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Diagnostic Trouble Code Definitions

CAUTION: DO NOT crank engine before replacement PCM is programmed 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 programmed.
NOTE: Vehicle with immobilizer system can be identified by a solid urethane ignition key head.
DIAGNOSTIC TROUBLE CODE DEFINITIONS

DTC System Affected
P0010  Variable Valve Timing System, Camshaft Position Actuator Circuit
P0011  Variable Valve Timing System, Camshaft Position Timing Over-Advanced
P0012  Variable Valve Timing System, Camshaft Position Timing Over-Retarded
P0031  Front HO2S Heater Circuit Low
P0032  Front HO2S Heater Circuit High
P0037  Rear HO2S Heater Circuit Low
P0038  Rear HO2S Heater Circuit High
P0102  Mass Airflow (MAF) Sensor Circuit, Low Input
P0103  Mass Airflow (MAF) Sensor Circuit, High Input
P0106  BARO Circuit, Performance Problem
P0107  BARO Circuit, Low Input
P0108  BARO Circuit, High Input
P0111  Intake Air Temperature (IAT) Sensor Circuit, Performance Problem
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, Range/Performance Problem
P0117  Engine Coolant Temperature (ECT) Sensor Circuit, Low Input
P0118  Engine Coolant Temperature (ECT) Sensor Circuit, High Input
P0122 (3) Throttle Position (TP) Sensor Circuit, Low Input
P0123 (3) Throttle Position (TP) Sensor Circuit, High Input
P0125  Insufficient Coolant Temperature For Closed Loop Fuel Control
P0126  Insufficient Coolant Temperature For Stable Operation
P0128  Coolant Temperature Less Than Thermostat Regulating Temperature
P0130  Front HO2S Circuit Malfunction
P0134  Front HO2S Circuit, No Activity Detected
P0138  Rear HO2S Circuit, High Input
P0140  Rear HO2S Circuit, No Activity Detected
P0171  Fuel Trim Too Lean
P0172  Fuel Trim Too Rich
P0300 (2) Random Misfire Detected
P0301 (2) Cylinder No. 1 Misfire Detected
P0302 (2) Cylinder No. 2 Misfire Detected
P0303 (2) Cylinder No. 3 Misfire Detected
P0304 (2) Cylinder No. 4 Misfire Detected
P0327  Knock Sensor (KS) Circuit, Low Input
P0328  Knock Sensor (KS) Circuit, High Input
P0335  Crankshaft Position (CKP) Sensor Circuit Malfunction
DTC P0340  Camshaft Position (CMP) Sensor Circuit Malfunction
P0401  EGR System, Insufficient Flow
P0402  EGR System, Excessive Flow
P0420  Catalyst System Efficiency Below Threshold
P0442  EVAP Control System, Small Leak Detected
P0443 (1) EVAP Control System Purge Control Valve, Circuit Malfunction
P0451  Fuel Tank Pressure Sensor, Performance Problem
P0452  EVAP Control System Pressure Sensor, Low Input
P0453  EVAP Control System Pressure Sensor, High Input
P0455  EVAP Control System Malfunction, Excessive Leak Detected
P0461  Fuel Gauge Sending Unit Circuit, Range/Performance Problem
P0462  Fuel Gauge Sending Unit Circuit, Low Input
P0463  Fuel Gauge Sending Unit Circuit, High Input
P0464  Fuel Gauge Sending Unit Circuit, Slosh Check
P0480 (1) Cooling Fan Relay Circuit
P0500 (3) Vehicle Speed Sensor Malfunction
P0506  Idle Control System, RPM Less Than Expected
P0507  Idle Control System, RPM Greater Than Expected
P0550  Power Steering Pressure Switch Circuit Malfunction
P0605 (1) Internal Control Module Read Only Memory (ROM) Error
P0703  Brake Switch Input Circuit Malfunction
P0704  Clutch Switch Input Circuit Malfunction
P0705 (4) Neutral Switch Input Circuit Malfunction
P0706 (5) Automatic Transmission
P0715 (5) Automatic Transmission
P0720 (5) Automatic Transmission
P0725 (5) Automatic Transmission
P0741 (5) Automatic Transmission
P0742 (5) Automatic Transmission
P0751 (5) Automatic Transmission
P0752 (5) Automatic Transmission
P0756 (5) Automatic Transmission
P0757 (5) Automatic Transmission
P1102  Mass Airflow (MAF) Sensor Inconsistent With Throttle Position Sensor, Less Than Expected
P1103  Mass Airflow (MAF) Sensor Inconsistent With RPM, Greater Than Expected
P1122  Throttle Position Stuck Closed, Low Input
P1123  Throttle Position Stuck Open, High Input
P1170  Front HO2S, No Inversion
P1345  Camshaft Position (CMP) Sensor Circuit Malfunction
P1449 (1) Canister Drain Cut Valve (CDCV), Open Or Short
P1450  EVAP Control System Malfunction, Excessive Vacuum
P1487 (1) EGR Boost Sensor Solenoid Valve Circuit Malfunction
P1496 (1) EGR Valve Solenoid Coil No. 1, Open Or Short
P1497 (1) EGR Valve Solenoid Coil No. 2, Open Or Short
P1498 (1) EGR Valve Solenoid Coil No. 3, Open Or Short
P1499 (1) EGR Valve Solenoid Coil No. 4, Open Or Short
P1504  Idle Air Control (IAC) Valve Circuit Malfunction
P1512  Variable Tumble Control System (VTCS), Stuck Closed
P1518  Variable Tumble Control System (VTCS), Stuck Open
P1562  PCM +BB Voltage Low
P1569  Variable Tumble Control System (VTCS) Solenoid Valve Circuit, Low Input
P1570  Variable Tumble Control System (VTCS) Solenoid Valve Circuit, High Input
P1601  PCM-TCM Communication Line Error
P1602 (1) Immobilizer Unit-PCM Communication Line Error
P1603 (1) Key ID Number Unregistered In PCM
P1604 (1) Code Word Unregistered In PCM
P1608 (1) PCM Internal Circuit Malfunction
P1621 (1) Code Word Mismatch After Engine Cranking
P1622 (1) Key ID Number Mismatch
P1623 (1) Code Word Or Key ID Number Read/Write Error In PCM
P1624 (1) Immobilizer System Communication Counter = Zero
P1631 (1) Generator Output Voltage Signal, No Electricity
P1633 (1) Battery Overcharge
P1634 (1) Generator Terminal "B" Circuit Open
P1740 (5) Automatic Transmission
P1742 (5) Automatic Transmission
P1751 (5) Automatic Transmission
P1752 (5) Automatic Transmission
P1756 (5) Automatic Transmission
P1757 (5) Automatic Transmission
P1771 (5) Automatic Transmission
P1772 (5) Automatic Transmission
(1) Malfunction Indicator Light (MIL) will not illuminate.
(2) Malfunction Indicator Light (MIL) should flash.
(3) Overdrive indicator light should flash.
(4) Testing is for M/T only. On A/T models, see appropriate DIAGNOSIS article in AUTOMATIC TRANSMISSIONS.
(5) See appropriate ELECTRONIC CONTROL article in AUTOMATIC TRANSMISSIONS.