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.
2003 Lexus RX 300 FWDFACTORY OEM SERVICE PROCEDURE
Engine Performance DTCS
ENGINE PERFORMANCE DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC | Description |
|---|---|
| P0010 | Camshaft Position "A" Actuator Circuit (Bank 1) |
| P0011 | Camshaft Position "A" Timing Over Advanced Or System Performance (Bank 1) |
| P0012 | Camshaft Position "A", Timing Over, Retarded (Bank 1) |
| P0016 | Crankshaft Position, Camshaft Position Correction (Bank 1, Sensor A) |
| P0018 | Crankshaft Position, Camshaft Position Correction (Bank 2, Sensor A) |
| P0020 | Camshaft Position "A" Actuator Circuit (Bank 2) |
| P0021 | Camshaft Position "A", Timing Over, Advanced Or System Performance (Bank 2) |
| P0022 | Camshaft Position "A", Timing Over, Retarded (Bank 2) |
| P0036 | Oxygen Sensor Heater Control Circuit (Bank 1, Sensor 2) |
| P0100 | Mass Airflow (MAF) Sensor Circuit |
| P0101 | Mass Airflow (MAF) Sensor Circuit Range/Performance Fault |
| P0110 | Intake Air Temperature (IAT) Sensor Circuit |
| P0115 | Engine Coolant Temperature (ECT) Sensor Circuit |
| P0116 | Engine Coolant Temperature (ECT) Sensor Circuit Range/Performance Fault |
| P0120 | Throttle (TP)/Pedal Position Sensor Switch "A" Circuit Malfunction |
| P0121 | Throttle (TP)/Pedal Position Sensor Switch "A" Circuit Range/Performance Fault |
| P0125 | Insufficient Coolant Temperature For Closed Loop Fuel Control |
| P0128 | Thermostat Malfunction |
| P0134 | Oxygen (A/F) Sensor Circuit No Activity Detected (Bank 1, Sensor 1) |
| P0135 | Oxygen (A/F) Sensor Heater Circuit (Bank 1, Sensor 1) |
| P0136 | Heated Oxygen Sensor Circuit Fault (Bank 1 Sensor 2) |
| P0154 | Oxygen (A/F) Sensor Circuit No Activity Detected (Bank 2, Sensor 1) |
| P0155 | Oxygen (A/F) Sensor Heater Circuit (Bank 2, Sensor 1) |
| P0171 | System Too Lean (Fuel Trim - Bank 1) |
| P0172 | System Too Rich (Fuel Trim - Bank 1) |
| P0174 | System Too Lean (Fuel Trim - Bank 2) |
| P0175 | System Too Rich (Fuel Trim - Bank 2) |
| P0300 | Random Cylinder Misfire Detected |
| P0301-P0306 | Cylinders No. 1-6 Misfire Detected |
| P0325 | Knock Sensor 1 Circuit |
| P0330 | Knock Sensor 2 Circuit |
| P0335 | Crankshaft Position (CKP) Sensor "A" Circuit |
| P0339 | Crankshaft Position Sensor "A" Circuit Intermittent |
| P0340 | Camshaft Position Sensor "A" Circuit (Bank 1 Or Single Sensor) |
| P0341 | Camshaft Position Sensor "A" Circuit Range/Performance (Bank 1 Or Single Sensor) |
| P0345 | Camshaft Position Sensor "A" Circuit (Bank 2) |
| P0346 | Camshaft Position Sensor "A" Circuit Range/Performance (Bank 2) |
| P0351 | Ignition Coil "A" Primary/Secondary Circuit |
| P0352 | Ignition Coil "B" Primary/Secondary Circuit |
| P0353 | Ignition Coil "C" Primary/Secondary Circuit |
| P0354 | Ignition Coil "D" Primary/Secondary Circuit |
| P0355 | Ignition Coil "E" Primary/Secondary Circuit |
| P0356 | Ignition Coil "F" Primary/Secondary Circuit |
| P0420 | Catalyst System Efficiency Below Threshold |
| P0441 | Incorrect EVAP Purge Flow |
| P0442 | EVAP System Small Leak Detected |
| P0446 | EVAP Vent Control Fault |
| P0451 | EVAP Pressure Sensor Range/Performance Fault |
| P0456 | Evaporative Emission Control System Leak Detected (Very Small Leak) |
| P0500 | Vehicle Speed Sensor (VSS) Malfunction |
| P0505 | Idle Control System Malfunction |
| P0511 | Idle Air Control Circuit |
| P0560 | System Voltage |
| P2195 | Oxygen (A/F) Sensor Signal Stuck Lean (Bank 1, Sensor 1) |
| P2196 | Oxygen (A/F) Sensor Signal Stuck Rich (Bank 1, Sensor 1) |
| P2197 | Oxygen (A/F) Sensor Signal Stuck Lean (Bank 2, Sensor 1) |
| P2198 | Oxygen (A/F) Sensor Signal Stuck Rich (Bank 2, Sensor 1) |
| P2237 | Oxygen Sensor Pumping Current Circuit/Open (For A/F Sensor) (Bank 1, Sensor 1) |
| P2240 | Oxygen Sensor Pumping Current Circuit/Open (For A/F Sensor) (Bank 2, Sensor 1) |
| P2A00 | A/F Sensor Circuit Slow Response (Bank 1, Sensor 1) |
| P2A03 | A/F Sensor Circuit Slow Response (Bank 2, Sensor 1) |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.