1999 Lexus LS 400FACTORY OEM SERVICE PROCEDURE

Diagnostic Trouble Code Identification

DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION

DTC (1) Description
B2795(2) Unmatched Key Code
B2796(2) No Communication In Immobilizer System
B2797(2) Communication Malfunction No. 1
B2798(2) Communication Malfunction No. 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 Position (TP) Sensor Circuit Malfunction
P0121  Throttle Position (TP) Sensor Circuit Range/Performance Fault
P0125  Insufficient Coolant Temperature For Closed Loop Fuel Control
P0130  Heated Oxygen Sensor Circuit Malfunction
P0133  Heated Oxygen Sensor Circuit Slow Response
P0135  Heated Oxygen Sensor Heater Circuit
P0136  Heated Oxygen Sensor Circuit
P0141  Heated Oxygen Sensor Heater Circuit
P0150  Heated Oxygen Sensor Circuit Malfunction
P0153  Heated Oxygen Sensor Circuit Slow Response
P0155  Heated Oxygen Sensor Heater Circuit
P0156  Heated Oxygen Sensor Circuit Malfunction
P0161  Heated Oxygen Sensor Heater Circuit
P0171  System Too Lean
P0172  System Too Rich
P0300  Random Cylinder Misfire Detected
P0301  Cylinder No. 1 Misfire Detected
P0302  Cylinder No. 2 Misfire Detected
P0303  Cylinder No. 3 Misfire Detected
P0304  Cylinder No. 4 Misfire Detected
P0305  Cylinder No. 5 Misfire Detected
P0306  Cylinder No. 6 Misfire Detected
P0307  Cylinder No. 7 Misfire Detected
P0308  Cylinder No. 8 Misfire Detected
P0325  Knock Sensor No. 1
P0330  Knock Sensor No. 2
P0335  Crankshaft Position (CKP) Sensor Circuit
P0340  Camshaft Position (CMP) Sensor Circuit
P0420  Catalyst System Efficiency Below Threshold
P0430  Catalyst System Efficiency Below Threshold
P0440  EVAP System Malfunction
P0441  Incorrect EVAP Purge Flow
P0446  EVAP Vent Control Fault
P0450  EVAP Pressure Sensor Malfunction
P0451  EVAP Pressure Sensor Range/Performance Fault
P0500  Vehicle Speed Sensor (VSS) Malfunction
P0505  Idle Control System Malfunction
P0710(3) Transmission Fluid Temperature Sensor Fault
P0715(3) Turbine Speed Sensor Fault
P0750(3) Shift Solenoid Valve No. 1 Fault
P0753(3) Shift Solenoid Valve No. 1 Electrical Fault
P0755(3) Shift Solenoid Valve No. 2 Fault
P0758(3) Shift Solenoid Valve No. 2 Electrical Fault
P0760(3) Shift Solenoid Valve No. 3 Fault
P0763(3) Shift Solenoid Valve No. 3 Electrical Fault
P0768(3) Shift Solenoid Valve No. 4 Electrical Fault
P0770(3) Lock-Up Solenoid Fault
P1120  Accelerator Position Sensor Circuit Malfunction
P1121  Accelerator Position Sensor Circuit Malfunction
P1125  Throttle Control Motor Circuit Malfunction
P1126  Electromagnetic Clutch Circuit Malfunction
P1127  Electronic Throttle Control System (ETCS) Actuator Power Source Circuit Malfunction
P1128  Throttle Control Motor Lock Malfunction
P1129  Electronic Throttle Control System (ETCS) Malfunction
P1200  Fuel Pump Relay Circuit
P1300  Ignitor Circuit Malfunction (No. 1)
P1305  Ignitor Circuit Malfunction (No. 2)
P1310  Ignitor Circuit Malfunction (No. 3)
P1315  Ignitor Circuit Malfunction (No. 4)
P1320  Ignitor Circuit Malfunction (No. 5)
P1325  Ignitor Circuit Malfunction (No. 6)
P1330  Ignitor Circuit Malfunction (No. 7)
P1335  Crankshaft Position (CKP) Sensor Circuit
P1340  Ignitor Circuit Malfunction (No. 8)
P1345  Variable Valve Timing (VVT) Sensor Circuit Malfunction
P1346  Variable Valve Timing (VVT) Circuit Range/Performance Fault
P1349  Variable Valve Timing (VVT) System Malfunction
P1350  Variable Valve Timing (VVT) Sensor Circuit Malfunction
P1351  Variable Valve Timing (VVT) Circuit Range/Performance Fault
P1354  Variable Valve Timing (VVT) System Malfunction
P1520  Stoplight Switch Signal Malfunction
P1566 (4) Cruise Control Main Switch Circuit Fault
P1600  ECM Batt Malfunction
P1633  Electronic Throttle Control System (ETCS) Circuit ECM Malfunction
P1645  Body ECU Malfunction
P1656  Oil Control Valve (OCV) Malfunction
P1663  Oil Control Valve (OCV) Malfunction
P1755(3) Shift Solenoid Valve SLU Fault
P1760(3) Shift Solenoid Valve SLT Fault
P1765(3) Shift Solenoid Valve SLN Fault
P1780  Park/Neutral Position Switch Malfunction
(1) Some codes are two-trip detection logic code(s). For more information, see DETECTION LOGIC under INTRODUCTION in SELF-DIAGNOSTIC - INTRODUCTION article.
(2) MIL will not illuminate. For testing procedures, see ENGINE IMMOBILIZER SYSTEMS - LS400 article in ACCESSORIES & EQUIPMENT.
(3) These codes only apply to electronically controlled transmissions. For testing procedures, see DIAGNOSIS - A-650E article in AUTOMATIC TRANSMISSIONS.
(4) This DTC applies to cruise control system. See appropriate CRUISE CONTROL SYSTEMS article in ACCESSORIES & EQUIPMENT.
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