Error code

OBD2 P0287

OBD2P0287
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Cylinder 9 Contribution/Balance.

Severity

moderateCan drive but may experience reduced performance and efficiency.

Summary

P0287 indicates that cylinder #9 is not contributing properly to the engine's balance and efficiency. This issue can be detected by the Engine Control Module (ECM) through monitoring the crankshaft position sensor.

Symptoms

  • Reduced engine performance
  • Decreased fuel economy
  • Rough idle

Common Causes

  • Dirty or clogged fuel injectors
  • Improper replacement of fuel injectors without proper learning procedure
  • Mechanical issues such as worn rings, burnt valves, or leaking head gasket

Diagnosis

  1. Check fuel injector connectors for corrosion or water damage.
  2. Use a digital oscilloscope to compare signals between the suspected fuel injector and its neighbors.
  3. Perform cylinder compression and leakdown tests to identify mechanical issues.

Fixes

  • Clean or replace dirty/clogged fuel injectors

FAQ

What does P0287 mean?

P0287 indicates that cylinder #9 is not contributing properly to the engine's balance and efficiency.

How do I fix P0287?

Cleaning or replacing dirty/clogged fuel injectors, performing a proper learning procedure after injector replacement, and addressing mechanical issues like worn rings or valves can resolve this code.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

More OBD2 codes

All OBD2 codes →Search more codes →