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Home >> Mazda >> 2002 >> 626 LX, 2.0 C, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - 2.0L >> Diagnostic Trouble Code Definitions
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Diagnostic Trouble Code Definitions

CAUTION: DO NOT crank engine before replacement PCM is programed to immobilizer system, or PCM will be severely damaged. If test procedures require replacement of PCM on a vehicle equipped with immobilizer system, vehicle must be sent to authorized Mazda dealer to have replacement PCM programed.
NOTE: Vehicle with immobilizer system can be identified by a solid urethane ignition key head.
DIAGNOSTIC TROUBLE CODE DEFINITIONS

DTC System Affected
P0068  Throttle Position (TP) Sensor Inconsistent With Mass Airflow (MAF) Sensor
P0102  Mass Airflow (MAF) Sensor Circuit, Low Input
P0103  Mass Airflow (MAF) Sensor Circuit, High Input
P0106  BARO Sensor Circuit, Performance Problem
P0107  BARO Sensor Circuit, Low Input
P0108  BARO Sensor Circuit, High Input
P0112  Intake Air Temperature (IAT) Sensor Circuit, Low Input
P0113  Intake Air Temperature (IAT) Sensor Circuit, High Input
P0116  Engine Coolant Temperature (ECT) Sensor Circuit, Performance Problem
P0117  Engine Coolant Temperature (ECT) Sensor Circuit, Low Input
P0118  Engine Coolant Temperature (ECT) Sensor Circuit, High Input
P0122  Throttle Position (TP) Sensor, Low Input
P0123  Throttle Position (TP) Sensor, High Input
P0125  Excessive Time To Enter Close Loop
P0126  Coolant Thermostat Stuck Open
P0128  Coolant Thermostat Stuck Open
P0133  Front Heated Oxygen Sensor Circuit, Slow Response
P0135  Front Heated Oxygen Sensor Heater Circuit Malfunction
P0136  Rear Heated Oxygen Sensor Circuit Malfunction
P0141  Rear Heated Oxygen Sensor Heater Circuit Malfunction
P0171  Fuel Trim System, Too Lean
P0172  Fuel Trim System, Too Rich
P0230  Fuel Pump Primary Circuit Malfunction
P0300 (1) Misfire Detection Monitor (Random)
P0301 (1) Cylinder No. 1 Misfire Detected
P0302 (1) Cylinder No. 2 Misfire Detected
P0303 (1) Cylinder No. 3 Misfire Detected
P0304 (1) Cylinder No. 4 Misfire Detected
P0316  Misfire During First 1000 Revs After Start-Up
P0320  Crankshaft Position (CKP) Sensor Circuit Malfunction
P0325  Knock Sensor (KS) Circuit Malfunction
P0340  Camshaft Position (CMP) Sensor Circuit Malfunction
P0400  EGR Flow Malfunction
P0403  EGR Valve Control Circuit Malfunction
P0421  Catalyst Warm-Up Efficiency Low
P0442  Evaporative Emission System, Small Leak
P0443  Evaporative Emission System Purge Control Valve Circuit Malfunction
P0446  Evaporative Emission System Vent Control Malfunction
P0452  Evaporative Emission System Fuel Tank Pressure Sensor, Low Input
P0453  Evaporative Emission System Fuel Tank Pressure Sensor, High Input
P0455  Evaporative Emission System, Large Leak
P0460  Fuel Gauge Sender Unit Circuit Malfunction
P0461  Fuel Gauge Sender Unit Circuit Performance Problem
P0480 (5) Cooling Fan Control Circuit Malfunction
P0481 (5) Condenser Fan Control Circuit Malfunction
P0500  Vehicle Speed Sensor (VSS) Circuit Malfunction
P0503 (2) Vehicle Speed Sensor (VSS), Erratic Malfunction
P0505  Idle Air Control (IAC) Valve, System Malfunction
P0506  Idle Control System PRM Lower Than Expected
P0507  Idle Control System RPM Greater Than Expected
P0511  IAC Valve Circuit Malfunction
P0603  Powertrain Control Module (PCM), Keep Alive Memory (KAM) Test Error
P0605  Powertrain Control Module Malfunction (PCM), Read Only Memory (ROM), Test Error
