P1287 Engine Trouble Code
What is P1287?
P1287 code can indicate a faulty oxygen sensor, which may eventually damage the catalytic converter (repair cost: $2,000–$2,200). Professional diagnosis costs around $200–$210. Oxygen sensors are often straightforward to replace — check your owner's manual for location and instructions. This issue should be addressed promptly to prevent further damage.
Code Information
| Code Type: | OBD-II Powertrain (P) Trouble Code |
| System: | Powertrain |
| Code: | P1287 |
P1287 Symptoms
Check Engine Light
Illuminated dashboard warning
Engine Stalling
Engine stops unexpectedly or misfires
Performance Issues
Reduced power or acceleration
Starting Problems
Difficulty starting the engine
P1287 Code Structure
Understanding what each digit means in the P1287 powertrain trouble code:
| P | 1 | 2 | 8 | 7 |
|---|---|---|---|---|
| Powertrain Code | Fuel And Air Metering | Manifold Absolute Pressure/Barometric Pressure Circuit High Input | Ignition/Distributor Engine Speed Input Circuit Malfunction | Shift/Timing Solenoid Malfunction |
How to Fix P1287
Diagnostic Steps:
Regarding P1287, carefully inspect the wire harness near the intake manifold bracket, best accessed from below near the oil filter. Look for chafing, pinching, or damaged insulation.
Repair Solution:
Crankshaft position sensor signals the computer for precise ignition and fuel injection timing. Faulty sensors cause rough running and reduced efficiency. Modern vehicles enter limp mode and illuminate the check-engine light.
Technical Notes:
Parts or components should not be replaced based solely on P1287 DTC. Consult your vehicle service manual for proper diagnostic procedures, possible causes, and required testing before replacement.
P1287 Description
P1287 OBD-II Trouble Code: Fuel Pulse In Range But Higher Than Expected is one of the definitions for the P1287; however your vehicles manufacturer may have a different definition for the P1287 code. Please check below for your
Main Cause
The primary reason for P1287 OBD-II Engine Trouble Code is: Manifold Absolute Pressure/Barometric Pressure Circuit High Input.