Lexus GS, SC 1998-06

4.3L V8 - Auto 2

Print

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
 

Trouble Code: P1335



Crankshaft Position Sensor Circuit Malfunction

Possible Causes:



CKP sensor (+) circuit is open or shorted to ground
 
CKP sensor (-) circuit is open or shorted to ground
 
CKP sensor (+), (-) circuit is shorted to VREF or system power
 
CKP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P1500



Starter Signal Circuit Malfunction

Possible Causes:



Engine starter signal circuit is open or shorted to ground
 
Engine starter signal circuit is shorted to system power (B+)
 
Starter has failed
 
PCM has failed
 

Trouble Code: P1520



Stop Light Switch Circuit Malfunction

Possible Causes:



Stop light switch is shorted to ground
 
Stop light switch is damaged or has failed
 
PCM has failed
 

Trouble Code: P1600



PCM Battery Backup Circuit Malfunction

Possible Causes:



Battery backup circuit is open (check EFI fuse and fuse link)
 
Battery terminals are corroded or loose
 
PCM has failed
 

Trouble Code: P1780



Park/Neutral Position Switch Circuit Malfunction

Possible Causes:



P/N switch is shorted to ground or wiring harness is shorted
 
P/N switch is out-of-adjustment, damaged or has failed
 
PCM has failed
 

Trouble Code: P0031



Heated Oxygen Sensor (Bank 1 Sensor 1) Heater Circuit Low Code

Possible Causes:



HO2S-11 heater control circuit is open
 
HO2S-11 heater assembly is damaged or has failed
 
PCM has failed
 

Trouble Code: P0037



Heated Oxygen Sensor (Bank 1 Sensor 2) Heater Circuit Low Input

Possible Causes:



HO2S-12 heater control circuit is open
 
HO2S-12 heater assembly is damaged or has failed
 
PCM has failed
 

Trouble Code: P0038



Heated Oxygen Sensor (Bank 1 Sensor 2) Heater Circuit High Input

Possible Causes:



HO2S-12 heater control circuit is shorted to ground
 
HO2S-12 heater assembly is damaged or has failed
 
PCM has failed
 

Trouble Code: P0051



Heated Oxygen Sensor (Bank 2 Sensor 1) Heater Circuit Low Input

Possible Causes:



HO2S-21 heater control circuit is open
 
HO2S-21 heater assembly is damaged or has failed
 
PCM has failed
 

Trouble Code: P0052



Heated Oxygen Sensor (Bank 2 Sensor 1) Heater Circuit High Input

Possible Causes:



HO2S-21 heater control circuit is shorted to ground
 
HO2S-21 heater assembly is damaged or has failed
 
PCM has failed
 

Trouble Code: P0057



Heated Oxygen Sensor (Bank 2 Sensor 2) Heater Circuit Low Input

Possible Causes:



HO2S-22 heater control circuit is open
 
HO2S-22 heater assembly is damaged or has failed
 
PCM has failed
 

Trouble Code: P0058



Heated Oxygen Sensor (Bank 2 Sensor 2) Heater Circuit High Input

Possible Causes:



HO2S-22 heater control circuit is shorted to ground
 
HO2S-22 heater assembly is damaged or has failed
 
PCM has failed
 

Trouble Code: P0102



Mass Airflow Sensor Circuit Low Input

Possible Causes:



MAF sensor signal circuit is open or shorted to ground
 
MAF sensor is contaminated, damaged or it has failed
 
PCM has failed
 

Trouble Code: P0103



Mass Airflow Sensor Circuit High Input

Possible Causes:



MAF sensor signal circuit is shorted to power
 
MAF sensor is contaminated, damaged or it has failed
 
PCM has failed
 

Trouble Code: P0110



Intake Air Temperature Sensor Circuit Malfunction

Possible Causes:



IAT sensor signal circuit is open, shorted to ground or VREF
 
IAT sensor ground circuit is open between sensor and ground
 
IAT sensor is contaminated, damaged or has failed
 
PCM has failed
 

Trouble Code: P0112



Intake Air Temperature Sensor Circuit Low Input

Possible Causes:



IAT sensor connector is damaged (it may be shorted internally)
 
