Toyota Tundra 2001-06

4.0L V6 - Auto 2

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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: P0325



Knock Sensor 1 Circuit Malfunction

Possible Causes:



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, not tightened properly or has failed
 
PCM has failed
 

Trouble Code: P0330



Knock Sensor 2 Circuit Malfunction

Possible Causes:



Knock sensor signal circuit is open, shorted to ground or VREF
 
Knock sensor is damaged, not tightened properly 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
 

Trouble Code: P0339



Crankshaft Position Sensor 'A' Circuit Intermittent

Possible Causes:



CKP sensor signal circuit is open, shorted to ground or power
 
CKP Sensor signal ground circuit is open
 
Crankshaft timing pulley is damaged or out of alignment
 
CKP Sensor has failed, or the PCM has failed
 

Trouble Code: P0340



Camshaft Position Sensor Circuit Malfunction

Possible Causes:



CMP sensor signal circuit is open, shorted to ground or power
 
CMP sensor signal ground circuit is open
 
CMP sensor has failed, or the PCM has failed
 

Trouble Code: P0341



Camshaft Position Sensor 'A' Signal Range/Performance

Possible Causes:



CMP sensor signal circuit is open, shorted to ground or power
 
CMP sensor pulley is damaged, or timing belt has jumped teeth
 
CMP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0351



Ignition Coil No. 1 Primary/Secondary Circuit Malfunction

Possible Causes:



IGT1 circuit is open or shorted to ground
 
Ignition Coil No. 1 is damaged or it has failed
 
Problem present in the Ignition System
 
PCM has failed
 

Trouble Code: P0352



Ignition Coil No. 2 Primary/Secondary Circuit Malfunction

Possible Causes:



IGT2 circuit is open or shorted to ground
 
Ignition Coil No. 2 is damaged or it has failed
 
Problem present in the Ignition System
 
PCM has failed
 

Trouble Code: P0353



Ignition Coil No. 3 Primary/Secondary Circuit Malfunction

Possible Causes:



IGT3 circuit is open or shorted to ground
 
Ignition Coil No. 3 is damaged or it has failed
 
Problem present in the Ignition System
 
PCM has failed
 

Trouble Code: P0354



Ignition Coil No. 4 Primary/Secondary Circuit Malfunction

Possible Causes:



IGT4 circuit is open or shorted to ground
 
Ignition Coil No. 4 is damaged or it has failed
 
Problem present in the Ignition System
 
PCM has failed
 

Trouble Code: P0355



Ignition Coil No. 5 Primary/Secondary Circuit Malfunction

Possible Causes:



IGT5 circuit is open or shorted to ground
 
Ignition Coil No. 5 is damaged or it has failed
 
Problem present in the Ignition System
 
PCM has failed
 

Trouble Code: P0356



Ignition Coil No. 6 Primary/Secondary Circuit Malfunction

Possible Causes:



IGT6 circuit is open or shorted to ground
 
Ignition Coil No. 6 is damaged or it has failed
 
Problem present in the Ignition System
 
PCM has failed
 

Trouble Code: P0420



Catalyst Efficiency Below Normal (Bank 1)

Possible Causes:



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

Trouble Code: P0430



Catalyst Efficiency Below Normal (Bank 2)

Possible Causes:



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

Trouble Code: P0441



EVAP System Incorrect Purge Flow Detected

Possible Causes:



Charcoal canister is clogged, loaded with fuel or with moisture
 
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 is damaged or has failed
 
VSV circuit for the canister purge, VSV for the CCV or the VSV for the pressure switching valve is open or shorted to ground
 
VSV for the vapor pressure sensor circuit is open or shorted to ground, or the vapor pressure sensor is damaged or 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: P0450



EVAP Vapor Pressure Sensor Circuit Malfunction

Possible Causes:



Vapor pressure sensor signal circuit open or shorted to ground
 
Vapor pressure sensor ground circuit is open
 
Vapor pressure sensor power circuit is open
 
Vapor pressure sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0451



EVAP Vapor Pressure Sensor Range/Performance

Possible Causes:



Vapor pressure sensor vacuum hoses loose or damaged
 
Vapor pressure sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0452



EVAP Vapor Pressure Sensor Circuit Low Input

Possible Causes:



Vapor pressure sensor connector is damaged or open
 
Vapor pressure sensor circuit is open
 
Vapor pressure sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0453



EVAP Vapor Pressure Sensor Circuit High Input

Possible Causes:



Vapor pressure sensor connector is damaged or shorted
 
Vapor pressure sensor circuit is shorted to VREF
 
Vapor pressure sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0456



EVAP System Very Small Leak (0.020") 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 tank overfill check valve is cracked or is damaged
 
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 between the meter and the PCM
 
VSS signal circuit shorted to ground between meter and PCM
 
VSS No. 1 is damaged or has failed
 
Combination Meter is damaged or has failed
 
PCM has failed
 

Trouble Code: P0503



Vehicle Speed Sensor 'A' Signal Erratic Or Intermittent

Possible Causes:



ABS ECU is damaged or has failed
 
Combination Meter is damaged or has failed
 
VSS signal circuit is open between the meter and the PCM
 
VSS signal circuit shorted to ground between meter and PCM
 

Trouble Code: P0504



Brake Switch 'A' To 'B' Correlation Malfunction

Possible Causes:



Stoplight switch signal circuit is shorted to power
 
Stoplight switch assembly is damaged or shorted
 
PCM has failed
 

Trouble Code: P0505



Idle Control System Malfunction

Possible Causes:



Air Induction system leaks (check for intake manifold leaks)
 
Air leaks in the PCV system (at the valve or its related hoses)
 
Throttle body assembly is damaged or has failed
 
PCM has failed
 

Trouble Code: P0560



System Voltage (Backup Power Circuit) Malfunction

Possible Causes:



Battery backup circuit is open between battery and the PCM
 
PCM has failed
 

Trouble Code: P0604



PCM Internal Control Module Random Access Memory Processing Error

Possible Causes:



Clear the codes and retest for this code. If the same code resets, substitute a known good control module and retest. If the trouble code is gone, the original PCM has failed.TSB TC002-03 (6/03) contains information related to this code
 

Trouble Code: P0606



ECM/PCM Processing Error

Possible Causes:



Clear the codes and retest for this code. If the same code resets, substitute a known good control module and retest. If the trouble code is gone, the original PCM has failed.TSB TC002-03 (6/03) contains information related to this code
 

Trouble Code: P0607



Control Module Performance

Possible Causes:



Clear the codes and retest for this code. If the same code resets, substitute a known good control module and retest. If the trouble code is gone, the original PCM has failed.TSB TC002-03 (6/03) contains information related to this code
 

Trouble Code: P0617



Starter Relay Circuit High Input

Possible Causes:



Park/Neutral switch assembly is damaged or it has failedIgnition switch is damaged or has failed
 
PCM has failed
 

Trouble Code: P0657



PCM Actuator Supply Voltage Circuit Malfunction

Possible Causes:



Actuator supply voltage circuit is open
 
Clear the codes and retest for this code. If the same code resets, substitute a known good control module and retest. If the trouble code is gone, the original PCM has failed.
 
TSB TC002-03 (6/03) contains information related to this code
 

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: 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: P2102



Throttle Actuator Control Motor Circuit Low Input

Possible Causes:



Throttle motor connector is damaged or open
 
Throttle control motor circuit is open
 
Throttle control motor is damaged or has failed
 
PCM has failed
 

Trouble Code: P2103



Throttle Actuator Control Motor Circuit High Input

Possible Causes:



Throttle motor connector is damaged or shorted
 
Throttle control motor circuit is shorted
 
Throttle control motor is damaged or has failed
 
PCM has failed
 

Trouble Code: P2111



Throttle Actuator Control System Stuck Open

Possible Causes:



Throttle control motor circuit is open
 
Throttle control motor is damaged or has failed
 
Throttle body or throttle valve is damaged or has failed
 

Trouble Code: P2112



Throttle Actuator Control System Stuck Closed

Possible Causes:



Throttle control motor circuit is shorted
 
Throttle control motor is damaged or has failed
 
Throttle body or throttle valve is damaged or has failed
 

Trouble Code: P2118



Throttle Actuator Control Motor Current Performance

Possible Causes:



ETCS power source circuit is open
 
PCM has failed
 

 
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