2001 TOYOTA SEQUOIA engine
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DI±60
± DIAGNOSTICSENGINE
254 Author: Date:
2005 SEQUOIA (RM1146U)P0122
(DI±127)
Throttle/Pedal Position Sensor/
Switch ºAº Circuit Low Input
Short in throttle control motor and sensor circuit
Throttle control motor and sensor
Short in VTA1 circuit
Open in VC circuit
ECM
P0123
(DI±127)Throttle/Pedal Position Sensor/
Switch ºAº Circuit High Input
Open in throttle control motor and sensor circuit
Throttle control motor and sensor
Open in VTA1 circuit
Open in E2 circuit
VC and VTA1 circuit are short±circuited
ECM
P0125
(DI±139)Insufficient Coolant Temperature
for Closed Loop Fuel ControlCooling system
Engine coolant temperature sensor
Thermostat
P0128
(DI±142)Coolant Thermostat (Coolant
Temperature Below Thermostat
Regulating Temperature)Thermostat
Cooling system
Engine coolant temperature sensor
ECM
P0136
(DI±146)Oxygen Sensor Circuit Malfunc-
tion (Bank 1 Sensor 2)
Open or short in HO2 sensor (sensor 2) circuit
HO2 sensor (sensor 2)
HO2 sensor heater (sensor 2)
Air±Fuel Ratio (A/F) sensor (sensor 1)
EFI relay
Gas leakage from exhaust system
P0137
(DI±146)Oxygen Sensor Circuit Low Volt-
age (Bank 1 Sensor 2)
Open in HO2 sensor (sensor 2) circuit
HO2 sensor (sensor 2)
HO2 sensor heater (sensor 2)
EFI relay
Gas leakage from exhaust system
P0138
(DI±146)Oxygen Sensor Circuit High Volt-
age (Bank 1 Sensor 2)Short in HO2 sensor (sensor 2) circuit
HO2 sensor (sensor 2)
ECM internal circuit malfunction
P0156
(DI±146)Oxygen Sensor Circuit Malfunc-
tion (Bank 2 Sensor 2)
Open or short in HO2 sensor (sensor 2) circuit
HO2 sensor (sensor 2)
HO2 sensor heater (sensor 2)
Air±Fuel Ratio (A/F) sensor (sensor 1)
EFI relay
Gas leakage from exhaust system
P0157
(DI±146)Oxygen Sensor Circuit Low Volt-
age (Bank 2 Sensor 2)
Open in HO2 sensor (sensor 2) circuit
HO2 sensor (sensor 2)
HO2 sensor heater (sensor 2)
EFI relay
Gas leakage from exhaust system
P0158
(DI±146)Oxygen Sensor Circuit High Volt-
age (Bank 2 Sensor 2)Short in HO2 sensor (sensor 2) circuit
HO2 sensor (sensor 2)
ECM internal circuit malfunction
Page 255 of 4323
± DIAGNOSTICSENGINE
DI±61
255 Author: Date:
2005 SEQUOIA (RM1146U)P0171
(DI±165)
System too Lean (Bank 1)
Air induction system
Injector blockage
Mass air flow meter
Engine coolant temperature sensor
Fuel pressure
Gas leakage on exhaust system
Open or short in heated oxygen sensor (bank 1 sensor 1)
circuit
Heated oxygen sensor (bank 1 sensor 1)
Heated oxygen sensor heater
EFI relay
PCV piping
ECM
P0172
(DI±165)System too Rich (Bank 1)
Injector leak, blockage
Mass air flow meter
Engine coolant temperature sensor
Ignition system
Fuel pressure
Gas leakage in exhaust system
Open or short in heated oxygen sensor (bank 1 sensor 1)
circuit
Heated oxygen sensor (bank 1 sensor 1)
ECM
P0174
(DI±165)System too Lean (Bank 2)
Air induction system
Injector blockage
Mass air flow meter
Engine coolant temperature sensor
Fuel pressure
Gas leakage on exhaust system
Open or short in heated oxygen sensor (bank 2 sensor 1)
circuit
Heated oxygen sensor (bank 2 sensor 1)
Heated oxygen sensor heater
EFI relay
PCV piping
ECM
P0175
