Mazda Car 2002-04

2.0L L4 - Auto 4

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Trouble Code: P0772



A/T Shift Solenoid -E- Performance (Mechanical)

Possible Causes:



ATF level is too low, or the ATF is badly deteriorated
 
A/T SSE is stuck -on-, or it is damaged (a mechanical fault)
 
A/T control valve is stuck, or it is damaged (a mechanical fault)
 
PCM has failed
 

Trouble Code: P0773



A/T Shift Solenoid -E- Circuit Malfunction

Possible Causes:



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

Trouble Code: P1001



Data Link Connector Circuit Malfunction

Possible Causes:



DLC connector or the related terminals/pins are damaged
 
DLC Bus (+) circuit is open or shorted to ground
 
DLC Bus (+) circuit is shorted at an associated module
 
DLC ground circuit is open or has a high resistance condition
 
PCM power relay is damaged or has failed (no power to DLC)
 
Incorrect Self-Test procedure followed, or idle speed to low
 
PCM has failed (e.g., the PCM VREF may be out-of-range)
 

Trouble Code: P1100



Mass Airflow Sensor Circuit Malfunction (Intermittent)

Possible Causes:



MAF sensor continuity problems at the connector or harness
 
MAF sensor circuit is open (the fault may be intermittent)
 
MAF sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P1101



Mass Airflow Sensor Malfunction (Self-Test)

Possible Causes:



MAF sensor is damaged, dirty or has failed
 
MAF sensor (inlet) screen is dirty or blocked
 
An intake air leak is present near the MAF sensor location
 
PCM has failed
 

Trouble Code: P1102



MAF Signal Inconsistent With TP Sensor (Too Low)

Possible Causes:



MAF sensor signal circuit is open or grounded (intermittent)
 
MAF sensor is damaged, dirty or has failed
 
MAF sensor (inlet) screen is dirty or blocked
 
TP sensor is damaged or erratic in operation
 
PCM has failed
 

Trouble Code: P1103



MAF Signal Inconsistent with Engine Speed (Too High)

Possible Causes:



MAF sensor signal circuit is open or grounded (intermittent)
 
MAF sensor is damaged, dirty or has failed
 
MAF sensor (inlet) screen is dirty or blocked
 
An intake air leak is present near the MAF sensor location
 
PCM has failed
 

Trouble Code: P1112



Intake Air Temperature Sensor Signal Circuit Malfunction

Possible Causes:



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

Trouble Code: P1116



Engine Coolant Temperature Sensor Circuit Malfunction (Self-Test)

Possible Causes:



ECT sensor signal circuit open or shorted to ground
 
ECT sensor signal shorted to VREF or system power
 
ECT sensor
 

Trouble Code: P1117



Engine Coolant Temperature Sensor Circuit Malfunction

Possible Causes:



ECT sensor signal is open (fault may be intermittent)
 
ECT sensor signal shorted to ground (fault may be intermittent)
 
ECT sensor signal shorted to VREF (fault may be intermittent)
 
ECT sensor ground circuit is open (fault may be intermittent)
 
ECT sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P1120



TP Sensor Signal Out of Range Low

Possible Causes:



TP sensor contacts are loose, broken or damaged
 
TP sensor pins are loose in the connector
 
TP sensor signal circuit shorted to ground (an intermittent fault)
 
TP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P11121



Throttle Position Signal Not Consistent With MAF Signal

Possible Causes:



MAF sensor is damaged or has failed
 
TP sensor is damaged or has failed
 
Air leaks between the MAF sensor and the throttle body
 
PCM has failed
 

Trouble Code: P1122



Throttle Position Signal Low Input (Stuck Closed)

Possible Causes:



TP sensor is broken damaged or has failed
 
TP sensor signal circuit is corroded or shorted in the connector
 
High resistance in the VREF circuit or intermittent loss of VREF
 
PCM has failed
 

Trouble Code: P1123



Throttle Position Signal High Input (Stuck Open)

Possible Causes:



TP sensor is broken damaged or has failed
 
MAF sensor has drifted out-of-calibration, or it is contaminated
 
TP sensor signal circuit is corroded or shorted in the connector
 
High resistance in the TP sensor ground circuit
 
PCM has failed
 

Trouble Code: P1124



Throttle Position Sensor Signal Out Of Range (Self-Test)

Possible Causes:



Throttle linkage is bent or binding
 
TP sensor is not seated properly
 
Throttle plate below closed throttle position, or throttle plate screw misadjusted
 
