Lexus Code Retrieval

The check engine warning light will come on when the ignition switch is turned On and the engine is not running. When the engine is started, the check engine warning light should go off. If light remains on, the self-diagnosis system has detected a fault in the system.

1. Battery voltage must be 11 volts or more. Throttle valve must be fully closed. Transmission must be in Neutral position. All accessories must be turned Off.
2. On pre-OBD II models, turn ignition to On, then use a jumper wire to connect terminals TE1 and El of the data link connector, located under the left hand side of the instrument panel. Codes are indicated by the number of flashes of the check engine warning light. On models with OBD II, utilize an OBDII scan tool , then connect to data link connector (DLC). Turn ignition and scan tool to On, and write down any codes and "freeze-frame data" that appear.

If the ECU has detected a system malfunction, the check engine light will blink every .5 second. The first number of blinks will equal the first digit of a two digit diagnostic trouble code and after a 1.5 second pause, the second number of blinks will equal the second digit of same diagnostic trouble code. If there are two or more DTC's, there will be a 2.5 second pause between each. After all DTC's have been output there will be a 4.5 second pause and all DTC's will be repeated as long as the terminals TE1 and El of the data link connector are connected. In the event of two or more DTC's, indication will begin from smaller numbered code and continue in order to the larger. After all DTC have been recorded, remove jumper wire.

After service, the diagnostic trouble code or DTC's retained in the ECU memory must be cleared by remove the EFI fuse for approximately 10 seconds or more, depending on ambient temperature (the lower the temperature, the longer the fuse must be left out) with the ignition switch off. The OBD II scan tool has a feature to clear DTC's. Refer to the manufacturer's manual for procedures. DTC clearing can also be done by removing the battery ground cable, other memory systems (clock) will also be cleared. If the diagnostic trouble code is not cleared, it will be retained by the ECU and appear along with a new DTC in future trouble codes. If it is necessary to work on engine components requiring removal of the battery ground cable, confirm no DTC's are stored. After clearing codes, road test the vehicle to check that a normal operation. If the same diagnostic trouble code appears, the trouble has not been corrected.
Without OBD2

12
RPM Signal
13
RPM Signal
14
Ignition Signal
15
Ignition Signal
16
Electronically Controlled Transmission Control Signal
17
CMP No. 1
18
CMP No. 2
21
Main O2S & Heater Signal
22
ECT Sensor Signal
24
IAT Sensor Signal
25
Air–Fuel Ratio Lean Malfunction
26
Air–Fuel Ratio Rich Malfunction
27
Sub O2S Signal
28
Main O2S
29
Sub O2S
31 & 32
Air Flow Meter Signal
35
HAC/Barometric Pressure Sensor Signal
41
TP Sensor Signal
42
VSS Signal
43
Starter Signal
47
Sub TP Sensor
48
Secondary Injection System Malfunction
51
Switch Condition Signal
52
KS Signal
53
Knock Control Signal
55
KS Signal
70
EGR System Malfunction
71
EGR System Malfunction
78
Fuel Pump Control
With OBD2

