P0287
Cylinder 9 Contribution/Balance Fault
Moderateengine
Overview
The P0287 code indicates the engine control module has detected a cylinder 9 contribution/balance fault condition. This is an engine-related diagnostic trouble code that may indicate a mechanical or control issue affecting the engine's operation. Depending on the severity, this code may require immediate attention to prevent engine damage.
Symptoms
- Engine knocking or pinging
- Unusual engine noises
- Check Engine Light (MIL) illuminated
- Poor fuel economy
Common Causes
- Clogged oil passages
- Failed engine temperature sensor
- Low engine oil level or pressure
- Internal engine mechanical failure
Diagnosis Steps
- 1Connect an OBD-II scanner and read all stored trouble codes and freeze frame data
- 2Check engine oil level and condition; change if overdue
- 3Perform a compression and leak-down test
- 4Inspect related sensors and their wiring connections
- 5Listen for unusual engine noises indicating mechanical issues
Estimated Repair Cost
$200 — $3,000
Cost varies by vehicle, location, and repair shop. Includes parts and labor.
Commonly Affected Vehicles
Subaru WRXHonda CivicChevrolet CamaroNissan Maxima
Related Codes
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Frequently Asked Questions
Engine codes can range from minor sensor issues to critical mechanical failures. If you notice overheating, knocking, or significant power loss, stop driving and have the vehicle towed to a mechanic.