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.
2014 Subaru BRZ PremiumFACTORY OEM SERVICE PROCEDURE
Engine Control System (Diagnostics) (2 Of 4)
- DTC P0125 Insufficient Coolant Temperature for Closed Loop Fuel Control
- DTC P0128 Thermostat (Characteristic)
- DTC P0131 Oxygen Sensor Circuit Low Voltage (Bank 1 Sensor 1); DTC P0132 Oxygen Sensor Circuit High Voltage (Bank 1 Sensor 1); DTC P0134 Oxygen Sensor Circuit No Activity Detected (Bank 1 Sensor 1)
- DTC P0137 Oxygen Sensor Circuit Low Voltage (Bank 1 Sensor 2); DTC P0138 Oxygen Sensor Circuit High Voltage (Bank 1 Sensor 2); DTC P013A Oxygen Sensor System Rich →lean Response (Bank 1, Sensor 2); DTC P013B Oxygen Sensor System Lean →rich Response (Bank 1, Sensor 2); DTC P013E O2 Sensor Delayed Response - Rich to Lean (Bank 1 Sensor 2); DTC P013F O2 Sensor Delayed Response - Lean to Rich (Bank 1 Sensor 2); DTC P0140 Bank 1, Sensor 2, Oxygen Sensor (Characteristic)
- DTC P014C O2 Sensor Slow Response - Rich to Lean (Bank 1 Sensor 1); DTC P014D O2 Sensor Slow Response - Lean to Rich (Bank 1 Sensor 1); DTC P015A O2 Sensor Delayed Response - Rich to Lean (Bank 1 Sensor 1); DTC P015B O2 Sensor Delayed Response - Lean to Rich (Bank 1 Sensor 1)
- DTC P0171 System too Lean (Bank 1); DTC P0172 System Too Rich (Bank 1); DTC P1170 Fuel System Abnormal (Port); DTC P117B Fuel System Abnormal (DI)
- DTC P0191 [Fuel Rail Pressure Sensor "A" Circuit Range/Performance]; DTC P0192 Fuel Rail Pressure Sensor Circuit Low Input; DTC P0193 Fuel Rail Pressure Sensor Circuit High Input
- DTC P0196 [Engine Oil Temperature Sensor Range/Performance]; DTC P0197 Engine Oil Temperature Sensor Low; DTC P0198 Engine Oil Temperature Sensor High
- DTC P0201 Injector Circuit / Open - (Cylinder 1); DTC P0202 Injector Circuit / Open - (Cylinder 2); DTC P0203 Injector Circuit / Open - (Cylinder 3); DTC P0204 Injector Circuit / Open - (Cylinder 4)
- DTC P0230 Fuel Pump Primary Circuit
- DTC P0300 Random/Multiple Cylinder Misfire Detected; DTC P0301 Cylinder 1 Misfire Detected; DTC P0302 Cylinder 2 Misfire Detected; DTC P0303 Cylinder 3 Misfire Detected; DTC P0304 Cylinder 4 Misfire Detected
- DTC P0327 Knock Sensor 1 Circuit Low Input (Bank 1 or Single Sensor); DTC P0328 Knock Sensor 1 Circuit High Input (Bank 1 or Single Sensor); DTC P0332 Knock Sensor 2 Circuit Low (Bank 2); DTC P0333 Knock Sensor 2 Circuit High (Bank 2)
- DTC P0335 Crankshaft Position Sensor "A" Circuit; DTC P0336 Crank angle sensor characteristic
- DTC P0340 Camshaft Position Sensor "A" Circuit (Bank 1 or Single Sensor); DTC P0341 Camshaft Position Sensor "A" Circuit Range/Performance (Bank 1); DTC P0345 Camshaft Position Sensor "A" Circuit (Bank 2); DTC P0346 Camshaft Position Sensor "A" Circuit Range/Performance (Bank 2)
- DTC P0351 Ignition Coil "A" Primary/Secondary Circuit; DTC P0352 Ignition Coil "B" Primary/Secondary Circuit; DTC P0353 Ignition Coil "C" Primary/Secondary Circuit; DTC P0354 Ignition Coil "D" Primary/Secondary Circuit
- DTC P0365 Camshaft Position Sensor "B" Circuit (Bank 1); DTC P0366 Camshaft Position Sensor "B" Circuit Range/Performance (Bank 1); DTC P0390 Camshaft Position Sensor "B" Circuit (Bank 2); DTC P0391 Camshaft Position Sensor "B" Circuit Range/Performance (Bank 2)
- DTC P0420 Catalyst System Efficiency Below Threshold (Bank 1)
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.