P2537 Fault Code

Ignition Switch Accessory Position Circuit Low

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

• The P2537 fault code indicates an issue with the ignition switch's accessory position circuit being at a low voltage. This component is crucial for controlling electrical accessories when the vehicle is in the 'accessory' position.
• It typically suggests a malfunction within the ignition switch, wiring, or electrical connectors related to the circuit.
• A malfunction in this area can affect the operation of various electrical components, leading to various performance issues.

What are the symptoms of the P2537 code?

• Symptoms associated with the P2537 code may include:
  • Inability to start the engine or intermittent starting issues.
  • Electrical systems malfunctioning while in the accessory position, such as radio or dashboard lights.
  • Illuminated check engine light or other warning lights on the dashboard.
  • Poor performance of accessories when using the ignition switch.

What causes the P2537 code?

• Common causes for the P2537 code include:
  • Defective ignition switch causing improper voltage output.
  • Faulty wiring or corroded connectors disrupting the circuit.
  • Poor battery connection affecting power distribution.
  • Issues with the vehicle's ECU misinterpreting the circuit status.

How to fix P2537?

• To resolve the P2537 fault code, consider the following steps:
  • Inspect and test the ignition switch for proper operation and voltage output.
  • Check wiring and connectors for damage, corrosion, or loose connections, and repair as necessary.
  • Ensure the vehicle's battery is in good condition and clean the terminals.
  • If no issues are found, reset the fault code and conduct tests to see if it reoccurs.