P0704 (3) Clutch Switch Circuit Malfunction
P0707 (4) Automatic Transmission
P0708 (4) Automatic Transmission
P0712 (4) Automatic Transmission
P0713 (4) Automatic Transmission
P0715 (4) Automatic Transmission
P0731 (4) Automatic Transmission
P0732 (4) Automatic Transmission
P0733 (4) Automatic Transmission
P0734 (4) Automatic Transmission
P0743 (4) Automatic Transmission
P0750 (4) Automatic Transmission
P0751 (4) Automatic Transmission
P0755 (4) Automatic Transmission
P0756 (4) Automatic Transmission
P0850  Neutral Switch Input Circuit Malfunction
P1001  Data Link Connector (DLC) Malfunction
P1100  Mass Airflow (MAF) Sensor, Intermittent Malfunction
P1101  Mass Airflow (MAF) Sensor, Out Of Range
P1112  Intake Air Temperature (IAT) Sensor, Intermittent Malfunction
P1116  Engine Coolant Temperature (ECT) Sensor, Out Of Range
P1117  Engine Coolant Temperature (ECT) Sensor, Intermittent Malfunction
P1120  Throttle Position (TP) Sensor, Out Of Range (Low)
P1124  Mass Airflow (MAF) Sensor Inconsistent With RPM, Greater Than Expected
P1125  Throttle Position (TP) Sensor, Intermittent Problem
P1127  Cold Exhaust
P1130  Front Heated Oxygen Sensor Not Switching (Adapted Fuel Limit)
P1131  Front Heated Oxygen Sensor Not Switching (Sensor Indicates Lean)
P1132  Front Heated Oxygen Sensor Not Switching (Sensor Indicates Rich)
P1137  Rear Heated Oxygen Sensor Not Switching (Sensor Indicates Lean)
P1138  Rear Heated Oxygen Sensor Not Switching (Sensor Indicates Rich)
P1250 (5) Fuel Pressure Regulator Control (PRC) Solenoid Valve Circuit Malfunction
P1410  EGR Boost Sensor Solenoid Valve Stuck
P1450  Evaporative Control System Malfunction (Vacuum Leak)
P1451  Canister Drain Cut Valve (CDCV) Circuit Malfunction
P1460 (5) WOT A/C Control Circuit Malfunction
P1464 (5) A/C Demand Out Of Range
P1487 (5) EGR Boost Sensor Solenoid Valve Circuit Malfunction
P1501 (5) Vehicle Speed Sensor (VSS), Out Of Range
P1504  Idle Air Control (IAC) Valve Circuit Malfunction
P1506  Idle Control System, RPM Less Than Expected
P1507  Idle Control System, RPM Greater Than Expected
P1512  Variable Tumble Control System (VTCS) Shutter Valve Stuck
P1569  Variable Tumble Control System (VTCS) Solenoid Valve Circuit Malfunction
P1602 (5) Immobilizer Unit, PCM Communication Error
P1603 (5) Code Word Not Registered In PCM
P1604 (5) Key ID Number Not Registered In PCM
P1621 (5) Code Word Does Not Match After Engine Cranking
P1622 (5) Key ID Number Does Not Match
P1623 (5) Code Word Or Key ID Number, Read/Write Error In PCM
P1624 (5) Immobilizer System Communication Counter = Zero
P1633  Powertrain Control Module (PCM) Keep Alive Memory (KAM) Circuit, Low Voltage
P1650 (5) Power Steering Pressure (PSP) Switch, Out Of Range
P1652  Power Steering Pressure (PSP) Switch, Failed On
P1703 (5) Brake Switch, Out Of Range
P1705 (4) Automatic Transmission
P1711 (4) Automatic Transmission
P1713 (4) Automatic Transmission
P1718 (4) Automatic Transmission
P1742 (4) Automatic Transmission
P1743 (4) Automatic Transmission
P1744 (4) Automatic Transmission
P1746 (4) Automatic Transmission
P1747 (4) Automatic Transmission
P1780 (4) Automatic Transmission
P1783 (4) Automatic Transmission
P1788 (4) Automatic Transmission
P1789 (4) Automatic Transmission
(1) Malfunction Indicator Light (MIL) should flash.
(2) Overdrive indicator light should flash.
(3) Manual transmission only.
(4) See appropriate DIAGNOSIS article in AUTOMATIC TRANSMISSIONS.
(5) Malfunction Indicator Light (MIL) will not illuminate.