Mazda MPV 1999-06

2.5L V6 - Auto 2

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Trouble Code: P0174



Adaptive Fuel Trim Too Lean (Bank 2)

Possible Causes:



Vehicle driven low on fuel or until it ran out of fuel
 
One or more injectors restricted or pressure regulator has failed
 
Fuel delivery system supplying too much or too little fuel during cruise or idle periods (e.g., faulty fuel pump, or dirty fuel filter)
 
Air leaks after the MAF sensor, or air leaks in the PCV system
 
Air leaks at the EGR gasket, or at the EGR valve diaphragm
 
Exhaust leaks before or near where the front HO2S is mounted
 
HO2S is contaminated, deteriorated or it has failed
 
Fuel control sensor is out of calibration (i.e., ECT, IAT or MAP)
 
Base engine -mechanical- fault affecting one or more cylinders
 

Trouble Code: P0175



Adaptive Fuel Trim Too Rich (Bank 2)

Possible Causes:



One or more injectors leaking or pressure regulator is leaking
 
Fuel delivery system supplying too much fuel during cruise or idle periods (e.g., faulty fuel pump, or faulty pressure regulator)
 
Exhaust leaks before or near where the front HO2S is mounted
 
HO2S is contaminated, deteriorated or it has failed
 
EVAP system component has failed or canister fuel saturated
 
Fuel control sensor is out of calibration (i.e., ECT, IAT or MAP)
 
Base engine -mechanical- fault affecting one or more cylinders
 

Trouble Code: P0300



Multiple Misfire Detected

Possible Causes:



Base engine mechanical fault affecting one or more cylinders
 
CMP sensor is damaged or failed (problem may be intermittent)
 
Fuel metering fault that affects more than one cylinder
 
Fuel pressure too low or too high, fuel supply contaminated
 
EVAP system problem or the EVAP canister is fuel saturated
 
EGR valve is stuck open or the PCV system has a vacuum leak
 
Ignition system fault that affects more than one cylinder
 
MAF sensor is contaminated (this can cause a lean condition)
 

Trouble Code: P0301



Cylinder 1 Misfire Detected

Possible Causes:



Base engine mechanical fault affecting only Cylinder 1
 
CKP sensor is damaged or failed (problem may be intermittent)
 
Fuel metering fault that affects only Cylinder 1
 
Ignition system fault that affects only Cylinder 1
 

Trouble Code: P0302



Cylinder 2 Misfire Detected

Possible Causes:



Base engine mechanical fault affecting only Cylinder 2
 
CKP sensor is damaged or failed (problem may be intermittent)
 
Fuel metering fault that affects only Cylinder 2
 
Ignition system fault that affects only Cylinder 2
 

Trouble Code: P0303



Cylinder 3 Misfire Detected

Possible Causes:



Base engine mechanical fault affecting only Cylinder 3
 
CKP sensor is damaged or failed (problem may be intermittent)
 
Fuel metering fault that affects only Cylinder 3
 
Ignition system fault that affects only Cylinder 3
 

Trouble Code: P0304



Cylinder 4 Misfire Detected

Possible Causes:



Base engine mechanical fault affecting only Cylinder 4
 
CKP sensor is damaged or failed (problem may be intermittent)
 
Fuel metering fault that affects only Cylinder 4
 
Ignition system fault that affects only Cylinder 4
 

Trouble Code: P0305



Cylinder 5 Misfire Detected

Possible Causes:



Base engine mechanical fault affecting only Cylinder 5
 
CKP sensor is damaged or failed (problem may be intermittent)
 
Fuel metering fault that affects only Cylinder 5
 
Ignition system fault that affects only Cylinder 5
 

Trouble Code: P0306



Cylinder 6 Misfire Detected

Possible Causes:



Base engine mechanical fault affecting only Cylinder 6
 
CKP sensor is damaged or failed (problem may be intermittent)
 
Fuel metering fault that affects only Cylinder 6
 
Ignition system fault that affects only Cylinder 6
 

Trouble Code: P0325



Knock Sensor 1 Circuit Malfunction

Possible Causes:



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

Trouble Code: P0335



Crankshaft Position (NE) Sensor Circuit Malfunction

Possible Causes:



CKP sensor signal is open or shorted to ground
 
CKP sensor signal is shorted to VREF or system power (B+)
 
CKP sensor is damaged or has failed
 
Trigger wheel or tone wheel is damaged
 
PCM has failed
 

Trouble Code: P0421



Catalyst Efficiency Below Normal (Bank 1)

Possible Causes:



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

Trouble Code: P0431



Warm-up Catalyst Efficiency Below Normal (Bank 2)

