Lexus GS, SC 1998-06

4.0L V8 VIN H Auto 3

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Trouble Code: P0500



Vehicle Speed Sensor Circuit Malfunction

Possible Causes:



VSS signal circuit is open, shorted to ground or to power (B+)
 
Combination Meter is damaged or has failed
 
PCM has failed
 
TSB EG004-02 (2/02) contains information related to this code
 

Trouble Code: P0503



Vehicle Speed Sensor 'A' Signal Erratic Or Intermittent

Possible Causes:



ABS ECU is damaged or has failed
 
Combination Meter is damaged or has failed
 
VSS signal circuit is open between the meter and the PCM
 
VSS signal circuit shorted to ground between meter and PCM
 

Trouble Code: P0504



Brake Switch 'A' To 'B' Correlation Malfunction

Possible Causes:



Stoplight switch signal circuit is shorted to power
 
Stoplight switch assembly is damaged or shorted
 
PCM has failed
 

Trouble Code: P0505



Idle Control System Malfunction

Possible Causes:



RSC/RSO connector is damaged, open or shorted
 
RSC or RSO control circuit is open, shorted to ground or power
 
RSO or RSO power circuit is open (test power from EFI relay)
 
IAC valve is contaminated
 

Trouble Code: P0571



Brake Switch 'A' Circuit Malfunction

Possible Causes:



Stoplight switch signal circuit is shorted to power
 
Stoplight switch assembly is damaged or shorted
 
PCM has failed
 

Trouble Code: P0604



PCM Internal Control Module Random Access Memory Processing Error

Possible Causes:



Clear the codes and retest for this code. If the same code resets, substitute a known good control module and retest. If the trouble code is gone, the original PCM has failed.
 
TSB TC002-03 (6/03) contains information related to this code
 

Trouble Code: P0606



ECM/PCM Processing Error

Possible Causes:



Clear the codes and retest for this code. If the same code resets, substitute a known good control module and retest. If the trouble code is gone, the original PCM has failed.
 
TSB TC002-03 (6/03) contains information related to this code
 

Trouble Code: P0607



Control Module Performance

Possible Causes:



Clear the codes and retest for this code. If the same code resets, substitute a known good control module and retest. If the trouble code is gone, the original PCM has failed.* TSB TC002-03 (6/03) contains information related to this code
 

Trouble Code: P0617



Starter Relay Circuit High Input

Possible Causes:



Park/Neutral switch assembly is damaged or it has failed* Ignition switch is damaged or has failed
 
PCM has failed
 

Trouble Code: P0657



PCM Actuator Supply Voltage Circuit Malfunction

Possible Causes:



Actuator supply voltage circuit is open
 
Clear the codes and retest for this code. If the same code resets, substitute a known good control module and retest. If the trouble code is gone, the original PCM has failed.
 
TSB TC002-03 (6/03) contains information related to this code
 

Trouble Code: P0705



A/T Range Sensor Circuit (PRNDL) Malfunction

Possible Causes:



Park/Neutral switch assembly is shorted
 
Park/Neutral switch assembly is damaged or has failed
 
PCM has failed.
 

Trouble Code: P0710



Transmission Fluid Temperature Sensor Circuit Malfunction

Possible Causes:



TFT sensor signal circuit is open, shorted to ground or shorted to system power
 
TFT sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0711



Transmission Fluid Temperature Sensor Performance

Possible Causes:



TFT sensor signal circuit or ground circuit has high resistance
 
TFT sensor has failed, or the PCM has failed
 

Trouble Code: P0715



A/T Input Shaft/Direct Clutch Speed Sensor Circuit Malfunction

Possible Causes:



O/D direct clutch speed sensor circuit is open
 
O/D direct clutch speed sensor circuit is shorted to ground
 
O/D direct clutch speed sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0750



A/T Shift Solenoid 1 or 'A' Malfunction (Mechanical)

Possible Causes:



A/T component problems (i.e., in clutch, brake or gears)
 
SS1 or SSA is damaged, stuck "open" or stuck "closed"
 
Transmission valve body is clogged, dirty or stuck
 

Trouble Code: P0753



A/T Shift Solenoid 1 or 'A' Circuit Malfunction

Possible Causes:



SS1 or SSA control circuit is open, shorted to ground or shorted to system power (B+)
 
SS1 or SSA has failed, or the PCM has failed
 

Trouble Code: P0755



A/T Shift Solenoid 'B' Malfunction (Mechanical)

Possible Causes:



A/T component problems (i.e., in clutch, brake or gears)
 
SSB is damaged, stuck "open" or stuck "closed"
 
Transmission valve body is clogged, dirty or stuck
 

Trouble Code: P0758



A/T Shift Solenoid 2 or 'B' Circuit Malfunction

Possible Causes:



SS2 or SSB control circuit is open or shorted to ground
 
SS2or SSB control circuit is shorted to system power (B+)
 
SS2 or SSB is damaged or has failed (an electrical fault)
 
PCM has failed
 

Trouble Code: P0770



A/T Shift Solenoid 'E' (SL) Malfunction (Mechanical)

Possible Causes:



A/T component problems (i.e., in clutch, brake or gears)
 
SL (shift lockup) is damaged, stuck "open" or stuck "closed"
 
Transmission valve body is clogged, dirty or stuck
 

Trouble Code: P0773



A/T Shift Solenoid 'E' (SL) Circuit Malfunction

Possible Causes:



SL control circuit is open or shorted to ground
 
SL control circuit is shorted to system power (B+)
 
SL is damaged or has failed (an electrical fault)
 
PCM has failed
 

Trouble Code: P0850



A/T Park/Neutral Switch Circuit Malfunction

Possible Causes:



Park/Neutral switch assembly is shorted*Park/Neutral switch assembly is damaged or has failed
 
PCM has failed.
 

Trouble Code: P1120



Accelerator Pedal Position Sensor Circuit Malfunction

Possible Causes:



APP sensor circuit is open or shorted to ground
 
APP sensor circuit is shorted to VREF
 
APP sensor power circuit is open between sensor and the PCM
 
APP sensor ground circuit is open between sensor and PCM
 
APP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P1121



ETCS Accelerator Pedal Position Sensor Performance

Possible Causes:



APP sensor is damaged or has failed
 
Throttle assembly or throttle linkage is binding or has failed
 
PCM has failed
 

Trouble Code: P1125



ETCS Throttle Control Motor Circuit Malfunction

Possible Causes:



ETCS throttle motor control (+) circuit is open, shorted to ground or to power (B+)
 
ETCS throttle motor control (-) circuit is open, shorted to ground or to power (B+)
 
ETCS throttle motor is damaged or has failed
 
PCM has failed
 

Trouble Code: P1126



Magnetic Clutch Circuit Malfunction

Possible Causes:



ETCS magnetic clutch (+) circuit is open, shorted to ground or to power (B+)
 
ETCS magnetic clutch (-) circuit is open, shorted to ground or to power (B+)
 
ETCS magnetic clutch is damaged or has failed
 
PCM has failed
 

Trouble Code: P1127



ETCS Actuator Power Source Circuit Malfunction

Possible Causes:



Battery connections are dirty or loose
 
ETCS power source circuit is open (check the ETCS fuse)
 
PCM has failed
 

Trouble Code: P1128



ETCS Throttle Control Motor Lock Malfunction

Possible Causes:



ETCS throttle motor is damaged or has failed
 
Throttle body assembly is damaged or stuck closed
 
PCM has failed
 

Trouble Code: P1129



Electric Throttle Control System (ETCS) Malfunction

Possible Causes:



ETCS (system) is damaged or has failed
 
PCM has failed
 

Trouble Code: P1130



A/F Sensor-11 (Bank 1 Sensor 1) Circuit Malfunction

Possible Causes:



A/FS signal circuit or ground circuit is open (intermittent fault)
 
A/FS is contaminated, damaged or has failed
 
PCM has failed
 

Trouble Code: P1133



A/F Sensor-11 (Bank 1 Sensor 1) Slow Response

Possible Causes:



A/F sensor signal circuit or ground circuit is open
 
A/F sensor power circuit is open
 
A/F sensor is contaminated, damaged or has failed
 
Intake air leaks, exhaust manifold leaks or PCV system leaks
 
MAF sensor out of calibration (it may be dirty or contaminated)
 
PCM has failed
 

Trouble Code: P1135



A/F Sensor-11 (Bank 1 Sensor 1) Heater Circuit Malfunction

Possible Causes:



A/F sensor heater circuit or ground circuit is open
 
A/F sensor heater power circuit is open
 
A/F sensor heater is damaged or has failed
 
PCM has failed
 

Trouble Code: P1150



A/F Sensor-21 (Bank 2 Sensor 1) Circuit Malfunction

Possible Causes:



A/FS signal circuit or ground circuit is open (intermittent fault)
 
A/FS power circuit is open (an intermittent fault)
 
A/FS is contaminated, damaged or has failed
 
PCM has failed
 

Trouble Code: P1153



A/F Sensor-21 (Bank 2 Sensor 1) Slow Response

Possible Causes:



A/F sensor signal circuit or ground circuit is open
 
A/F sensor power circuit is open
 
A/F sensor is contaminated, damaged or has failed
 
Intake air leaks, exhaust manifold leaks or PCV system leaks
 
MAF sensor out of calibration (it may be dirty or contaminated)
 

Trouble Code: P1155



A/F Sensor-21 (Bank 2 Sensor 1) Heater Circuit Malfunction

Possible Causes:



A/F sensor heater circuit or ground circuit is open
 
A/F sensor heater power circuit is open
 
A/F sensor heater is damaged or has failed
 
PCM has failed
 

Trouble Code: P1300



Igniter Circuit Malfunction

Possible Causes:



IGT or IGF signal circuit is open between the igniter and PCM
 
IGT or IGF signal circuit is shorted to ground
 
Igniter is damaged or has failed
 
PCM has failed
 

Trouble Code: P1305



Igniter No. 2 Circuit Malfunction

Possible Causes:



IGT or IGF signal circuit is open or shorted to ground
 
Igniter is damaged or has failed
 
PCM has failed
 

Trouble Code: P1310



Igniter No. 3 Circuit Malfunction

Possible Causes:



IGT or IGF signal circuit is open or shorted to ground
 
Igniter is damaged or has failed
 

Trouble Code: P1315



Igniter No. 4 Circuit Malfunction

Possible Causes:



IGT or IGF signal circuit is open or shorted to ground
 
Igniter is damaged or has failed
 
PCM has failed
 

Trouble Code: P1320



Igniter No. 5 Circuit Malfunction

Possible Causes:



IGT or IGF signal circuit is open between the igniter and PCM
 
IGT or IGF signal circuit is shorted to ground
 
Igniter is damaged or has failed
 
PCM has failed
 

Trouble Code: P1325



Igniter No. 6 Circuit Malfunction

Possible Causes:



IGT or IGF signal circuit is open between the igniter and PCM
 
IGT or IGF signal circuit is shorted to ground
 
Igniter is damaged or has failed
 
PCM has failed
 

 
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