P2537 OBD-II: Ignition Switch Accessory Position Circuit Low

OBD II Fault Code

• OBD II P2537

OBD-II Code Transmission may not shift properly is defined as a Ignition Switch Accessory Position Circuit Low

When the vehicle is turned on, battery voltage is sent to all the electrical systems on the vehicle. The Transmission Control Module monitors this voltage to make sure it is correct. If the Transmission Control Module detects the voltage is too low, code P2537 will set.

Transmission may not shift properly Symptoms

• Transmission may not shift properly

Common Problems That Trigger the P2537 Code

• Ignition switch failure
• Transmission Control Module (TCM) failure
• Wiring issue

Common Repairs Needed for the P2537 Code

• Ignition Switch Replacement (Electrical)