(DI±165)System too Rich (Bank 2)
Injector leak, blockage
Mass air flow meter
Engine coolant temperature sensor
Ignition system
Fuel pressure
Gas leakage in exhaust system
Open or short in heated oxygen sensor (bank 2 sensor 1)
circuit
Heated oxygen sensor (bank 2 sensor 1)
ECM
P0220
(DI±127)Throttle/Pedal Position Sensor/
Switch ºBº CircuitThrottle control motor and sensor
ECM
P0222
(DI±127)Throttle/Pedal Position Sensor/
Switch ºBº Circuit Low Input
Throttle control motor and sensor
Short in VTA2 circuit
Open in VC circuit
ECM
P0223
(DI±127)Throttle/Pedal Position Sensor/
Switch ºBº Circuit High Input
Throttle control motor and sensor
Open in VTA2 circuit
Open in E2 circuit
VC and VTA2 circuit are short±circuited
ECM
Page 256 of 4323
DI±62
± DIAGNOSTICSENGINE
256 Author: Date:
2005 SEQUOIA (RM1146U)P0230
(DI±179)
Fuel Pump Primary Circuit
Open or short in fuel pump relay circuit
Fuel pump relay
Circuit opening relay
Fuel pump
ECM
±
P0300
(DI±184)Random/Multiple Cylinder Misfire
Detected
Open or short in engine wire
Connector connection
Vacuum hose connection
Ignition system
Injector
Fuel pressure
Mass air flow meter
Engine coolant temperature sensor
Compression pressure
Valve clearance
Valve timing
PCV piping
ECM
*2
P0301
(DI±184)Cylinder 1 Misfire Detected
Open or short in engine wire
Connector connection
Vacuum hose connection
Ignition system
Injector
Fuel pressure
Mass air flow meter
Engine coolant temperature sensor
Compression pressure
Valve clearance
Valve timing
PCV piping
ECM
*2
P0302
(DI±184)Cylinder 2 Misfire Detected
Open or short in engine wire
Connector connection
Vacuum hose connection
Ignition system
Injector
Fuel pressure
Mass air flow meter
Engine coolant temperature sensor
Compression pressure
Valve clearance
Valve timing
PCV piping
ECM
*2
P0303
(DI±184)Cylinder 3 Misfire Detected
Open or short in engine wire
Connector connection
Vacuum hose connection
Ignition system
Injector
Fuel pressure
Mass air flow meter
Engine coolant temperature sensor
Compression pressure
Valve clearance
Valve timing
PCV piping
ECM
*2
Page 257 of 4323
± DIAGNOSTICSENGINE
DI±63
257 Author: Date:
2005 SEQUOIA (RM1146U)P0304
(DI±184)
Cylinder 4 Misfire Detected
Open or short in engine wire
Connector connection
Vacuum hose connection
Ignition system
Injector
Fuel pressure
Mass air flow meter
Engine coolant temperature sensor
Compression pressure
Valve clearance
Valve timing
PCV piping
ECM
*2
P0305
(DI±184)Cylinder 5 Misfire Detected
Open or short in engine wire
Connector connection
Vacuum hose connection
Ignition system
Injector
Fuel pressure
Mass air flow meter
Engine coolant temperature sensor
Compression pressure
Valve clearance
Valve timing
PCV piping
ECM
*2
P0306
(DI±184)Cylinder 6 Misfire Detected
Open or short in engine wire
Connector connection
Vacuum hose connection
Ignition system
Injector
Fuel pressure
Mass air flow meter
Engine coolant temperature sensor
Compression pressure
Valve clearance
Valve timing
PCV piping
ECM
*2
P0307
(DI±184)Cylinder 7 Misfire Detected
Open or short in engine wire
Connector connection
Vacuum hose connection
Ignition system
Injector
Fuel pressure
Mass air flow meter
Engine coolant temperature sensor
Compression pressure
Valve clearance
Valve timing
PCV piping
ECM
*2
Page 258 of 4323
DI±64
± DIAGNOSTICSENGINE
258 Author: Date:
2005 SEQUOIA (RM1146U)P0308
(DI±184)
Cylinder 8 Misfire Detected
Open or short in engine wire
Connector connection
Vacuum hose connection
Ignition system
Injector
Fuel pressure
Mass air flow meter
Engine coolant temperature sensor
Compression pressure
Valve clearance
Valve timing
PCV piping
ECM
*2
P0325
(DI±204)Knock Sensor 1 Circuit (Bank 1
or Single Sensor)Open or short in knock sensor 1 circuit
Knock sensor 1 (looseness)
ECM
P0327
(DI±204)Knock Sensor 1 Circuit Low In-
put (Bank 1 or Single Sensor)Short in knock sensor circuit
Knock sensor
ECM
P0328
(DI±204)Knock Sensor 1 Circuit High In-
put (Bank 1 or Single Sensor)Open in knock sensor circuit
Knock sensor
ECM
P0330
(DI±204)Knock Sensor 2 Circuit (Bank 2)
Open or short in knock sensor 2 circuit
Knock sensor 2 (looseness)
ECM
P0332
(DI±204)Knock Sensor 2 Circuit High In-
put (Bank 2)Open in knock sensor circuit
Knock sensor
ECM
P0333
(DI±204)Knock Sensor 2 Circuit High In-
put (Bank 2)Open in knock sensor circuit
Knock sensor
ECM
P0335
(DI±210)Crankshaft Position Sensor ºAº
Circuit
Open or short in crankshaft position sensor circuit
Crankshaft position sensor
Signal plate
ECM
P0339
(DI±210)Crankshaft Position Sensor ºAº
Circuit Intermittent
Open or short in crankshaft position sensor circuit
Crankshaft position sensor
Signal plate
ECM
±
P0340
(DI±216)Camshaft Position Sensor ºAº
Circuit (Bank 1 or Single Sensor)
Open or short in camshaft position sensor circuit
Camshaft position sensor
LH camshaft timing pulley
Jumping teeth of timing belt
ECM
P0341
(DI±216)Camshaft Position Sensor ºAº
Circuit Range/Performance
(Bank 1 or Single Sensor)
Open or short in camshaft position sensor circuit
Camshaft position sensor
LH camshaft timing pulley
Jumping teeth of timing belt
ECM
P0345
(DI±221)Camshaft Position Sensor ºAº
Circuit (Bank 2)Open or short in camshaft position sensor circuit
VVT sensor
ECM
P0346
(DI±221)Camshaft Position Sensor ºAº
Circuit Range/Performance
(Bank 2)Open or short in camshaft position sensor circuit
VVT sensor
ECM
Page 259 of 4323
± DIAGNOSTICSENGINE
DI±65
259 Author: Date:
2005 SEQUOIA (RM1146U)P0351
(DI±221)
Ignition Coil ºAº Primary/Second-
ary Circuit
Open or short in IGF 1 and IGT 1 circuit from No. 1 ignition coil
with igniter to ECM
No. 1 ignition coil with igniter
Ignition system
ECM
P0352
(DI±221)Ignition Coil ºBº Primary/Second-
ary Circuit
Open or short in IGF 2 and IGT 2 circuit from No. 2 ignition coil
with igniter to ECM
No. 2 ignition coil with igniter
Ignition system
ECM
P0353
(DI±221)Ignition Coil ºCº Primary/Second-
ary Circuit
Open or short in IGF 2 and IGT 3 circuit from No. 3 ignition
coil with igniter to ECM
No. 3 ignition coil with igniter
Ignition system
ECM
P0354
(DI±221)Ignition Coil ºDº Primary/Second-
ary Circuit
Open or short in IGF 1 and IGT 4 circuit from No. 4 ignition coil
with igniter to ECM
No. 4 ignition coil with igniter
Ignition system
ECM
P0355
(DI±221)Ignition Coil ºEº Primary/Second-
ary Circuit
Open or short in IGF 2 and IGT 5 circuit from No. 5 ignition coil
