Mazda Tribute 2001-06

2.0L L4 - Auto 4

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Trouble Code: P1406



DPFE Sensor Downstream Hose Off or Plugged

Possible Causes:



DPF EGR sensor downstream hose is disconnected
 
DPF EGR sensor downstream hose is plugged (ice)
 
EGR orifice tube is plugged or damaged
 

Trouble Code: P1408



EGR System Flow Out Of Range (Self-Test)

Possible Causes:



EGR valve stuck closed or iced up, or the flow path is restricted
 
EGR valve diaphragm leaking, hose is off, plugged or leaking
 
EGR system vacuum lines are loose or damaged
 
EGRA solenoid is damaged or has failed
 
EGRV solenoid is damaged or has failed
 
PCM has failed
 

Trouble Code: P1409



EGR Vacuum Regulator Solenoid Circuit Malfunction

Possible Causes:



EGR VR solenoid control circuit is open
 
EGR VR solenoid control circuit is shorted to ground
 
EGR VR solenoid control circuit is shorted to system power
 
EGR VR solenoid is damaged or has failed
 
PCM has failed
 

Trouble Code: P1443



EVAP System Purge Flow Malfunction

Possible Causes:



Fuel vapor hose blocked between EVAP purge valve and FTP sensor, or blocked between purge valve and intake manifold, or vacuum hose blocked between purge valve and intake manifold
 
EVAP canister purge solenoid stuck closed (mechanically)
 

Trouble Code: P1450



EVAP Control System Excessive Vacuum Detected

Possible Causes:



Air filter element is extremely dirty or clogged
 
Canister drain cut valve (CDCV) is damaged or has failed
 
Charcoal canister is full of fuel or moisture, or is damaged
 
EVAP system drain passage is clogged
 
Fuel tank pressure sensor is damaged or out-of-calibration
 
Purge solenoid valve is damaged or has failed
 

Trouble Code: P1451



Canister Vent Solenoid Circuit Malfunction

Possible Causes:



CV solenoid control circuit is open or shorted to ground
 
CV solenoid control circuit is shorted to system power (B+)
 
CV solenoid is damaged or has failed
 
PCM has failed
 

Trouble Code: P1460



Wide Open Throttle A/C Cut-Off Relay Circuit Malfunction

Possible Causes:



A/C relay is damaged or has failed
 
A/C relay power circuit is open between relay and ENGINE fuse
 
A/C relay control circuit is open between the relay and the PCM
 
A/C relay control circuit is shorted to ground
 
A/C relay control circuit is shorted to system power (B+)
 
PCM has failed
 

Trouble Code: P1464



A/C Control Signal Circuit Malfunction (Self-Test)

Possible Causes:



A/C relay control circuit is shorted to system power (B+)
 
A/C relay is damaged or has failed
 
A/C WOT relay is damaged or has failed
 
A/C clutch is damaged or has failed
 
PCM has failed
 

Trouble Code: P1474



Low Fan Relay Control Circuit Malfunction

Possible Causes:



LFC relay circuit is open or shorted to ground
 
LFC relay circuit is shorted to system power (B+)
 
LFC relay is shorted or damaged
 
PCM has failed
 

Trouble Code: P1477



Medium Fan Relay Control Circuit Malfunction

Possible Causes:



MFC relay circuit is open or shorted to ground
 
MFC relay circuit is shorted to system power (B+)
 
MFC relay is damaged or has failed
 
PCM has failed
 

Trouble Code: P1479



High Fan Control Relay Circuit Malfunction

Possible Causes:



HFC relay circuit is open or shorted to ground
 
HFC relay circuit is shorted to system power (B+)
 
HFC relay is shorted or damaged
 
PCM has failed
 

Trouble Code: P1500



Vehicle Speed Sensor Intermittent Signal

Possible Causes:



VSS signal circuit is open (an intermittent fault)
 
VSS signal circuit is shorted to ground (an intermittent fault)
 
VSS signal circuit is shorted to VREF (an intermittent fault)
 
