Lexus Car ES, IS, LS 1998-06

3.0L V6 VIN F Auto 1

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3.0L V6 VIN F Auto

Trouble Code: P2A00



Air Fuel Sensor (Bank 1 Sensor 1) Signal Slow Response

Possible Causes:



A/F sensor connector is damaged or loose
 
A/F sensor circuit is open or shorted, or the sensor has failed
 
A/F sensor heater is damaged or has failed
 
A/F sensor heater relay circuit is open or the relay has failed
 
Fuel delivery component has failed (fuel pressure regulator, one or more fuel injectors is leaking or severely restricted)
 
Induction system problems (air leaks or restricted air filter)
 
PCM has failed
 

Trouble Code: P2A03



Air Fuel Sensor (Bank 2 Sensor 1) Signal Slow Response

Possible Causes:



A/F sensor connector is damaged or loose
 
A/F sensor circuit is open or shorted, or the sensor has failed
 
A/F sensor heater is damaged or has failed
 
A/F sensor heater relay circuit is open or the relay has failed
 
Fuel delivery component has failed (fuel pressure regulator, one or more fuel injectors is leaking or severely restricted)
 
Induction system problems (air leaks or restricted air filter)
 
PCM has failed
 

Trouble Code: P0010



VVT Oil Control Circuit Malfunction (Bank 1)

Possible Causes:



OCV assembly connector is damaged or loose
 
OCV assembly control circuit is open or shorted to ground
 
OCV assembly is damaged or has failed
 
PCM has failed
 

Trouble Code: P0011



Camshaft Position 'A' Over-Advanced Or System Performance (Bank 1)

Possible Causes:



Engine valve timing malfunction
 
Camshaft timing oil control valve unit is damaged or has failed
 
PCM or VVT ECM has failed
 

Trouble Code: P0012



Camshaft Position 'A' Over-Retarded (Bank 1)

Possible Causes:



Engine valve timing malfunction
 
Camshaft timing oil control valve unit is damaged or has failed
 
PCM or VVT ECM has failed
 

Trouble Code: P0016



Camshaft Position-Crankshaft Position (Bank 1 Sensor A)

Possible Causes:



Engine valve timing problem
 
Engine timing belt mechanical problem (skipped teeth or belt)
 
PCM has failed
 

Trouble Code: P0018



Camshaft Position-Crankshaft Position (Bank 2 Sensor A)

Possible Causes:



Engine valve timing problem
 
Engine timing belt mechanical problem (skipped teeth or belt)
 
PCM has failed
 

Trouble Code: P0020



Camshaft Position Sensor Actuator 'A' Circuit (Bank 2)

Possible Causes:



OCV assembly connector is damaged or loose
 
OCV assembly control circuit is open or shorted to ground
 
OCV assembly is damaged or has failed
 
PCM has failed
 

Trouble Code: P0021



Camshaft Position 'A' Timing Over-Advanced Or System Performance (Bank 2)

Possible Causes:



Engine valve timing malfunction
 
Camshaft timing oil control valve unit is damaged or has failed
 
PCM or VVT ECM has failed
 

Trouble Code: P0022



Camshaft Position 'A' Timing Over-Retarded (Bank 2)

Possible Causes:



Engine valve timing malfunction
 
Camshaft timing oil control valve unit is damaged or has failed
 
PCM or VVT ECM has failed
 

Trouble Code: P0036



Heated Oxygen Sensor (Bank 1 Sensor 2) Heater Circuit Malfunction

Possible Causes:



HO2S-12 heater control circuit is open or shorted to ground
 
HO2S-12 heater assembly is damaged or has failed
 
HO2S-12 heater power circuit open (test power from EFI relay)
 
PCM has failed
 

Trouble Code: P0100



Mass Airflow Sensor Circuit Malfunction

Possible Causes:



MAF sensor signal circuit is open, shorted to ground or power
 
MAF sensor ground circuit is open between sensor and ground
 
MAF sensor power circuit is open (check the power to the relay)
 
MAF sensor has failed, or the PCM has failed
 

Trouble Code: P0101



Mass Airflow Sensor Signal Range/Performance

Possible Causes:



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

Trouble Code: P0115



Engine Coolant Temperature Sensor Circuit Malfunction

Possible Causes:



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

Trouble Code: P0116



Engine Coolant Temperature Sensor Range/Performance

Possible Causes:



Check for a low coolant level or an incorrect coolant mixture
 
ECT sensor signal circuit or ground circuit has high resistance
 
ECT sensor is contaminated, damaged or out-of-calibration
 
PCM has failed
 

Trouble Code: P0120



TP Sensor or Switch 'A' Circuit Malfunction

Possible Causes:



