Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSSUBARU2014FORESTER 2.5I PREMIUM, ENG CD FB25BC, AUTOMATIC CVT TRANSREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROL SYSTEM (DIAGNOSTICS) (H4DO)DRIVE CYCLEPROCEDUREDRIVE CYCLE ANOTES
2014 Subaru Forester 2.5i Premium, Eng CD FB25BC, Automatic CVT Trans
Drive Cycle A: Notes
2014 Subaru Forester 2.5i Premium, Eng CD FB25BC, Automatic CVT TransSECTION Notes
| DTC | Item | Condition |
|---|---|---|
| P0125 | Insufficient Coolant Temperature for Closed Loop Fuel Control | «Coolant Temp.» at engine start: Less than 15°C (5°F) |
| P0128 | Coolant Thermostat (Engine Coolant Temperature Below Thermostat Regulating Temperature) | - |
| P0141 | O2 Sensor Heater Circuit (Bank1 Sensor2) | - |
| P014C | O2 Sensor Slow Response - Rich to Lean (Bank 1 Sensor 1) | - |
| P014D | O2 Sensor Slow Response - Lean to Rich (Bank 1 Sensor 1) | - |
| P015A | O2 Sensor Delayed Response - Rich to Lean (Bank 1 Sensor 1) | - |
| P015B | O2 Sensor Delayed Response - Lean to Rich (Bank 1 Sensor 1) | - |
| P0171 | System Too Lean (Bank 1) | Complete diagnosis with drive cycle B or C as well. |
| P0172 | System Too Rich (Bank 1) | Complete diagnosis with drive cycle B or C as well. |
| P0196 | Engine Oil Temperature Sensor Circuit Range/Performance | «Oil Temperature» at engine start: Less than 40°C (104°F) |
| P0300 | Random/Multiple Cylinder Misfire Detected | Complete diagnosis with drive cycle B or C as well. |
| P0301 | Cylinder 1 Misfire Detected | Complete diagnosis with drive cycle B or C as well. |
| P0302 | Cylinder 2 Misfire Detected | Complete diagnosis with drive cycle B or C as well. |
| P0303 | Cylinder 3 Misfire Detected | Complete diagnosis with drive cycle B or C as well. |
| P0304 | Cylinder 4 Misfire Detected | Complete diagnosis with drive cycle B or C as well. |
| P0420 | Catalyst System Efficiency Below Threshold (Bank 1) | - |
| P0459 | Evaporative Emission System Purge Control Valve Circuit High | - |
| P2096 | Post Catalyst Fuel Trim System Too Lean (Bank 1) | Complete diagnosis with drive cycle B or C as well. |
| P2097 | Post Catalyst Fuel Trim System Too Rich (Bank 1) | Complete diagnosis with drive cycle B or C as well. |
| P2195 | O2 Sensor Signal Biased/Stuck Lean (Bank 1 Sensor 1) | - |
| P2196 | O2 Sensor Signal Biased/Stuck Rich (Bank 1 Sensor 1) | - |
RENDER: 1.0x
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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.