Engine-Codes
 
OBDII Code List
 
P1278 CHEVROLET

P1278 CHEVROLET - Accelerator Pedal Position Sensor 1 Circuit High Voltage

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3  What does this mean?

P1278 CHEVROLET Possible Causes

  • Faulty Accelerator Pedal Position (APP)
  • Accelerator Pedal Position harness is open or shorted
  • Accelerator Pedal Position circuit poor electrical connection

How do I fix code P1278 CHEVROLET

    Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Cost of diagnosing the P1278 CHEVROLET code

    Labor: 1.0

    The cost of diagnosing the P1278 CHEVROLET code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

When is the P1278 CHEVROLET code detected?

The Engine Control Module (ECM) detected a voltage below 0.2 volts or above 4.25 volts on the APP signal

P1278 CHEVROLET Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P1278 CHEVROLET Meaning

The Accelerator Pedal Position (APP) sensors are located within the Throttle Actuator Control (TAC) module assembly. The TAC module assembly is mounted to the accelerator pedal bracket. There are 3 individual APP sensors within the TAC module. Three separate signal circuits, low reference circuits, and 5-volt reference circuits are used in order to determine the accelerator pedal position. The APP sensor signal voltages increase when the accelerator pedal is depressed.
OBDII Code P1278 CHEVROLET - Accelerator Pedal Position Sensor 1 Circuit High Voltage - Engine-Codes.com

P1278 CHEVROLET More Information

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