VSS is damaged or has failed
 
PCM has failed
 

Trouble Code: P1501



Vehicle Speed Sensor Circuit Malfunction (Self-Test)

Possible Causes:



Charging system problem (check alternator for AC leakage)
 
Ignition system component has failed (i.e., check for signs of primary or secondary voltage leaking from the coil, coil wire, spark plug wires or boots, or the spark plug insulators
 
PCM has failed
 

Trouble Code: P1504



Idle Air Control Solenoid Circuit Malfunction

Possible Causes:



IAC solenoid control circuit shorted to ground
 
IAC solenoid is damaged or has failed
 
PCM has failed
 

Trouble Code: P1506



Idle Air Control System RPM Higher Than Expected

Possible Causes:



EGR valve is stuck open or leaking, or the gasket is leaking
 
EVAP purge valve is leaking or stuck in open position
 
IAC solenoid control circuit is shorted to ground (intermittent)
 
IAC valve is stuck open (it may be dirty or have failed)
 
PCV valve is leaking, or a leak in the intake manifold exists
 
PCM has failed
 

Trouble Code: P1507



Idle Air Control System RPM Lower Than Expected

Possible Causes:



Air filter element is severely restricted, or air inlet is plugged
 
Base engine problems: cylinder compression or valve timing
 
IAC valve is stuck in one position (it may be dirty or has failed)
 
IAC solenoid or valve is damaged or has failed
 
Throttle body is dirty, damaged or contaminated
 
PCM has failed
 

Trouble Code: P1605



PCM Keep Alive Memory or Read Only Memory Test Error

Possible Causes:



Battery cables are loose, or the connections are corroded
 
Keep Alive Power circuit to the PCM is shorted to ground
 
Keep Alive Power circuit to the PCM is open (intermittent fault)
 
PCM has failed
 

Trouble Code: P1633



PCM Long Term Memory Interruption

Possible Causes:



KAM circuit is open between battery and the PCM connector
 
KAM circuit is shorted to ground (check for a blown fuse)
 
KAM circuit has high resistance at the battery connections
 
PCM has failed
 

Trouble Code: P1650



Power Steering Pressure Switch Circuit Malfunction (Self-Test)

Possible Causes:



PSP signal circuit is open or shorted to ground
 
PSPS ground circuit is open (at the switch mounting point)
 
PSPS is damaged or has failed
 
PCM has failed
 

Trouble Code: P1651



Power Steering Pressure Switch Circuit Malfunction

Possible Causes:



PSP signal circuit is open or shorted to ground
 
PSPS ground circuit is open (at the switch mounting point)
 
PSPS is damaged or has failed
 
PCM has failed
 

Trouble Code: P1702



Transmission Range Sensor Circuit Malfunction

Possible Causes:



TR sensor signal circuit is open (an intermittent fault)
 
TR sensor signal circuit is shorted to ground (intermittent fault)
 
TR sensor signal circuit is shorted to VREF (intermittent fault)
 
TR sensor is damaged or has failed (an intermittent fault)
 
PCM has failed
 

Trouble Code: P1703



Brake Switch Circuit Malfunction (Self-Test)

Possible Causes:



Brake not depressed at the proper time during KOEO Self-Test.
 
Brake was depressed at all times during the KOEO Self-Test.
 
Brake was not cycled "on" and "off" during the KOER Self-Test.
 
Brake switch signal circuit shorted to system power (B+)
 
Brake switch is damaged or has failed, or is out of adjustment
 
PCM has failed
 

Trouble Code: P1705



Digital Transmission Range Sensor Circuit Malfunction (Self-Test)

Possible Causes:



The gear selector was not In Park during the Self-Test
 
TR switch is damaged, has failed or is out of adjustment
 
Starter or starter relay is damaged or has failed
 
Backup lamp circuit is open or shorted
 
PCM had failed
 

Trouble Code: P1711



Transaxle Fluid Temperature Sensor Circuit Malfunction (Self-Test)

Possible Causes:



ATF level is too low
 
ATF temperature not at operating temperature during the test
 
TFT sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P1713



Transaxle Fluid Temperature Sensor Circuit Malfunction

Possible Causes:



