Mazda Car 2002-04

2.3L L4 - Auto 4

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Trouble Code: P2401



EVAP system leak detection pump motor circuit low

Possible Causes:



EVAP system leak detection pump malfunction
 
Poor connection of EVAP system or PCM connector
 
PCM has failed
 

Trouble Code: P2402



EVAP system leak detection pump motor circuit low

Possible Causes:



EVAP system leak detection pump malfunction
 
Poor connection of EVAP system or PCM connector
 
PCM has failed
 

Trouble Code: P2404



EVAP system leak detection pump sense circuit problem

Possible Causes:



Air filter clogging
 
EVAP hose bending
 
PCM has failed
 

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: U0101



Data Circuit Malfunction

Possible Causes:



SCP data bus to other controller(s) is open or shorted to ground
 
A/C System controller is damaged or has failed
 
PCM has failed
 

Trouble Code: U0121



Data Circuit Malfunction

Possible Causes:



SCP data bus to other controller(s) is open or shorted to ground
 
A/C System controller is damaged or has failed
 
PCM has failed
 

Trouble Code: U0155



Data Circuit Malfunction

Possible Causes:



SCP data bus to other controller(s) is open or shorted to ground
 
A/C System controller is damaged or has failed
 
PCM has failed
 

Trouble Code: U0167



Data Circuit Malfunction

Possible Causes:



SCP data bus to other controller(s) is open or shorted to ground
 
A/C System controller is damaged or has failed
 
PCM has failed
 

Trouble Code: U0302



Data Circuit Malfunction

Possible Causes:



SCP data bus to other controller(s) is open or shorted to ground
 
A/C System controller is damaged or has failed
 
PCM has failed
 

Trouble Code: U1020



Data Circuit Malfunction

Possible Causes:



SCP data bus to other controller(s) is open or shorted to ground
 
A/C System controller is damaged or has failed
 
PCM has failed
 

Trouble Code: U1039



Data Circuit Malfunction

Possible Causes:



SCP data bus to other controller(s) is open or shorted to ground
 
Vehicle Speed System controller is damaged or has failed
 
PCM has failed
 

Trouble Code: U1040



Data Circuit Malfunction

Possible Causes:



SCP data bus to other controller(s) is open or shorted to ground
 
Vehicle Speed System controller is damaged or has failed
 
PCM has failed
 

Trouble Code: U1051



Data Circuit Malfunction

Possible Causes:



SCP data bus to other controller(s) is open or shorted to ground
 
ABS System controller is damaged or has failed
 
PCM has failed
 

Trouble Code: U1131



Data Circuit Malfunction

Possible Causes:



SCP data bus to other controller(s) is open or shorted to ground
 
Fuel System controller is damaged or has failed
 
PCM has failed
 

Trouble Code: U1147



Data Circuit Malfunction

Possible Causes:



SCP data bus to other controller(s) is open or shorted to ground
 
Vehicle Security System controller is damaged or has failed
 
PCM has failed
 

Trouble Code: U1451



Data Circuit Malfunction

Possible Causes:



SCP data bus to other controller(s) is open or shorted to ground
 
Anti-Theft System controller is damaged or has failed
 
PCM has failed
 

Trouble Code: U1262



Data Circuit Malfunction

Possible Causes:



SCP data bus to other controller(s) is open or shorted to ground
 
Anti-Theft System controller is damaged or has failed
 
PCM has failed
 

Trouble Code: U1900



Data Circuit Malfunction

Possible Causes:



SCP data bus to other controller(s) is open or shorted to ground
 
Vehicle Security System controller is damaged or has failed
 
PCM has failed
 

Trouble Code: U2013



Data Circuit Malfunction

Possible Causes:



SCP data bus to other controller(s) is open or shorted to ground
 
Vehicle Security System controller is damaged or has failed
 
PCM has failed
 

Trouble Code: U2023



Data Circuit Malfunction

Possible Causes:



SCP data bus to other controller(s) is open or shorted to ground
 
Vehicle Security System controller is damaged or has failed
 
PCM has failed
 

Trouble Code: U2050



Data Circuit Malfunction

Possible Causes:



SCP data bus to other controller(s) is open or shorted to ground
 
Vehicle Security System controller is damaged or has failed
 
PCM has failed
 

Trouble Code: U2051



Data Circuit Malfunction

Possible Causes:



SCP data bus to other controller(s) is open or shorted to ground
 
Vehicle Security System controller is damaged or has failed
 
PCM has failed
 

Trouble Code: U2243



Data Circuit Malfunction

Possible Causes:



SCP data bus to other controller(s) is open or shorted to ground
 
Vehicle Security System controller is damaged or has failed
 
PCM has failed
 

Trouble Code: P0706



Transmission Range Switch Circuit Malfunction

Possible Causes:



TR signal -P- circuit open between the switch and the PCM (0v)
 
TR signal -D- circuit open between the switch and the PCM (0v)
 
TR signal -S- circuit open between the switch and the PCM (0v)
 
TR signal -L- circuit open between the switch and the PCM (0v)
 
TR switch or its connector is damaged, or the switch has failed
 
PCM has failed
 

Trouble Code: P0707



Transmission Range Switch Range/Performance

Possible Causes:



TR switch signal circuit is shorted to another switch signal
 
TR switch signal circuit is open (problem may be intermittent)
 
TR switch is damaged, out of adjustment or it has failed
 
PCM has failed
 

Trouble Code: P0708



Transmission Range Switch Circuit Malfunction

Possible Causes:



TR switch signal circuit is open between the switch and PCM
 
TR switch signal circuit is shorted between switch and PCM
 
TR switch signal circuit is shorted to VREF or system power
 
TR switch ground circuit is open between switch and ground
 
TR switch or its connector is damaged, or the switch has failed
 
PCM has failed
 

Trouble Code: P0711



Transmission Fluid Temperature Sensor Circuit Range/Performance

Possible Causes:



TFT sensor signal circuit is open between sensor and the PCM
 
TFT sensor signal circuit is shorted to ground
 
TFT sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0712



Transmission Fluid Temperature Sensor Low Input (High Temperature)

Possible Causes:



TFT sensor signal circuit has a short toe ground condition
 
TFT sensor is damaged or has failed (it may be shorted)
 
PCM has failed
 

Trouble Code: P0713



Transmission Fluid Temperature Sensor High Input (Low Temperature)

Possible Causes:



TFT sensor signal circuit is open between sensor and the PCM
 
TFT sensor signal circuit has a short to power condition
 
TFT sensor is damaged or has failed (it may be open)
 
PCM has failed
 

Trouble Code: P0715



Turbine Shaft Sensor Circuit Malfunction

Possible Causes:



TSS (+) signal circuit is open (an intermittent fault)
 
TSS (+) signal circuit shorted to ground (intermittent fault)
 
TSS (-) signal circuit is open (an intermittent fault)
 
TSS (-) signal circuit shorted to ground (intermittent fault)
 
TSS is damaged or has failed
 
PCM has failed
 

Trouble Code: P0720



Output Shaft Sensor Circuit Malfunction

Possible Causes:



OSS (+) signal circuit is open or shorted to ground
 
OSS (-) signal circuit is open or shorted to ground
 
OSS is damaged or has failed
 
PCM has failed
 

Trouble Code: P0731



Transmission 1st Gear Ratio Incorrect

Possible Causes:



ATF level is too low, or the ATF is badly deteriorated
 
A/T line pressure is low, or the oil pump has failed
 
SSA, SSB, SSC or the PCS is stuck (mechanical fault)
 
A/T 1-2 clutch is slipping (mechanical fault)
 
A/T 1-2 shift valve is stuck (mechanical fault)
 
A/T Pressure regulator or the pressure modifier valve is stuck
 
A/T solenoid reducing valve is stuck (mechanical fault)
 
PCM has failed
 

Trouble Code: P0732



Transmission 2nd Gear Ratio Incorrect

Possible Causes:



ATF level is too low, or the ATF is badly deteriorated
 
A/T line pressure is low, or the oil pump has failed
 
SSA, SSB, SSC or the PCS is stuck (mechanical fault)
 
A/T 2-3 clutch is slipping (mechanical fault)
 
A/T 1-2 or the 2-3 shift valve is stuck (mechanical fault)
 
A/T Pressure regulator or the pressure modifier valve is stuck
 
A/T solenoid reducing valve is stuck (mechanical fault)
 
PCM has failed
 

 
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