with igniter to ECM
No. 5 ignition coil with igniter
Ignition system
ECM
P0356
(DI±221)Ignition Coil ºFº Primary/Second-
ary Circuit
Open or short in IGF 1 and IGT 6 circuit from No. 6 ignition coil
with igniter to ECM
No. 6 ignition coil with igniter
Ignition system
ECM
P0357
(DI±221)Ignition Coil ºGº Primary/Second-
ary Circuit
Open or short in IGF 1 and IGT 7 circuit from No. 7 ignition coil
with igniter to ECM
No. 7 ignition coil with igniter
Ignition system
ECM
P0358
(DI±221)Ignition Coil ºHº Primary/Second-
ary Circuit
Open or short in IGF 2 and IGT 8 circuit from No. 8 ignition coil
with igniter to ECM
No. 8 ignition coil with igniter
Ignition system
ECM
P0412
(DI±234)Air Injection System Air Switch-
ing Valve Malfunction
Open in air switching valve drive circuit
Short between air switching valve circuit and +B circuit
Air injection driver
ECM
P0418
(DI±242)Air Injection System Air Pump
Malfunction
Open in air pump drive circuit
Short between air pump circuit and +B circuit
Air injection driver
ECM
P0420
(DI±249)Catalyst System Efficiency Be-
low Threshold (Bank 1)Gas leakage on exhaust system
Heated oxygen sensor (bank 1 sensor 1, 2)
Three±way catalytic converter
P0430
(DI±249)Catalyst System Efficiency Be-
low Threshold (Bank 2)Gas leakage on exhaust system
Heated oxygen sensor (bank 2 sensor 1, 2)
Three±way catalytic converter
Page 260 of 4323
DI±66
± DIAGNOSTICSENGINE
260 Author: Date:
2005 SEQUOIA (RM1146U)P043E
(DI±445)
Evaporate Emission System
Reference Orifice Clog UpPump module
P043F
(DI±445)Evaporate Emission System
Reference Orifice High FlowPump module
P0441
(DI±257)Evaporative Emission Control
System Incorrect Purge Flow
Purge valve
Purge valve circuit (between purge valve and ECM)
Leakage from EVAP line (between purge valve and intake
manifold)
EVAP line (between purge valve and canister) clogged
ECM
P0450
(DI±264)Evaporative Emission Control
System Pressure Sensor/Switch
[Fuel Tank Pressure Sensor]
Pump module (including pressure sensor)
P0451
(DI±264)Evaporative Emission Control
System Pressure Sensor/Switch
Range/Performance
Pump module (including pressure sensor)
P0452
(DI±264)Evaporative Emission Control
System Pressure Sensor/Switch
Low InputPump module (including pressure sensor)
Connector/Wire harness (between pump module and ECM)
ECM
P0453
(DI±264)Evaporative Emission Control
System Pressure Sensor/Switch
High InputPump module (include pressure sensor)
Connector/Wire harness (between pump module and ECM)
ECM
P0455
(DI±273)Evaporative Emission Control
System Leak Detected (Gross
Leak)
Fuel tank cap (loose)
Leakage from EVAP line (between canister and fuel tank)
Leakage from EVAP line (between purge valve and canister)
Leakage from pump module
Leakage from fuel tank
Leakage from canister
P0456
(DI±273)Evaporative Emission Control
System Leak Detected (Very
Small Leak)
Same as DTC No. P0445
P0500
(DI±278)Vehicle Speed Sensor ºAº
Combination meter
Open or short in vehicle speed sensor circuit
Vehicle speed sensor
ECM
P0503
(DI±278)Vehicle Speed Sensor ºAº Inter-
mittent/Erratic/High
Combination meter
Open or short in vehicle speed sensor circuit
