What does P1275 mean on a Chevy?

P1275. Accelerator Pedal Position (APP) Sensor 1 Circuit. Applies to Silverado, Sierra, Tahoe, Suburban, Avalanche.

What causes P1275 on a Chevy?

Failed APP Sensor 1 element in the pedal assembly Open or shorted APP Sensor 1 signal wire Loose APP connector under the instrument panel Water leak dripping onto the APP connector PCM 5V reference 1 circuit fault

How do I fix P1275 on a Chevy?

Monitor APP Sensor 1 voltage sweep on a Tech2 or GDS2 Inspect the APP connector for moisture from windshield or cowl leaks Test the APP Sensor 1 signal, reference, and ground circuits end to end Wiggle-test the dash harness while holding steady pedal Replace the pedal assembly only after circuit tests pass, then clear and verify sweep

Code

P1275

Accelerator Pedal Position (APP) Sensor 1 Circuit

Category: Powertrain - Computer and Auxiliary Controls
Severity: Check Engine Light
Applies to: Silverado, Sierra, Tahoe, Suburban, Avalanche
Related: No single generic twin. See OBD Codes List

What it means

P1275. Accelerator Pedal Position (APP) Sensor 1 Circuit. This Chevy-enhanced code applies to Silverado, Sierra, Tahoe, Suburban, Avalanche.

Findings, check these first

Failed APP Sensor 1 element in the pedal assembly
Open or shorted APP Sensor 1 signal wire
Loose APP connector under the instrument panel
Water leak dripping onto the APP connector
PCM 5V reference 1 circuit fault

Standard procedure

Monitor APP Sensor 1 voltage sweep on a Tech2 or GDS2
Inspect the APP connector for moisture from windshield or cowl leaks
Test the APP Sensor 1 signal, reference, and ground circuits end to end
Wiggle-test the dash harness while holding steady pedal
Replace the pedal assembly only after circuit tests pass, then clear and verify sweep

Look up another code

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Sources and review

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Last updated 2026-09-13.

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