ATF level is low, or the fluid is contaminated
 
TFT sensor is damaged (it may be out-of-calibration)
 
TFT sensor signal circuit shorted to ground (intermittent fault)
 
PCM has failed
 

Trouble Code: P1714



Transmission Shift Solenoid 'A' Mechanical Malfunction

Possible Causes:



ATF level is low, or the fluid is contaminated
 
SSA has failed (mechanically) or is damaged
 
PCM has failed
 

Trouble Code: P1715



Transmission Shift Solenoid 'B' Mechanical Malfunction

Possible Causes:



ATF level is low, or the fluid is contaminated
 
SSB has failed (mechanically) or is damaged
 
PCM has failed
 

Trouble Code: P1718



Transaxle Fluid Temperature Sensor Circuit Malfunction

Possible Causes:



ATF level is low
 
TFT sensor is damaged (it may be out-of-calibration)
 
TFT sensor signal circuit shorted to power (intermittent fault)
 
PCM has failed
 

Trouble Code: P1742



Torque Converter Clutch Solenoid Circuit Malfunction

Possible Causes:



ATF is low, or the fluid is burnt, contaminated or dirty
 
TCC control valve is stuck or not working properly
 
An internal transaxle component is damaged or has failed
 
PCM has failed
 

Trouble Code: P1744



Torque Converter Clutch Mechanical Malfunction

Possible Causes:



Brake switch is damaged, out of adjustment or has failed
 
Engine or transmission temperature is too high
 
TCC control valve is stuck in the "off" position
 
An internal transaxle component is damaged or has failed
 
PCM has failed
 

Trouble Code: P1746



Electronic Pressure Control Solenoid Circuit Malfunction

Possible Causes:



EPC solenoid control circuit is open
 
EPC solenoid control circuit is shorted to system power (B+)
 
EPC solenoid is damaged or has failed
 
PCM has failed
 

Trouble Code: P1747



Electronic Pressure Control Solenoid Circuit Malfunction

Possible Causes:



EPC solenoid control circuit open between solenoid and PCM
 
EPC solenoid control circuit is shorted to ground
 
EPC solenoid is damaged or has failed
 
PCM has failed
 

Trouble Code: P1751



Transmission Shift Solenoid 'A' Mechanical Malfunction

Possible Causes:



Problems in the internal transmission components
 
SSA is damaged or has failed
 
PCM has failed
 

Trouble Code: P1756



Transmission Shift Solenoid 'B' Mechanical Malfunction

Possible Causes:



Problems in the internal transmission components
 
SSB is damaged or has failed
 
PCM has failed
 

Trouble Code: P1780



Transmission Control Switch Circuit Malfunction (Self-Test

Possible Causes:



TCS switch not cycled at the proper time in the KOER Self-Test
 
TCS switch signal circuit is open or shorted to ground
 
TCS switch signal circuit is shorted to VREF or system power
 
TCS switch is damaged, out-of-adjustment or has failed
 
PCM has failed
 

Trouble Code: P1783



Transmission Fluid Temperature Sensor Circuit High Input

Possible Causes:



ATF level is low, or the fluid is contaminated or burnt
 
Vehicle driven with excessive loads, or trailer towing conditions
 
TCC clutch is damaged or has failed (it may be slipping)
 
TFT sensor signal circuit is open (an intermittent fault)
 
Transaxle cooling system is damaged or has failed
 
PCM has failed
 

Trouble Code: P1788



A/T 3-2T/CCS Circuit Malfunction

Possible Causes:



3-2/TCCS control circuit is shorted to ground
 
3-2/TCCS power circuit is open
 
3-2/TCCS is damaged or has failed
 
PCM has failed (the solenoid driver circuit may be open)
 

Trouble Code: P1789



A/T 3-2T/CCS Circuit Malfunction

Possible Causes:



3-2/TCCS control circuit is open
 
3-2/TCCS power circuit is shorted to system power (B+)
 
3-2/TCCS is damaged or has failed
 
PCM has failed (the solenoid driver circuit may be open)
 

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
 

 
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