technical content. He's one of the few voices in automotive publishing who has actually turned wrenches professionally on the vehicles he covers. He didn't learn automotive repair to write about it. He learned to write after spending over a decade doing it.

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