Toyota Tundra. Manual — part 1321

Circuit High Input



Open in VTA2
circuit



Open in E2
circuit



Short between
VC and VTA2
circuits



ECM

P0230

Fuel Pump Primary
Circuit



Open or short in
fuel pump
circuit



Fuel pump



Fuel pump ECU



ECM

-

DTC stored

Applies

P0300

Random/Multiple
Cylinder Misfire
Detected



Open or short in
engine wire
harness



Connector
connection



Vacuum hose
connections



Ignition system



Injector



Fuel pressure



Mass Air Flow
(MAF) meter



Engine Coolant
Temperature
(ECT) sensor



Compression
pressure



Valve clearance



Valve timing



PCV valve and
hose



PCV hose
connections



Air induction
system



ECM

Comes on/
Blinks*1

DTC stored

Applies

P0301

Cylinder 1 Misfire



Open or short in Comes on/

DTC stored

Applies

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra

Detected

engine wire
harness



Connector
connection



Vacuum hose
connections



Ignition system



Injector



Fuel pressure



Mass Air Flow
(MAF) meter



Engine Coolant
Temperature
(ECT) sensor



Compression
pressure



Valve clearance



Valve timing



PCV valve and
hose



PCV hose
connections



Air induction
system



ECM

Blinks*1

P0302

Cylinder 2 Misfire
Detected



Open or short in
engine wire
harness



Connector
connection



Vacuum hose
connections



Ignition system



Injector



Fuel pressure



Mass Air Flow
(MAF) meter



Engine Coolant
Temperature
(ECT) sensor



Compression

Comes on/
Blinks*1

DTC stored

Applies

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra

pressure



Valve clearance



Valve timing



PCV valve and
hose



PCV hose
connections



Air induction
system



ECM

P0303

Cylinder 3 Misfire
Detected



Open or short in
engine wire
harness



Connector
connection



Vacuum hose
connections



Ignition system



Injector



Fuel pressure



Mass Air Flow
(MAF) meter



Engine Coolant
Temperature
(ECT) sensor



Compression
pressure



Valve clearance



Valve timing



PCV valve and
hose



PCV hose
connections



Air induction
system



ECM

Comes on/
Blinks*1

DTC stored

Applies

P0304

Cylinder 4 Misfire
Detected



Open or short in
engine wire
harness



Connector
connection

Comes on/
Blinks*1

DTC stored

Applies

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra



Vacuum hose
connections



Ignition system



Injector



Fuel pressure



Mass Air Flow
(MAF) meter



Engine Coolant
Temperature
(ECT) sensor



Compression
pressure



Valve clearance



Valve timing



PCV valve and
hose



PCV hose
connections



Air induction
system



ECM

P0305

Cylinder 5 Misfire
Detected



Open or short in
engine wire
harness



Connector
connection



Vacuum hose
connections



Ignition system



Injector



Fuel pressure



Mass Air Flow
(MAF) meter



Engine Coolant
Temperature
(ECT) sensor



Compression
pressure



Valve clearance



Valve timing



PCV valve and

Comes on/
Blinks*1

DTC stored

Applies

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra