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 ES 350FACTORY OEM SERVICE PROCEDURE
Engine Control System - DTC P0171 - P0604
- DTC P0171, P0172, P0174, P0175: System Too Lean (Bank 1); System Too Rich (Bank 1); System Too Lean (Bank 2); System Too Rich (Bank 2)
- DTC P0300, P0301, P0302, P0303, P0304, P0305, P0306: Random/Multiple Cylinder Misfire Detected; Cylinder 1 Misfire Detected; Cylinder 2 Misfire Detected; Cylinder 3 Misfire Detected; Cylinder 4 Misfire Detected; Cylinder 5 Misfire Detected; Cylinder 6 Misfire Detected
- DTC P0327, P0328, P0332, P0333: Knock Sensor 1 Circuit Low Input (Bank 1 or Single Sensor); Knock Sensor 1 Circuit High Input (Bank 1 or Single Sensor); Knock Sensor 2 Circuit Low Input (Bank 2); Knock Sensor 2 Circuit High Input (Bank 2)
- DTC P0335, P0339: Crankshaft Position Sensor "A" Circuit; Crankshaft Position Sensor "A" Circuit Intermittent
- DTC P0340, P0342, P0343, P0345, P0347, P0348: Camshaft Position Sensor Circuit Malfunction; Camshaft Position Sensor "A" Circuit Low input (Bank 1 or Single Sensor); Camshaft Position Sensor "A" Circuit High Input (Bank 1 or Single Sensor); Camshaft Position Sensor "A" Circuit (Bank 2); Camshaft Position Sensor "A" Circuit Low Input (Bank 2); Camshaft Position Sensor "A" Circuit High Input (Bank 2)
- DTC P0351, P0352, P0353, P0354, P0355, P0356: Ignition Coil "A" Primary/Secondary Circuit; Ignition Coil "B" Primary/Secondary Circuit; Ignition Coil "C" Primary/Secondary Circuit; Ignition Coil "D" Primary/Secondary Circuit; Ignition Coil "E" Primary/Secondary Circuit; Ignition Coil "F" Primary/Secondary Circuit
- DTC P0365, P0367, P0368, P0390, P0392, P0393: Camshaft Position Sensor "B" Circuit (Bank 1); Camshaft Position Sensor "B" Circuit Low Input (Bank 1); Camshaft Position Sensor "B" Circuit High Input (Bank 1); Camshaft Position Sensor "B" Circuit (Bank 2); Camshaft Position Sensor "B" Circuit Low Input (Bank 2); Camshaft Position Sensor "B" Circuit High Input (Bank 2)
- DTC P0420, P0430: Catalyst System Efficiency Below Threshold (Bank 1); Catalyst System Efficiency Below Threshold (Bank 2)
- DTC P043E, P043F, P2401, P2402, P2419: Evaporative Emission System Reference Orifice Clog Up; Evaporative Emission System Reference Orifice High Flow; Evaporative Emission System Leak Detection Pump Control Circuit Low; Evaporative Emission System Leak Detection Pump Control Circuit High; Evaporative Emission System Switching Valve Control Circuit Low
- DTC P0441: Evaporative Emission Control System Incorrect Purge Flow
- DTC P0450, P0451, P0452, P0453: Evaporative Emission Control System Pressure Sensor/Switch; Evaporative Emission Control System Pressure Sensor Range/Performance; Evaporative Emission Control System Pressure Sensor/Switch Low Input; Evaporative Emission Control System Pressure Sensor/Switch High Input
- DTC P0455, P0456: Evaporative Emission Control System Leak Detected (Gross Leak); Evaporative Emission Control System Leak Detected (Very Small Leak)
- DTC P0500: Vehicle Speed Sensor "A"
- DTC P0504, P0724: Brake Switch "A"/"B" Correlation; Brake Switch "B" Circuit High
- DTC P0505: Idle Control System Malfunction
- DTC P050A, P050B: Cold Start Idle Air Control System Performance; Cold Start Ignition Timing Performance
- DTC P0560: System Voltage
- DTC P0604: Internal Control Module Random Access Memory (RAM) Error
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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