TP sensor is damaged
 
PCM has failed
 

Trouble Code: P1125



Throttle Position Sensor Signal Circuit Malfunction

Possible Causes:



TP sensor wiring harness is open (an intermittent fault)
 
TP sensor connector or pins are open (an intermittent fault)
 
TP sensor signal circuit is open (an intermittent fault)
 
TP sensor signal circuit is grounded (an intermittent fault)
 

Trouble Code: P1127



HO2S-12 Heater Not Enabled (Self-Test)

Possible Causes:



Engine not operated long enough prior to beginning the KOER Self-Test
 
Exhaust system temperature is too cold to run the test
 

Trouble Code: P1130



HO2S-11 (Bank 1 Sensor 1) Fuel Control Limit Reached

Possible Causes:



HO2S is damaged or has failed
 
HO2S circuits wet or oily, corroded, or poor terminal contact
 
HO2S signal circuit open, shorted to ground, short to power
 
Low fuel pressure or vehicle driven until it was out of fuel
 
Fuel pressure regulator leaking, or fuel injectors leaking
 
EVAP vapor recovery system has failed
 
Air leaks located after the MAF sensor
 
Exhaust leaks before or near the front HO2S
 
EGR valve stuck, EGR diaphragm leaking, or gasket leaking
 
Oil dipstick not seated or engine oil level too high (overfilled)
 

Trouble Code: P11131



HO2S-11 (Bank 1 Sensor 1) Indicates A/F Ratio Too Lean

Possible Causes:



Air leaks located after the MAF sensor
 
Base Engine: Check for vacuum leaks with a Smoke Tester
 
Intake air system is leaking, obstructed and damaged
 
Low fuel pressure or vehicle driven until it was out of fuel
 
PCV system has air leaks at the valve or related hoses
 

Trouble Code: P1132



HO2S-11 (Bank 1 Sensor 1) Indicates A/F Ratio Too Rich

Possible Causes:



Check air cleaner element, air cleaner housing for blockage
 
Fuel pressure regulator is leaking, or fuel pressure is too high
 
Fuel injectors leaking or contaminated (they may be sticking)
 
EVAP vapor recovery system has failed (canister full of fuel)
 

Trouble Code: P1137



HO2S-12 Lack of Switching, Indicates Lean (Self-Test)

Possible Causes:



Air leaks located after the MAF sensor
 
Base Engine: Check for vacuum leaks with a Smoke Tester
 
HO2S wiring may be crossed at the connector
 
Check intake air system for leaks, obstructions and damage
 
EGR system malfunction (the EGR valve may be stuck open)
 
PCV system has air leaks at the valve or related hoses
 
Fuel pressure is too low (fuel filter is dirty, or weak fuel pump)
 
Vehicle driven until it was out of fuel
 

Trouble Code: P1138



HO2S-12 Lack of Switching, Indicates Rich (Self-Test)

Possible Causes:



Check air cleaner element, air cleaner housing for blockage
 
Fuel pressure regulator is leaking, or fuel pressure is too high
 
HO2S wiring may be crossed at the connector
 
Fuel injectors leaking or contaminated (they may be sticking)
 
EVAP vapor recovery system has failed (canister full of fuel)
 

Trouble Code: P1143



HO2S-22 Input Indicates A/F Ratio Too Lean (Self-Test)

Possible Causes:



Air leaks located after the MAF sensor
 
Base Engine: Check for vacuum leaks with a Smoke Tester
 
HO2S wiring may be crossed at the connector
 
Check intake air system for leaks, obstructions and damage
 
PCV system has air leaks at the valve or related hoses
 
Fuel pressure is too low (fuel filter is dirty, or weak fuel pump)
 
Vehicle driven until it was out of fuel
 

Trouble Code: P1144



HO2S-22 (Bank 2 Sensor 2) Indicates A/F Ratio Too Rich (Self-Test)

Possible Causes:



Check air cleaner element, air cleaner housing for blockage
 
HO2S wiring may be crossed at the connector
 
Fuel pressure regulator is leaking, or fuel pressure is too high
 
Fuel injectors leaking or contaminated (they may be sticking)
 
EVAP vapor recovery system has failed (canister full of fuel)
 

Trouble Code: P1150



HO2S-21 (Bank 2 Sensor 1) Fuel Control Limit Reached

Possible Causes:



