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.
2016 Subaru WRX BaseFACTORY OEM SERVICE PROCEDURE
Engine Controls (Diagnostics) (2.0L) (2 Of 4)
- DTC P0137 O2 Sensor Circuit Low Voltage Bank 1 Sensor 2
- DTC P0138 O2 Sensor Circuit High Voltage Bank 1 Sensor 2
- DTC P013A O2 Sensor Slow Response - Rich To Lean Bank 1 Sensor 2
- DTC P013B O2 Sensor Slow Response - Lean To Rich 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 P0141 O2 Sensor Heater Circuit Bank 1 Sensor 2
- DTC P014C A/F/O2 Sensor Slow Response - Rich To Lean Bank 1 Sensor 1
- DTC P014D A/F/O2 Sensor Slow Response - Lean To Rich Bank 1 Sensor 1
- DTC P015A A/F/O2 Sensor Delayed Response - Rich To Lean Bank 1 Sensor 1
- DTC P015B A/F/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 P0191 Fuel Rail Pressure Sensor Circuit Range/Performance Bank 1
- DTC P0192 Fuel Rail Pressure Sensor Circuit Low Bank 1
- DTC P0193 Fuel Rail Pressure Sensor Circuit High Bank 1
- DTC P0196 Engine Oil Temperature Sensor "A" Range/Performance
- DTC P0197 Engine Oil Temperature Sensor "A" Circuit Low
- DTC P0198 Engine Oil Temperature Sensor "A" Circuit High
- DTC P0222 Throttle/Pedal Position Sensor/Switch "B" Circuit Low
- DTC P0223 Throttle/Pedal Position Sensor/Switch "B" Circuit High
- DTC P0230 Fuel Pump Primary Circuit
- DTC P023F Fuel Pump Secondary Circuit/Open
- DTC P0244 Turbocharger/Supercharger WASTEGATE Solenoid "A" Range/Performance
- DTC P0245 Turbocharger/Supercharger WASTEGATE Solenoid "A" Low
- DTC P0246 Turbocharger/Supercharger WASTEGATE Solenoid "A" High
- 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/Combustion Vibration Sensor 1 Circuit Low Bank 1 Or Single Sensor
- DTC P0328 Knock/Combustion Vibration Sensor 1 Circuit High Bank 1 Or Single Sensor
- DTC P0332 Knock/Combustion Vibration Sensor 2 Circuit Low Bank 2
- DTC P0333 Knock/Combustion Vibration Sensor 2 Circuit High Bank 2
- DTC P0335 Crankshaft Position Sensor "A" Circuit
- DTC P0336 Crankshaft Position Sensor "A" Circuit Range/Performance
- DTC P0340 Camshaft Position Sensor "A" Circuit Bank 1 Or Single Sensor
- DTC P0341 Camshaft Position Sensor "A" Circuit Range/Performance Bank 1 Or Single Sensor
- 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 Control Circuit/Open
- DTC P0352 Ignition Coil "B" Primary Control Circuit/Open
- DTC P0353 Ignition Coil "C" Primary Control Circuit/Open
- DTC P0354 Ignition Coil "D" Primary Control Circuit/Open
- 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 P0400 EGR "A" Flow
- 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.
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