P0100
MAF Malfunction
P0101
MAF Circuit Range/Performance
P0110
IAT Circuit Malfunction
P0115
ECT Circuit Malfunction
P0116
ECT Circuit Range/Performance
P0120
TP Position Sensor/Switch ‘‘A’’ Circuit Malfunction
P0121
TP Position Sensor/Switch ‘‘A’’ Circuit Range/Performance
P0125
Insufficient Coolant Temperature For Closed Loop Fuel Control
P0130
HO2S Circuit Malfunction, Bank 1 Sensor 1
P0133
HO2S Circuit Slow Response, Bank 1 Sensor 1
P0135
HO2S Heater Circuit Malfunction, Bank 1 Sensor 1
P0136
HO2S Circuit Malfunction, Bank 1 Sensor 2
P0141
HO2S Heater Circuit Malfunction, Bank 1 Sensor 2
P0150
HO2S Circuit Malfunction, Bank 2 Sensor 1
P0153
HO2S Circuit Slow Response, Bank 2 Sensor 1
P0155
HO2S Heater Circuit Malfunction, Bank 2 Sensor 1
P0156
HO2S Sensor Circuit Malfunction, Bank 2 Sensor 2
P0161
HO2S Heater Circuit Malfunction, Bank 2 Sensor 2
P0170
Fuel Trim Malfunction
P0171
System Too Lean (Fuel Trim)
P0172
System Too Rich (Fuel Trim)
P0174
System Too Lean (A/F Lean Malfunction, Bank 2)
P0175
System Too Rich (A/F Rich Malfunction, Bank 2)
P0300
Random Misfire Detected
P0301
Misfire Detected, Cylinder 1
P0302
Misfire Detected, Cylinder 2
P0303
Misfire Detected, Cylinder 3
P0304
Misfire Detected, Cylinder 4
P0305
Misfire Detected, Cylinder 5
P0306
Misfire Detected, Cylinder 6
P0307
Misfire Detected, Cylinder 7
P0308
Misfire Detected, Cylinder 8
P0325
KS 1 Circuit Malfunction
P0330
KS 2 Circuit Malfunction
P0335
CKP Sensor ‘‘A’’ Circuit Malfunction
P0340
CMP Circuit Malfunction
P0385
CKP Sensor ‘‘B’’ Circuit Malfunction
P0401
EGR Insufficient Flow
P0402
EGR Excessive Flow
P0403
EGR Circuit Malfunction
P0420
Catalyst System Efficiency Below Threshold Bank 1
P0430
Catalyst System Efficiency Below Threshold Bank 2
P0440
EVAP Emission Control System Malfunction
P0441
EVAP Emission Control System Improper Purge Flow
P0446
EVAP Emission Control System Vent Control Malfunction
P0450
EVAP Emission Control System Pressure Switch Malfunction
P0451
EVAP Control System Pressure Sensor Range/Performance
P0500
VSS Malfunction
P0505
Idle Control System Malfunction
P0510
Closed TP Switch Malfunction
P0550
Power Steering Pressure Sensor Circuit Malfunction
P1100
BARO Sensor Circuit Malfunction
P1120
Accelerator Pedal Position Sensor Circuit Malfunction
P1121
Accelerator Pedal Position Sensor Range/Performance Problem
P1125
Throttle Control Motor Circuit Malfunction
P1126
Magnetic Clutch Circuit Malfunction
P1127
ECTS Actuator Power Source Circuit Malfunction
P1128
Throttle Control Motor Lock Malfunction
P1129
Electronic Throttle Control System
P1130
Air/Fuel Ratio Sensor Circuit Range/Performance Malfunction (Bank 1 Sensor 1)
P1133
Air/Fuel Ratio Sensor Circuit Response Malfunction (Bank 1 Sensor 1)
P1135
Air/Fuel Ratio Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)
P1150
Air/Fuel Ratio Sensor Circuit Range/Performance Malfunction (Bank 2 Sensor 1)
P1153
Air/Fuel Ratio Sensor Circuit Response Malfunction (Bank 2 Sensor 1)
P1155
Air/Fuel Ratio Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)
P1200
Fuel Pump Relay/ECU Circuit Malfunction
P1300
Igniter Circuit Malfunction (Bank 1 Or No. 1)
P1305
Igniter Circuit Malfunction, (Bank 2 Or No. 2)
P1310
Igniter Circuit Malfunction (No. 3)
P1315
Igniter Circuit Malfunction (No. 4)
P1320
Igniter Circuit Malfunction (No. 5)
P1325
Igniter Circuit Malfunction (No. 6)
P1330
Igniter Circuit Malfunction (No. 7)
P1335
CKP Sensor Circuit Malfunction During Engine Running
P1340
Igniter Circuit Malfunction (No. 8)
P1345
VVT Sensor Circuit Malfunction (Bank 1)
P1346
VVT Sensor Rang/Performance Problem (Bank 1)
P1349
VVT System Malfunction (Bank 1)
P1350
VVT Sensor Circuit Malfunction (Bank 2)
P1351
VVT Sensor Range/Performance Problem (Bank 2)
P1354
VVT System Malfunction (Bank 2)
P1400
Sub-TP Sensor Malfunction
P1401
Sub-TP Sensor Range/Performance
P1410
EGR Valve Position Sensor Circuit Malfunction
P1411
EGR Valve Position Sensor Circuit Range/Performance Malfunction
P1500
Starter Signal Circuit Malfunction
P1520
Stop Lamp Switch Malfunction
P1565
Cruise Control Main Switch Circuit Malfunction
P1566
Cruise Control Main Switch Circuit Malfunction
P1600
ECM BATT Malfunction
P1605
Knock Control CPU Malfunction
P1633
ECM Malfunction (ETCS Circuit)
P1645
Body ECU Malfunction
P1656
OCV Circuit Malfunction (Bank 1)
P1663
OCV Circuit Malfunction (Bank 2)
P1780
PNP Switch Malfunction
B2785
Ignition Switch On Malfunction (Immobilizer System)
B2786
Ignition Switch Off Malfunction (Immobilizer System)
B2785
Ignition Switch On Malfunction (Immobilizer System)
B2791
Key Unlock Warning Switch Malfunction (Immobilizer System)
B2795
Unmatch Key Code (Immobilizer System)
B2796
No Communication In Immobilizer System
B2797
Communication Malfunction No. 1 (Immobilizer System)
B2798
Communication Malfunction No. 2 (Immobilizer System)