TP sensor signal circuit is open or shorted to ground
 
TP sensor ground circuit is open, or the power circuit is open
 
TP sensor is damaged or has failed
 

Trouble Code: P0121



TP Sensor or TP Switch 'A' Signal Range/Performance

Possible Causes:



TP sensor signal circuit open or shorted to ground (intermittent)
 
TP sensor is loose at it mounting or the throttle is binding
 
TP sensor is damaged or has failed (perform a sweep test)
 
PCM has failed
 

Trouble Code: P0125



Insufficient Coolant Temperature For Closed Loop:

Possible Causes:



Check the operation of the thermostat (it may be stuck open)
 
ECT sensor signal circuit has high resistance
 
ECT sensor has failed
 
Inspect for low coolant level or an incorrect coolant mixture
 

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

Trouble Code: P0133



HO2S-11 (Bank 1 Sensor 1) 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: P0134



Air Fuel Sensor 1 (Bank 1 Sensor 1) Circuit No Activity Detected

Possible Causes:



Air leaks present in the PCV valve, hoses or hose connections
 
A/FS1 connector is damaged or loose
 
A/FS1 signal circuit is open or shorted to ground
 
A/FS1 is damaged, contaminated or it has failed
 
Fuel Control component faults (sticking injector, low pressure)
 
Gas leaks in the exhaust system in front of the Oxygen sensor
 
PCM has failed
 

Trouble Code: P0135



HO2S-11 (Bank 1 Sensor 1) 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: P0136



HO2S-12 (Bank 1 Sensor 2) Circuit Malfunction Code

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: P0141



HO2S-12 (Bank 1 Sensor 2) Heater Circuit Malfunction

Possible Causes:



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

Trouble Code: P0154



Air Fuel Sensor 2 (Bank 2 Sensor 1) Circuit No Activity Detected

Possible Causes:



Air leaks present in the PCV valve, hoses or hose connections
 
A/FS1 connector is damaged or loose
 
A/FS1 signal circuit is open or shorted to ground
 
A/FS1 is damaged, contaminated or it has failed
 
Fuel Control component faults (sticking injector, low pressure)
 
Gas leaks in the exhaust system in front of the Oxygen sensor
 

Trouble Code: P0155



Air Fuel Sensor 2 (Bank 2 Sensor 1) Heater Circuit Malfunction

Possible Causes:



A/FS1 heater control circuit is open, shorted to ground or power
 
A/FS1 heater power circuit is open (check power from relay)
 
A/FS1 heater is damaged or has failed
 
PCM has failed
 

Trouble Code: P0171



Fuel System Too Lean (Bank 1)

Possible Causes:



A/FS or HO2S is contaminated, deteriorated or it has failed
 
Air leaks after the MAF sensor, or in the EGR or PCV system
 
Base engine "mechanical" fault affecting one or more cylinders
 
Exhaust leaks located in front of the A/FS or HO2S location
 
Fuel system supplying too little fuel during cruise or idle (faulty fuel pump or fuel filter)
 
Fuel injector (one or more) dirty or pressure regulator has failed
 
Vehicle driven low on fuel or until it ran out of fuel
 

Trouble Code: P0172



Fuel System Too Rich (Bank 1)

Possible Causes:



A/FS or HO2S is contaminated, deteriorated or it has failed
 
Base engine "mechanical" fault affecting one or more cylinders
 
EVAP system component has failed or canister fuel saturated
 
Exhaust leaks located in front of the A/FS or HO2S location
 
Fuel control sensor is out of calibration (i.e., ECT, IAT or MAF)
 
Fuel delivery system supplying too much fuel during cruise or idle periods (e.g., faulty fuel pump, or faulty pressure regulator)
 
Fuel injector(s) is leaking or stuck partially open (one or more)
 

Trouble Code: P0174



Fuel System Too Lean (Bank 2)

Possible Causes:



A/FS or HO2S is contaminated, deteriorated or it has failed
 
Air leaks after the MAF sensor, or in the EGR or PCV system
 
Base engine "mechanical" fault affecting one or more cylinders
 
Exhaust leaks located in front of the A/FS or HO2S location
 
Fuel control sensor is out of calibration (i.e., ECT, IAT or MAF)
 
Fuel delivery system supplying too little fuel during cruise or idle periods (e.g., faulty fuel pump or dirty, restricted fuel filter)
 
