AutoCodes
 
OBDII Code List
 
P1278 CADILLAC

P1278 CADILLAC - Accelerator Pedal Position Sensor 1 Circuit High Voltage

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3   
Comments  |  Add Comment

P1278 CADILLAC Possible Causes

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

First diagnose P1278 CADILLAC code

    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 terminals.

Cost of diagnosing the P1278 CADILLAC code

    Labor: 1.0

    The cost of diagnosing the P1278 CADILLAC code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

When is the P1278 CADILLAC code detected?

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

P1278 CADILLAC Possible Symptoms

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

P1278 Cadillac Description

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 Cadillac - Accelerator Pedal Position Sensor 1 Circuit High Voltage - AutoCodes.com

P1278 CADILLAC More Information

Need more information on how to fix the P1278 CADILLAC code?
Get Access to Factory Service Manuals

Need more help?

Get the P1278 Cadillac code diagnosed by a professional: Find a repair shop in your area

Related Information

P1278 CADILLAC Comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above help you fix the code. What are the symptoms on your vehicle for the P1278 Cadillac code? Have you replaced any parts?
Any information is appreciated. Thanks
Top ⇧