HO2S is damaged or has failed
 
HO2S circuits wet or oily, corroded, or poor terminal contact
 
HO2S signal circuit open, shorted to ground, short to power
 
Low fuel pressure or vehicle driven until it was out of fuel
 
Excessive fuel pressure, leaking or contaminated fuel injectors
 
Leaking fuel pressure regulator
 
EVAP vapor recovery system has failed
 
Air leaks located after the MAF sensor
 
Exhaust leaks before or near the front HO2S
 
EGR valve stuck, EGR diaphragm leaking, or gasket leaking
 
Oil dipstick not seated or engine oil level too high (overfilled)
 

Trouble Code: P1151



HO2S-21 (Bank 1 Sensor 1) Indicates A/F Ratio Too Lean

Possible Causes:



Air leaks located after the MAF sensor
 
Base Engine: Check for vacuum leaks with a Smoke Tester
 
Intake air system is leaking, obstructed and damaged
 
Low fuel pressure or vehicle driven until it was out of fuel
 
PCV system has air leaks at the valve or related hoses
 

Trouble Code: P1152



HO2S-21 (Bank 2 Sensor 1) Indicates A/F Ratio Too Rich

Possible Causes:



Check air cleaner element, air cleaner housing for blockage
 
Fuel pressure regulator is leaking, or fuel pressure is too high
 
Fuel injectors leaking or contaminated (they may be sticking)
 
EVAP vapor recovery system has failed (canister full of fuel)
 

Trouble Code: P1157



HO2S-22 Lack of Switching, Indicates Lean (Self-Test)

Possible Causes:



An air leak that is located after the MAF sensor
 
Base Engine: Check for vacuum leaks with a Smoke Tester
 
HO2S wiring may be crossed at the connector
 
Check intake air system for leaks, obstructions and damage
 
EGR system malfunction (the EGR valve may be stuck open)
 
PCV system has air leaks at the valve or related hoses
 
Fuel pressure is too low (fuel filter is dirty, or weak fuel pump)
 
Vehicle driven until it was out of fuel
 

Trouble Code: P1158



HO2S-22 Lack of Switching, Indicates Rich (Self-Test)

Possible Causes:



Check air cleaner element, air cleaner housing for blockage
 
Fuel pressure regulator is leaking, or fuel pressure is too high
 
HO2S wiring may be crossed at the connector
 
Fuel injectors leaking or contaminated (they may be sticking)
 
EVAP vapor recovery system has failed (canister full of fuel)
 

Trouble Code: P1170



HO2S-11 (Bank 1 Sensor 1) Circuit No Inversion

Possible Causes:



An air leak that is located after the MAF sensor
 
Base engine mechanical fault affecting one or more cylinders
 
EVAP Purge valve stuck or the hoses to the valve are reversed
 
Fuel metering fault (fuel injector sticking open or leaking)
 
Fuel pressure too low or too high, fuel supply contaminated
 
HO2S element is contaminated or the HO2S heater has failed
 
PCV system has air leaks at the valve or related hoses
 

Trouble Code: P1250



Pressure Regulator Control Solenoid Circuit Malfunction (Self-Test)

Possible Causes:



PRC control solenoid circuit is open or shorted to ground
 
Fuel pump relay power circuit is open
 
PCM has failed
 

Trouble Code: P1345



Camshaft Position (SGC) Sensor Circuit Malfunction

Possible Causes:



CMP sensor signal circuit is open or shorted to ground
 
CMP sensor signal circuit is shorted to VREF or system power
 
CMP sensor power circuit open between sensor and main relay
 
CMP sensor 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: P1410



EGR Boost Sensor Solenoid Valve Stuck

Possible Causes:



Air leaks located after the MAF sensor assembly
 
EGR/BARO sensor is damaged or has failed
 
EGRC solenoid valve is damaged or has failed
 
EGR sensor vacuum hose to EGR Boost solenoid is loose
 
EGR sensor vacuum hose to the intake manifold is loose
 
EGRC or EGR/BARO sensor harness/connector damaged
 
PCM has failed
 

Trouble Code: P1449



CDCV or TPCV Circuit Malfunction

Possible Causes:



CDCV control circuit is open or shorted to ground
 
CDCV control circuit is shorted to power
 
CDCV power circuit is open between the valve and main relay
 
CDCV is damaged or has failed
 
TPCV solenoid control circuit is open or shorted to ground
 
TPCV (valve) is damaged, leaking or has failed
 
PCM has failed
 

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 Drain Vent Solenoid Circuit Malfunction

Possible Causes:



CDCV solenoid control circuit is open or shorted to ground
 
CDCV solenoid control circuit is shorted to system power (B+)
 
CDCV 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 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: P1474



Fan Control Relay Control Circuit Malfunction

Possible Causes:



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

 
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