Possible Causes:



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

Trouble Code: P0442



EVAP System Small Leak (0.040-) Detected

Possible Causes:



Fuel filler cap loose, cross-threaded, incorrect part or damaged
 
EVAP purge solenoid is damaged or has failed
 
EVAP charcoal canister is loaded with fuel or moisture
 
EVAP vent solenoid is damaged (it may be stuck partially open)
 
EVAP check valve or vapor valve is damaged or leaking
 
Vapor lines damaged or leaking between the purge solenoid and intake manifold, purge solenoid and canister, or between the canister vent solenoid, check valve and fuel vapor valve
 
PCM has failed
 

Trouble Code: P0443



EVAP Canister Purge Solenoid Circuit Malfunction

Possible Causes:



Purge solenoid control circuit is open or shorted to ground
 
Purge solenoid control circuit is shorted to system power (B+)
 
Purge solenoid power circuit is open or shorted to ground
 
Purge solenoid is damaged or has failed
 
PCM has failed (the purge solenoid driver may be damaged)
 

Trouble Code: P0451



EVAP Pressure Sensor Circuit Range/Performance

Possible Causes:



Air filter element or charcoal canister is very dirty or clogged
 
CDCV (valve) is damaged or has failed
 
Purge solenoid valve is damaged or has failed
 
Connection problems at the CDCV FTP sensor or at the PCM
 
CDCV (valve) or FTP sensor open or shorted in wiring harness
 
PCM has failed
 

Trouble Code: P0452



EVAP Pressure Sensor Circuit Low Input

Possible Causes:



FTP sensor signal circuit is shorted to sensor ground
 
FTP sensor signal circuit is shorted to chassis ground
 
FTP sensor signal is shorted in the connector due to moisture
 
FTP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0453



EVAP Pressure Sensor Circuit High Input

Possible Causes:



FTP sensor signal circuit is shorted to VREF or power (B+)
 
FTP sensor ground circuit is open
 
FTP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0455



EVAP System Large Leak (0.080-) Detected

Possible Causes:



Fuel filler cap loose, cross-threaded, incorrect part or damaged
 
Purge solenoid valve is damaged or has failed
 
Charcoal canister is loaded with fuel or moisture, or has failed
 
Canister drain cut valve (CDCV) is damaged or leaking
 
Tank pressure control valve (TPCV) is damaged or has failed
 
Vent cut valve is damaged, leaking or has failed
 
Catch tank or rollover valve is damaged, or fuel tank is leaking
 
Boost, ECT, MAP, MAF, VSS or TP sensor is out-of-calibration
 
Fuel tank level sensor is damaged or out-of-calibration
 
Fuel tank pressure sensor is damaged or out-of-calibration
 
Vapor line(s) damaged or leaking between the purge solenoid and intake manifold, CDCV and the canister, or between the TPCV and the tank, or the check valve and the rollover valve
 
PCM has failed
 

Trouble Code: P0456



EVAP System Small Leak (0.020-) Detected

Possible Causes:



Fuel filler cap loose, cross-threaded, incorrect part or damaged
 
Small holes or cuts in any of the vapor hoses and/or tubes
 
CV solenoid stuck part-way open while it is commanded closed
 
EVAP system component seals leaking at the purge valve, FTP sensor, CV solenoid, fuel vapor control valve or vapor vent tube
 
Fuel vapor hose or tube connections loose at the component
 
PCM has failed
 

Trouble Code: P0461



Fuel Level Indicator Signal Circuit Range/Performance

Possible Causes:



Fuel gauge sending unit is damaged or has failed
 
Fuel gauge sending unit signal is open or shorted to ground
 
Fuel gauge sending unit power circuit is open
 
Fuel gauge sender signal is shorted to fuel pump terminal
 
PCM has failed
 

Trouble Code: P0462



Fuel Level Sensor Circuit Low Input

Possible Causes:



Fuel gauge sending unit signal is shorted to sensor ground
 
Fuel gauge sending unit signal is shorted to chassis ground
 
Fuel gauge sending unit is damaged or has failed
 
PCM has failed
 

Trouble Code: P0463



Fuel Level Sensor Circuit High Input

Possible Causes:



Fuel gauge sending unit signal shorted to VREF or power
 
Fuel gauge sending unit ground circuit is open
 
Fuel gauge sender signal is damaged or has failed
 
PCM has failed
 

Trouble Code: P0464



Fuel Tank Level Sensor Circuit Malfunction

Possible Causes:



Fuel gauge sending unit is damaged or has failed
 
Fuel gauge sending unit signal is open or shorted to ground
 
PCM has failed
 

Trouble Code: P0500



Vehicle Speed Sensor Circuit Malfunction

Possible Causes:



VSS signal circuit is open, shorted to ground or to power
 
VSS power circuit is open or shorted to ground
 
VSS is damaged or has failed
 
PCM has failed
 

Trouble Code: P0506



Idle Control System RPM Lower Than Expected

Possible Causes:



Air intake system leaks (in the intake manifold or PCV valve)
 
IAC valve power circuit is open between main relay and valve
 
High resistance between PCM and IAC valve control circuits
 
IAC valve circuits open, shorted to ground or shorted to power
 
IAC valve air inlet is plugged, dirty or restricted
 
IAC valve is damaged or has failed
 
Throttle body is damaged or dirty (it may need to be cleaned)
 

Trouble Code: P0507



Idle Control System RPM Higher Than Expected

Possible Causes:



Air intake system leaks (in the intake manifold or PCV valve)
 
IAC valve power circuit is open between main relay and valve
 
High resistance between PCM and IAC valve control circuits
 
IAC valve circuits open, shorted to ground or shorted to power
 
IAC valve air inlet is plugged, dirty or restricted
 
IAC valve is damaged or has failed
 
Throttle body is damaged or dirty (it may need to be cleaned)
 

Trouble Code: P0550



Power Steering Pressure Switch Circuit Malfunction

Possible Causes:



Power steering switch signal circuit shorted to sensor ground
 
Power steering switch signal circuit shorted to chassis ground
 
Power steering switch is damaged or has failed
 
Engine Speed System (power steering function) is damaged
 
PCM has failed
 

Trouble Code: P0703



Brake On/Off Switch Circuit Malfunction

Possible Causes:



Brake switch signal circuit is open or shorted ground
 
Brake switch power circuit open between switch and battery (+)
 
Brake switch is damaged, misadjusted or installed improperly, or noise filter has failed
 
PCM has failed
 

Trouble Code: P0705



Transmission Range Switch Circuit Malfunction

Possible Causes:



TR signal -P- circuit shorted between switch and the PCM (12v)
 
TR signal -N- circuit shorted between switch and the PCM (12v)
 
TR signal -D- circuit shorted between switch and the PCM (12v)
 
TR signal -2- circuit shorted between switch and the PCM (12v)
 
TR signal -1- circuit shorted between switch and the PCM (12v)
 
TR switch or its connector is damaged, or the switch 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 -N- circuit open between the switch and the PCM (0v)
 
TR signal -2- circuit open between the switch and the PCM (0v)
 
TR signal -1- 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: P0710



Transmission Fluid Temperature Sensor Circuit Malfunction

Possible Causes:



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

Trouble Code: P0711



Transmission Fluid Temperature Sensor Circuit Range/Performance

Possible Causes:



TFT sensor signal circuit has a high resistance condition
 
TFT sensor ground circuit has a high resistance condition
 
TFT sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0715



Input Shaft or Turbine Shaft Sensor Circuit Malfunction

Possible Causes:



ISS/TSS (+) signal circuit is open (an intermittent fault)
 
ISS/TSS (+) signal circuit shorted to ground (intermittent fault)
 
ISS/TSS (-) signal circuit is open (an intermittent fault)
 
ISS/TSS (-) signal circuit shorted to ground (intermittent fault)
 
ISS/TSS 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
 

Trouble Code: P0733



Transmission 3rd 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 3-4 clutch is slipping (mechanical fault)
 
A/T 2-3 or the 3-4 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: P0734



Transmission 4th 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 2-4 brake bank or 3-4 clutch is slipping (mechanical fault)
 
A/T 1-2, 2-3 or 3-4 shift valve is stuck (mechanical fault)
 
A/T Pressure regulator, pressure modifier or solenoid reducing valve is stuck
 
PCM has failed
 

Trouble Code: P0740



Torque Converter Clutch System Malfunction

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
 
A/T control valve has failed (it may be stuck)
 
TCC solenoid valve or pressure control valve is stuck
 
TCC in the torque converter is slipping (mechanical fault)
 
TCC shift valve or converter relief valve is stuck
 
Pressure modifier or the pressure regulator valve is stuck
 
Solenoid reducing valve is stuck (mechanical fault)
 
PCM has failed
 

Trouble Code: P0743



Torque Converter Clutch Solenoid Circuit Malfunction

Possible Causes:



TCC control circuit is open (continuous high signal)
 
TCC control circuit is shorted to ground (continuous low signal)
 
TCC control circuit is shorted to system power (B+)
 
TCC solenoid is damaged or has failed
 
PCM has failed
 

 
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