Toyota Tacoma 2002-06

4.0L V6 - Std 2

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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: 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
 

Trouble Code: P2119



Throttle Actuator Control Throttle Body Performance

Possible Causes:



ETCS throttle control system
 
PCM has failed
 

Trouble Code: P2120



Throttle Pedal Position Sensor/Switch 'D' Circuit Malfunction

Possible Causes:



APP sensor signal circuit is open or shorted to ground
 
APP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P2121



Accelerator Pedal Position Sensor Signal Performance

Possible Causes:



APP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P2122



Throttle Pedal Position Sensor/Switch 'D' Circuit Low Input

Possible Causes:



APP sensor signal circuit is shorted to ground
 
APP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P2123



Throttle Pedal Position Sensor/Switch 'D' Circuit High Input

Possible Causes:



APP sensor signal circuit is open
 
APP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P2125



Throttle Pedal Position Sensor/Switch 'E' Circuit Malfunction

Possible Causes:



APP sensor signal circuit is open or shorted to ground
 
APP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P2127



Throttle Pedal Position Sensor/Switch 'E' Circuit Low Input

Possible Causes:



APP sensor signal circuit is shorted to ground
 
APP sensor has failed, or the PCM has failed
 

Trouble Code: P2128



Throttle Pedal Position Sensor/Switch 'E' Circuit High Input

Possible Causes:



APP sensor signal circuit is open
 
APP sensor is damaged or has failed
 
PCM has failed
 

 
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