IAT sensor ground circuit is shorted to ground
 
IAT sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0113



Intake Air Temperature Sensor Circuit High Input

Possible Causes:



IAT sensor connector is damaged (it may be open internally)
 
IAT sensor ground circuit is open
 
IAT sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0117



Engine Coolant Temperature Sensor Circuit Low Input

Possible Causes:



ECT sensor signal circuit is shorted to ground
 
ECT sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0120



Throttle Pedal Position Sensor/Switch 'A' Circuit Malfunction Conditions

Possible Causes:



TP sensor signal circuit open is or shorted to ground
 
TP sensor ground circuit is open
 
TP sensor power circuit is open (test VREF circuit at the PCM)
 
TP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0121



Throttle Pedal Position Sensor Switch 'A' Signal Range/Performance

Possible Causes:



TP sensor connector is damaged or it is open
 
TP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0122



Throttle Pedal Position Sensor/Switch 'A' Circuit Low Input

Possible Causes:



Throttle control motor and sensor unit is damaged or failed
 
TP sensor VC (VREF) circuit is open, or the VTA1 signal circuit is shorted to ground
 
PCM has failed
 

Trouble Code: P0123



Throttle Pedal Position Sensor/Switch 'A' Circuit High Input

Possible Causes:



Throttle control motor and sensor unit is damaged or failed
 
TP sensor VC (VREF) circuit is shorted to the VTA1 circuit
 
VTA1 ground circuit is open or the VTA1 signal circuit is open
 
PCM has failed
 

Trouble Code: P0130



HO2S-11 (Bank 1 Sensor 1) Circuit Malfunction

Possible Causes:



HO2S signal circuit is open between the sensor and the PCM
 
HO2S signal circuit is shorted to sensor ground or to VREF
 
HO2S is damaged, contaminated or it has failed
 

Trouble Code: P0134



HO2S-11 (Bank 1 Sensor 1) Circuit No Activity Detected

Possible Causes:



Air leaks present in the PCV valve, hoses or hose connections
 
Fuel Control component faults (sticking injector, low pressure)
 
Gas leaks in the exhaust system in front of the Oxygen sensor
 
HO2S connector is damaged or loose
 
HO2S signal circuit is open or shorted to ground
 
HO2S is damaged, contaminated or it has failed
 
PCM has failed
 

Trouble Code: P0136



HO2S-12 (Bank 1 Sensor 2) Circuit Malfunction

Possible Causes:



HO2S signal circuit is open or shorted to ground
 
HO2S signal circuit shorted to VREF or system power (B+)
 
HO2S is damaged, contaminated or it has failed
 

Trouble Code: P0150



HO2S-21 (Bank 2 Sensor 1) Circuit Malfunction

Possible Causes:



HO2S signal circuit is open between the sensor and the PCM
 
HO2S signal circuit is shorted to sensor ground or to VREF
 
HO2S is damaged, contaminated or it has failed
 

Trouble Code: P0153



HO2S-21 (B2 S1) Slow Response

Possible Causes:



HO2S signal circuit is open or shorted to ground
 
HO2S element is contaminated, or HO2S heater 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: P0154



HO2S-21 (Bank 2 Sensor 1) Circuit No Activity Detected

Possible Causes:



Air leaks present in the PCV valve, hoses or hose connections
 
Fuel Control component faults (sticking injector, low pressure)
 
Gas leaks in the exhaust system in front of the Oxygen sensor
 
HO2S-21 signal circuit is open or shorted to ground
 
HO2S-21 is damaged, contaminated or it has failed
 
PCM has failed
 

Trouble Code: P0155



HO2S-21 (B2 S1) Heater Circuit Malfunction

Possible Causes:



HO2S heater control circuit is open or shorted to ground
 
HO2S heater control circuit is shorted to power
 
HO2S heater power circuit is open (check power from the relay)
 
HO2S heater is damaged or has failed
 
PCM has failed
 

Trouble Code: P0156



HO2S-22 (Bank 2 Sensor 2) Circuit Malfunction

Possible Causes:



HO2S signal circuit is open between the sensor and the PCM
 
HO2S signal circuit is shorted to sensor or chassis ground
 
HO2S is damaged, contaminated or it has failed
 

 
label.common.footer.alt.autozoneLogo