Mazda Car 2002-04

3.0L V6 - Std 4

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Trouble Code: P2405



EVAP system leak detection pump sense circuit low input

Possible Causes:



EVAP system leak detection orifice has fallen off
 
EVAP system leak detection pump motor malfunction
 
PCM has failed
 

Trouble Code: P2407



EVAP system leak detection pump sense circuit intermittent

Possible Causes:



EVAP system leak detection pump heater malfunction
 
PCM has failed
 

Trouble Code: P2502



Charging system voltage problem

Possible Causes:



Open circuits between battery terminals
 
Battery is malfunctioning* Poor connection of PCM connectors
 
Generator malfunction
 
PCM has failed
 

Trouble Code: P2503



Charging system voltage low

Possible Causes:



Open circuits between battery terminals
 
Battery is malfunctioning* Poor connection of PCM connectors
 
Generator malfunction
 
PCM has failed
 

Trouble Code: P2504



Charging system voltage high

Possible Causes:



Short to power circuit between generator and PCM
 
Generator malfunction
 
PCM has failed
 

Trouble Code: P2507



PCM B+ voltage low

Possible Causes:



Melt down fuse* Poor connection of PCM
 
PCM has failed
 

Trouble Code: P2676



Variable Air Duct (VAD) control solenoid valve circuit low input

Possible Causes:



Open circuits between main relay and VAD terminals
 
Short circuits between VAD terminals and PCM terminals* Poor connection of PCM connector
 
VAD solenoid valve malfunction
 
PCM has failed
 

Trouble Code: P2677



Variable Air Duct (VAD) control solenoid valve circuit high input

Possible Causes:



Open circuits between main relay and VAD terminals
 
Short circuits between VAD terminals and PCM terminals* Poor connection of PCM connector
 
VAD solenoid valve malfunction
 
PCM has failed
 

Trouble Code: P0100



MAF or VAF Sensor Circuit Malfunction

Possible Causes:



MAF sensor signal circuit is open or shorted to ground
 
MAF sensor power circuit is open or the ground circuit is open
 
MAF sensor is damaged or has failed
 
PCM has failed
 
TSB SSP056 (2/02) contains a MAF sensor warranty (Protégé)
 

Trouble Code: P0140



HO2S-12 (Bank 1 Sensor 2) Circuit No Activity Detected

Possible Causes:



Air leaks in the intake manifold or exhaust manifold or pipes
 
IAT sensor or MAF sensor has deteriorated (out of calibration)
 
HO2S signal circuit is open or shorted to ground
 
HO2S contaminated with wrong fuel, has deteriorated or failed
 
TSB 0100700 (3/00) contains information for this code ()
 

Trouble Code: P0638



Throttle Actuator Control Range Performance

Possible Causes:



PCM internal malfunction* Throttle Body malfunction
 

Trouble Code: P2004



Variable Tumble Control System (VTCS) shutter valve stuck open

Possible Causes:



VTCS shutter valve malfunction (stuck open)
 
Misconnecting or pull out the vacuum hose
 
Variable tumble control valve malfunction
 
PCM has failed
 

Trouble Code: P2507



PCM B+ voltage low

Possible Causes:



Melt down fuse
 
Poor connection of PCM
 
PCM has failed
 

Trouble Code: P2676



Variable Air Duct (VAD) control solenoid valve circuit low input

Possible Causes:



Open circuits between main relay and VAD terminals
 
Short circuits between VAD terminals and PCM terminals
 
Poor connection of PCM connector
 
VAD solenoid valve malfunction
 
PCM has failed
 

Trouble Code: P2677



Variable Air Duct (VAD) control solenoid valve circuit high input

Possible Causes:



Open circuits between main relay and VAD terminals
 
Short circuits between VAD terminals and PCM terminals
 
Poor connection of PCM connector
 
VAD solenoid valve malfunction
 
PCM has failed
 

 
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