Vehicle speed sensor
ECM
±
P0504
(DI±283)Brake Switch ºAº/ºBº Correlation
Short in stop lamp switch signal circuit
STOP fuse
Stop lamp switch
ECM
±
P0505
(DI±288)Idle Air Control System
Air induction system
Electric throttle control system
PCV hose connection
P0560
(DI±292)System Voltage
Back±up power source circuit
EFI No. 1 fuse
ECM
P0604
(DI±296)Internal Control Module Random
Access Memory (RAM) ErrorECM
P0606
(DI±296)ECM/PCM ProcessorECM
P0607
(DI±296)Control Module PerformanceECM
Page 261 of 4323
± DIAGNOSTICSENGINE
DI±67
261 Author: Date:
2005 SEQUOIA (RM1146U)P0617
(DI±298)
Starter Relay Circuit High
Park/neutral position switch
Starter relay circuit
Ignition switch
ECM
P0630
(DI±302)VIN not Programmed or Mis-
match±ECM/PCMECM
P0657
(DI±296)Actuator Supply Voltage Circuit/
OpenECM
P0705
(DI±576)Transmission Range Sensor Cir-
cuit Malfunction (PRNDL Input)Electronic Controlled Automatic Transaxle (ECT)
P0710
(DI±582)Transmission Fluid Temperature
Sensor ºAº CircuitElectronic control automatic transmission (ECT)
P0711
(DI±588)Transmission Fluid Temperature
Sensor ºAº PerformanceElectronic control automatic transmission (ECT)
P0712
(DI±582)Transmission Fluid Temperature
Sensor ºAº Circuit Low InputElectronic control automatic transmission (ECT)
P0713
(DI±582)Transmission Fluid Temperature
Sensor ºAº Circuit High InputElectronic control automatic transmission (ECT)
P0717
(DI±591)Input/Turbine Speed Sensor ºAº
Circuit No SignalElectronic control automatic transmission (ECT)
P0722
(DI±596)Output Speed Sensor Circuit No
SignalElectronic control automatic transmission (ECT)
P0724
(DI±600)Brake Switch ºBº Circuit HighElectronic control automatic transmission (ECT)
P0748
(DI±603)Pressure Control Solenoid ºAº
Electrical (Shift Solenoid Valve
SL1)
Electronic control automatic transmission (ECT)
P0751
(DI±608)Shift Solenoid ºAº Performance
(Shift Solenoid Valve S1)Electronic control automatic transmission (ECT)
P0756
(DI±614)Shift Solenoid ºBº Performance
(Shift Solenoid Valve S2)Electronic control automatic transmission (ECT)
P0771
(DI±620)Shift Solenoid ºEº Performance
(Shift Solenoid Valve SR)Electronic control automatic transmission (ECT)
P0776
(DI±625)Pressure Control Solenoid ºBº
Performance (Shift Solenoid
Valve SL2)
Electronic control automatic transmission (ECT)
P0778
(DI±631)Pressure Control Solenoid ºBº
Electrical (Shift Solenoid Valve
SL2)
Electronic control automatic transmission (ECT)
P0781
(DI±636)1±2 Shift (1±2 Shift Valve)Electronic control automatic transmission (ECT)
P0973
(DI±641)Shift Solenoid ºAº Control Circuit
Low (Shift solenoid Valve S1)Electronic control automatic transmission (ECT)
P0974
(DI±641)Shift Solenoid ºAº Control Circuit
High (Shift solenoid Valve S1)Electronic control automatic transmission (ECT)
P0976
(DI±646)Shift Solenoid ºBº Control Circuit
Low (Shift solenoid Valve S2)Electronic control automatic transmission (ECT)
P0977
(DI±646)Shift Solenoid ºBº Control Circuit
High (Shift solenoid Valve S2)Electronic control automatic transmission (ECT)
P0985
(DI±651)Shift Solenoid ºEº Control Circuit
Low (Shift Solenoid Valve SR)Electronic control automatic transmission (ECT)