1991 Subaru Justy BaseFACTORY OEM SERVICE PROCEDURE

Trouble Code Identification

TROUBLE CODE IDENTIFICATION

Code Circuit Affected Probable Cause
14  Duty Solenoid (Fuel Control) Open/Short Circuit
15  Coasting Fuel-Cut (CFC) System Open/Short Circuit
16  Feedback System D-CHECK Improperly Performed
17  Fuel Pump & Automatic Choke Unit Failure
21  Coolant Temperature Sensor Open/Short Circuit
22  VLC Solenoid Valve (1) Open/Short Circuit
23  Pressure Sensor Open or Shorted Test Solenoid Valve
24  Idle-Up Solenoid Valve Open/Short Circuit
25  Float Chamber Vent Sol. Valve Open/Short Circuit
32  Oxygen (O2) Sensor Open/Short Circuit Or Defective Sensor
33  Vehicle Speed Sensor (VSS) Faulty Sensor Or Control Unit
34  EGR Solenoid Open/Short Circuit Or Defective Valve
35  Canister Purge Control Solenoid Open/Short Ckt Or Faulty Valve
41  Feedback Carb System (Calif. Only) Mechanical Fault
46  Radiator Fan Control Fan Motor, Relay, Open/Short Circuit
52  Clutch Switch Open/Short Circuit
53  High Altitude Compensator Valve Open/Short Ckt Or Faulty Valve
55  EGR Sensor Open/Short Ckt Or Faulty Sensor
62  Idle-Up System Faulty Headlight/Defogger Switch
63  Idle-Up System Faulty Fan/Radiator Switch
(1) Vacuum/Pressure Sensor Line Control (VLC) solenoid valve.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.