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.
2007 Lexus GS 450hFACTORY OEM SERVICE PROCEDURE
Engine Control System - DTC P0327 - P1235
- 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 Input (Bank 2); DTC P0333 Knock Sensor 2 Circuit High Input (Bank 2)
- DTC P0335 Crankshaft Position Sensor "A" Circuit
- DTC P0340 Camshaft Position Sensor Circuit Malfunction; DTC P0342 Camshaft Position Sensor "A" Circuit Low Input (Bank 1 or Single Sensor); DTC P0343 Camshaft Position Sensor "A" Circuit High Input (Bank 1 or Single Sensor); DTC P0345 Camshaft Position Sensor "A" Circuit (Bank 2); DTC P0347 Camshaft Position Sensor "A" Circuit Low Input (Bank 2); DTC P0348 Camshaft Position Sensor "A" Circuit High Input (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 P0355 Ignition Coil "E" Primary / Secondary Circuit; DTC P0356 Ignition Coil "F" Primary / Secondary Circuit
- DTC P0365 Camshaft Position Sensor "B" Circuit (Bank 1); DTC P0367 Camshaft Position Sensor "B" Circuit Low Input (Bank 1); DTC P0368 Camshaft Position Sensor "B" Circuit High Input (Bank 1); DTC P0390 Camshaft Position Sensor "B" Circuit (Bank 2); DTC P0392 Camshaft Position Sensor "B" Circuit Low Input (Bank 2); DTC P0393 Camshaft Position Sensor "B" Circuit High Input (Bank 2)
- DTC P0420 Catalyst System Efficiency Below Threshold (Bank 1); DTC P0430 Catalyst System Efficiency Below Threshold (Bank 2)
- DTC P043E Evaporative Emission System Reference Orifice Clog Up; DTC P043F Evaporative Emission System Reference Orifice High Flow; DTC P2401 Evaporative Emission Leak Detection Pump Stuck OFF; DTC P2402 Evaporative Emission Leak Detection Pump Stuck ON; DTC P2419 Evaporative Emission System Switching Valve Control Circuit Low
- DTC P0441 Evaporative Emission Control System Incorrect Purge Flow
- DTC P0450 Evaporative Emission Control System Pressure Sensor / Switch; DTC P0451 Evaporative Emission Control System Pressure Sensor Range / Performance; DTC P0452 Evaporative Emission Control System Pressure Sensor / Switch Low Input; DTC P0453 Evaporative Emission Control System Pressure Sensor / Switch High Input
- DTC P0505 Idle Control System Malfunction
- DTC P0560 System Voltage
- DTC P0604 Internal Control Module Random Access Memory (RAM) Error; DTC P0606 ECM / PCM Processor; DTC P0607 Control Module Performance; DTC P0657 Actuator Supply Voltage Circuit / Open
- DTC P1235 High Pressure Fuel Pump Circuit
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.