P2535 Fault Code

Ignition Switch Run/Start Position Circuit High

• What does that mean?
• Symptoms
• Causes
• Solutions

The P2535 fault code indicates a problem with the ignition switch run/start position circuit being high. This situation can disrupt the normal operation of the vehicle's ignition system, leading to issues starting or running the engine.

What are the symptoms of the P2535 code?

Symptoms related to the P2535 fault code can vary, but commonly include:

• Difficulty in starting the engine or intermittent starting issues.
• Engine stalling during operation.
• Unresponsive dashboard lights or accessories when turning the key to the run position.
• Dashboard warning lights illuminating, particularly the check engine light.

What causes the P2535 code?

This code may be triggered by one or more of the following factors:

• A faulty ignition switch that fails to properly send signals.
• Damaged wiring or connectors within the ignition circuit.
• An issue with the vehicle's powertrain control module (PCM) interpreting the ignition switch state incorrectly.
• Corrosion or poor connections that lead to high resistance in the circuit.

How to fix P2535?

To resolve the P2535 code:

• Inspect the ignition switch and connections for any visible damage or wear.
• Test the ignition switch functionality and replace it if necessary.
• Check wiring for continuity, ensuring there are no breaks or shorts.
• Clean or repair any corroded connections.
• If necessary, reprogram or replace the PCM, particularly if it is determined to be faulty.