Fuel injector (one or more) dirty or pressure regulator has failed
 
MAF sensor is contaminated, out-of-calibration or damaged
 
Vehicle driven low on fuel or until it ran out of fuel
 

Trouble Code: P0175



Fuel System Too Rich (Bank 2)

Possible Causes:



A/FS or HO2S is contaminated, deteriorated or it has failed
 
Base engine "mechanical" fault affecting one or more cylinders
 
EVAP system component has failed or canister fuel saturated
 
Exhaust leaks located in front of the A/FS or HO2S location
 
Fuel control sensor is out of calibration (i.e., ECT, IAT or MAF)
 
Fuel delivery system supplying too much fuel during cruise or idle periods (e.g., faulty fuel pump, or faulty pressure regulator)
 
Fuel injector(s) is leaking or stuck partially open (one or more)
 

Trouble Code: P0300



Multiple Cylinder Misfire Detected

Possible Causes:



Air leak in the intake manifold, or in the EGR or PCV system
 
Base engine mechanical fault that affects two or more cylinders
 
EGR valve is stuck open or the PCV system has a vacuum leak
 
Fuel delivery component fault that affects two or more cylinders (e.g., contaminated, dirty or sticking fuel injectors)
 
Ignition system fault (coil or plug) that affects several cylinders
 
Mass airflow meter is contaminated, or its signal is out of range
 

Trouble Code: P0301



Cylinder 1 Misfire Detected

Possible Causes:



Base engine mechanical fault that affects only Cylinder 1
 
EGR valve is stuck open or the PCV system has a vacuum leak
 
Fuel component fault that affects only Cylinder 1 (a contaminated or sticking injector)
 
Ignition system problem (coil or plug) that affects Cylinder 1
 

Trouble Code: P0302



Cylinder 2 Misfire Detected

Possible Causes:



Base engine mechanical fault that affects only Cylinder 2
 
EGR valve is stuck open or the PCV system has a vacuum leak
 
Fuel component fault that affects only Cylinder 2 (a contaminated or sticking injector)
 
Ignition system problem (coil or plug) that affects Cylinder 2
 

Trouble Code: P0303



Cylinder 3 Misfire Detected

Possible Causes:



Base engine mechanical fault that affects only Cylinder 3
 
EGR valve is stuck open or the PCV system has a vacuum leak
 
Fuel component fault that affects only Cylinder 3 (a contaminated or sticking injector)
 
Ignition system problem (coil or plug) that affects Cylinder 3
 

Trouble Code: P0304



Cylinder 4 Misfire Detected

Possible Causes:



Base engine mechanical fault that affects only Cylinder 4
 
EGR valve is stuck open or the PCV system has a vacuum leak
 
Fuel component fault that affects only Cylinder 4 (a contaminated or sticking injector)
 
Ignition system problem (coil or plug) that affects Cylinder 4
 

Trouble Code: P0305



Cylinder 5 Misfire Detected

Possible Causes:



Base engine mechanical fault that affects only Cylinder 5
 
EGR valve is stuck open or the PCV system has a vacuum leak
 
Fuel delivery component fault that affects only Cylinder 5 (e.g., a contaminated, dirty or sticking fuel injector)
 
Ignition system problem (coil or plug) that affects Cylinder 5
 

Trouble Code: P0306



Cylinder 6 Misfire Detected

Possible Causes:



Base engine mechanical fault that affects only Cylinder 6
 
EGR valve is stuck open or the PCV system has a vacuum leak
 
Fuel delivery component fault that affects only Cylinder 6 (e.g., a contaminated, dirty or sticking fuel injector)
 
Ignition system problem (coil or plug) that affects Cylinder 6
 
Mass airflow meter is contaminated, or its signal is out of range
 

Trouble Code: P0325



Knock Sensor 1 Circuit Malfunction

Possible Causes:



Verify that the Knock Sensor (KS) is tightened to specification
 
Knock sensor signal circuit is open or shorted to ground
 
Knock sensor signal circuit is shorted to VREF or system power
 
Knock sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0330



Knock Sensor 2 Circuit Malfunction

Possible Causes:



Verify that the Knock Sensor (KS) is tightened to specification
 
Knock sensor signal circuit is open, shorted to ground or VREF
 
Knock sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0335



Crankshaft Position Sensor 'A' Circuit Malfunction

Possible Causes:



CKP Sensor 'A' signal circuit is open, shorted to ground or shorted to system power
 
CKP Sensor 'A' signal ground circuit is open
 
CKP Sensor 'A' is damaged or has failed
 

 
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