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All codes/P2A36

P2A36

AFCM Power Relay Sense Circuit Low

High severity

The sense feedback voltage from the AFCM power relay is below the expected window. Indicates the relay output stays low when the relay is commanded on.

The sense feedback voltage from the AFCM power relay is below the expected window. Indicates the relay output stays low when the relay is commanded on.

Common causes

  • Relay contact stays open

    One of the most commonly reported causes for this code — check this first.

    high

    Typical part cost: $130-660

  • Feedback wire shorted to ground

    A plausible cause — test and verify before replacing parts.

    medium

    Typical part cost: $130-660

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First things to check

  1. 1Confirm the code with a scan tool and check for additional related codes.
  2. 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.

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Related codes

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Frequently asked questions

What does P2A36 mean?

P2A36 means "AFCM Power Relay Sense Circuit Low". It is a generic OBD-II code that points to a fault in the auxiliary emission controls.

What are the most common causes of P2A36?

relay contact stays open; feedback wire shorted to ground; connector pins corroded - high contact resistance — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.

Can I keep driving with this code?

This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly. Use the Wrenchify app for a full diagnosis specific to your vehicle.

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