Code P1287 CADILLAC: Causes, Symptoms and Solutions
Possible Causes of Code P1287
🔧 Accelerator Pedal Position (APP) Sensor Failure
🔧 Damaged Wiring Harness (open or short circuit)
🔧 Poor Electrical Connection (corroded, broken or improperly connected connectors)
How to Fix Code P1287?
✔ Start by visually inspecting the wiring harness and associated connectors.
✔ Check the condition of electrical components, including connector pins (broken, bent or corroded).
✔ Replace defective parts if necessary.
Symptoms of Code P1287
⚠ Check Engine Light On (or “Service Engine Soon” light)
Meaning of Code P1287
Code P1287 is related to Accelerator Pedal Position (APP) sensors, which are integrated into the Throttle Actuator Control (TAC) module, located on the pedal assembly.
The system operates with three separate APP sensors, each having its own signal circuit, low reference and 5-volt reference. When the pedal is pressed, the sensor voltages increase, allowing the system to precisely calculate throttle position.
A malfunction in any of these sensors or their circuits can cause errors in vehicle acceleration management, triggering the P1287 code.
If the problem persists after inspection, using a diagnostic scanner is recommended for further analysis. 🚗🔍