Lexus Code Retrieval

Accessing Diagnostic Trouble Codes 96 & later are OBD2 systems

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.

Image used with permission Copyright © 2001 ALLDATA LLC.

Reading Trouble Codes

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.

Clearing Trouble Codes

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)
Model Year Engine identification System
ES300 3.0L 1994-03 1MZ-FE Toyota SFI
ES330 3.3L 2004-06 3MZ-FE Toyota SFI
ES350 3.5L 2007 2GR-FE Toyota SFI
ES350 3.5L 2008-09 2GR-FE Toyota SFI
GS300 3.0L 1996-06 2JZ-GE/3GR-FSE Toyota SFI
GS350 3.5L 2007-08 2GR-FSE Toyota SFI
GS400 4.0L 1998-00 1UZ-FE Toyota SFI
GS430 4.3L 2001-08 3UZ-FE Toyota SFI
GS450h 3.5L 2006-08 2GR-FSE Toyota SFI
GS460 4.6L 2008 1UR-FSE Toyota SFI
GX470 4.7L 2003-09 2UZ-FE Toyota SFI
IS250 2.5L 2006-09 4GR-FSE Toyota SFI
IS300 3.0L 2001-05 2JZ-GE Toyota SFI
IS350 3.5L 2006-09 2GR-FSE Toyota SFI
IS F 3.5L 2008-09 2UR-GSE Toyota SFI
LS400 4.0L 1995-00 1UZ-FE Toyota SFI
LS430 4.3L 2001-06 3UZ-FE Toyota SFI
LS460 4.6L 2007-09 1UR-FSE Toyota SFI
LS600h 5.0L 2008-09 2UR-FSE Toyota SFI
LX470 4.7L 1998-07 2UZ-FE Toyota SFI
LX570 5.7L 2008-09 3UR-FE Toyota SFI
RX300 3.0L 1999-03 1MZ-FE Toyota SFI
RX330 3.3L 2004-06 3MZ-FE Toyota SFI
RX350 3.5L 2007-09 2GR-FE Toyota SFI
RX400h 3.3L 2006-08 3MZ-FE Toyota SFI
SC300 3.0L 1996-00 2JZ-GE Toyota SFI
SC400 4.0L 1996-00 1UZ-FE Toyota SFI
SC430 4.3L 2002-08 3UZ-FE Toyota SFI

4 Replies to “Lexus”

  1. i have a problem i hope you can help , i just service the timing belt after 300,ooo kms i cant get the servie light to go out i have just picked a can obd2 scan tool but i dont know to use it properly . i hope you can help thank you very much regards greg lundberg shepparton vic

  2. have a 2000 lexus ls400 have the error code p0440 have checked the fuel cap doesn’t seem to be the problem didn’t have before replacing the oil control valve had to dissconnect air cleaner to do so. what could be the cause for said code

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