Error code

OBD2 P0285

OBD2P0285
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Cylinder 9 Injector Circuit Low.

Severity

moderateCan be driven, but performance may suffer. Addressing the issue is recommended.

Summary

P0285 indicates a low voltage issue with the fuel injector circuit for cylinder 9 in the powertrain system.

Symptoms

  • Engine knock or pinging
  • Reduced engine performance, especially during acceleration
  • Decreased fuel efficiency

Common Causes

  • Faulty fuel injector (cylinder 9)
  • Corroded or loose electrical connectors in the fuel injector circuit
  • Wiring harness issues between the fuel injector and control module
  • Low battery voltage affecting the entire system

Diagnosis

  1. Inspect electrical connectors and wiring for corrosion or looseness
  2. Check if the fuel injector is receiving power using a voltmeter
  3. Listen to the fuel injector for clicking sounds while the engine is running

Fixes

  • Clean or replace the faulty fuel injector

FAQ

What should I do if other codes are present along with P0285?

Check and resolve any additional codes to ensure all issues are addressed.

Can a low battery voltage cause this code?

Yes, low battery voltage can affect the entire electrical system and trigger 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 →