Mazda MPV 1999-06

3.0L V6 - Auto 2

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Trouble Code: P0155



HO2S-21 (B2 S1) Heater Circuit Conditions

Possible Causes:



HO2S heater control circuit is open or shorted to ground
 
HO2S heater control circuit is shorted to system power (B+)
 
HO2S heater power circuit open between the heater and PCM
 
HO2S heater is damaged or has failed
 
PCM has failed (it controls the heater with a duty cycle signal)
 

Trouble Code: P0158



HO2S-22 (Bank 2 Sensor 2) Circuit High Input

Possible Causes:



Air leaks at the exhaust manifold or exhaust pipes
 
HO2S signal tracking (wet/oily) in connector causing a short between the signal circuit and heater power circuit
 
HO2S contaminated with wrong fuel, has deteriorated or failed
 
PCM has failed
 

Trouble Code: P0171



Adaptive Fuel Trim Too Lean (Bank 1)

Possible Causes:



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

Trouble Code: P0172



Adaptive Fuel Trim Too Rich (Bank 1)

Possible Causes:



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

Trouble Code: P0171



Adaptive Fuel Trim Too Lean (Bank 1)

Possible Causes:



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
 
Base engine -mechanical- fault affecting one or more cylinders
 
Fuel delivery system supplying too little fuel during cruise or idle speed (weak fuel pump, dirty/leaking fuel injector)
 
Exhaust leaks before or near where the front HO2S is mounted
 
HO2S is contaminated, deteriorated or it has failed
 
Vehicle driven low on fuel or driven until it ran out of fuel
 

Trouble Code: P0172



Adaptive Fuel Trim Too Rich (Bank 1)

Possible Causes:



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

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



Random 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: 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: 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: 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: P0446



EVAP System Vent Control Malfunction

Possible Causes:



Canister drain cut valve (CDCV) is damaged, sticking or failed
 
Tank pressure control valve (TPCV) is damaged or has failed
 
Charcoal canister is loaded with fuel or moisture
 
Air filter is severely restricted, or 2-way check valve is clogged
 
FTP sensor signal circuit is open, shorted to ground or to power
 
FTP sensor power circuit is open or shorted to ground
 
FTP sensor is damaged or has failed
 
BARO, ECT, IAT, MAF, VSS or TP sensor is out-of-calibration
 
Fuel tank level sensor is damaged or out-of-calibration
 
Fuel vapor line(s) kinked or blocked between the CDVC valve and intake manifold, or between the TPCV and the canister
 

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
 
EVAP purge solenoid is damaged or has failed
 
EVAP charcoal canister is loaded with fuel or moisture
 
Canister drain cut valve (CDCV) is damaged or leaking
 
EVAP catch tank or rollover valve is damaged or leaking
 
Vapor line(s) damaged or leaking between the purge solenoid and intake manifold, purge solenoid and canister, or between the pressure control valve, check valve and 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: P0511



PCM - Idle Air Control (IAC) valve assembly

Possible Causes:



IAC output circuit is open or shorted to ground
 
IAC output circuit is shorted to system power
 
IAC valve assembly is damaged or has failed
 
PCM has failed
 

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: P0602



PCM programming error

Possible Causes:



Reprogramming has not been completed properly
 
PCM has failed
 

Trouble Code: P0610



Control Module performance

Possible Causes:



PCM internal malfunction* Configuration has not been properly completed.
 

Trouble Code: P0660



Variable Inertia Charging System Circuit Malfunction

Possible Causes:



VICS control circuit is open or shorted to ground
 
VICS power circuit is open (check the power from the relay)
 
VICS valve is damaged or has failed
 
PCM has failed
 

Trouble Code: P0661



Variable intake-air system (VIS) control solenoid valve circuit low input

Possible Causes:



VIS control valve malfunction
 
Connector or terminal malfunction
 
Open circuit between VIS and PSM
 
PCM has failed
 

Trouble Code: P0662



Variable intake-air system (VIS) control solenoid valve circuit high input

Possible Causes:



VIS control valve malfunction
 
Connector or terminal malfunction
 
Open circuit between VIS and PSM
 
PCM has failed
 

 
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