Toyota Highlander 6 2001-06

2.4L L4 - Auto 2

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Trouble Code: P0340



Camshaft Position Sensor Circuit Malfunction

Possible Causes:



CMP sensor signal circuit is open or shorted to ground
 
CMP sensor signal ground circuit is open
 
CMP sensor signal is shorted to VREF or system power
 
CMP sensor is damaged or has failed
 
PCM has failed
 
TSB EG010-02 (4/02) contains information related to this code
 

Trouble Code: P0401



EGR System Insufficient Flow Detected

Possible Causes:



EGR gas temperature sensor circuit open or shorted to VREF
 
EGR gas temperature sensor is damaged or has failed
 
EGR valve is stuck in closed position
 
EGR valve vacuum hose is disconnected or leaking
 

Trouble Code: P0402



Excessive EGR Flow Detected

Possible Causes:



EGR gas temperature sensor circuit open or shorted to ground
 
EGR gas temperature sensor is damaged or has failed
 
EGR Vacuum Switching Valve (VSV) is damaged or has failed
 
EGR valve stuck partiAlly or EGR valve stuck fully open
 
EGR VSV control circuit is open or shorted to system power
 
PCM has failed
 

Trouble Code: P0420



Catalyst Efficiency Below Normal (Bank 1)

Possible Causes:



Air leaks at the exhaust manifold or in the exhaust pipes
 
Catalytic converter is damaged, contaminated or has failed
 
Front HO2S or rear HO2S is contaminated with fuel or moisture
 
Front HO2S or the rear HO2S is loose in its mounting hole
 
Front HO2S is older (aged) than the rear HO2S (HO2S is lazy)
 

Trouble Code: P0440



EVAP Control System Large Leak (0.080") Detected

Possible Causes:



Charcoal canister is clogged, loaded with fuel or with moisture
 
Fuel filler cap missing, loose (not tightened) or the wrong part
 
Fuel tank over-fill check valve cracked or damaged
 
Fuel tank seal leaking, fuel tank cracked or damaged/leaking
 
Fuel vapor hoses/tubes blocked or restricted, or fuel vapor control valve tube or fuel vapor vent valve assembly blocked
 
Vacuum hose or tubing cracked, damaged or disconnected
 
Vapor Pressure sensor incorrectly instAlled
 
PCM has failed
 

Trouble Code: P0442



EVAP System SmAll Leak (0.040") Detected

Possible Causes:



Canister Purge valve is damaged, leaking or has failed
 
Charcoal canister is loaded with fuel or moisture
 
Fuel filler cap loose, cross-threaded, incorrect part or damaged
 
Fuel tank is cracked (leaking), or a leak exists in the 'O' ring
 
Fuel tank pressure sensor is damaged or has failed
 
Fuel vapor line(s), fuel pipes or hoses damaged or leaking
 
PCM has failed
 

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: 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: 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: P0724



Brake Switch 'B' Circuit High Input

Possible Causes:



Stoplight switch signal circuit is shorted to power
 
Stoplight switch assembly is damaged or shorted
 
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: 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 No. 1 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: 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: P1349



Variable Valve Timing System (Bank 1)

Possible Causes:



Oil control valve is damaged or has failed
 
Valve timing is not correct
 
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: 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: 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: P2195



Air Fuel Sensor 1 (Bank 1 Sensor 1) Signal Stuck "Lean"

Possible Causes:



A/FS1 signal circuit is open or shorted to ground
 
A/FS1 is damaged, contaminated or it has failed
 
Air induction system is severely restricted
 
Fuel Control component problems (e.g., low fuel pressure, or one or more severely restricted fuel injectors)
 
PCM has failed
 

Trouble Code: P2196



Air Fuel Sensor 1 (Bank 1 Sensor 1) Signal Stuck "Rich"

Possible Causes:



A/FS1 signal circuit is open or shorted to ground
 
A/FS1 is damaged, contaminated or it has failed
 
Air induction system is leaking (check for PCV system leaks)
 
Fuel component problem (high fuel pressure, leaking regulator or a leaking injector)
 
PCM has failed
 

Trouble Code: P2198



Air Fuel Sensor 1 (Bank 2 Sensor 1) Signal Stuck "Rich"

Possible Causes:



A/FS1 signal circuit is open or shorted to ground
 
A/FS1 is damaged, contaminated or it has failed
 
Air induction system is leaking (check for PCV system leaks)
 
Fuel Control component problems (e.g., high fuel pressure, a leaking pressure regulator, one or more leaking fuel injectors)
 
PCM has failed
 

Trouble Code: P2237



Air Fuel Sensor 1 (Bank 1 Sensor 1) Pumping Current Signal Open

Possible Causes:



A/FS1 signal circuit is open or shorted to ground
 
A/FS1 is damaged, contaminated or it has failed
 
A/FS1 heater assembly is damaged or its circuit has failed
 
A/FS1 heater relay is damaged or has failed
 
PCM has failed
 

 
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