Mazda U0416 Invalid data received from DSC CM DETECTION CONDITION • PCM received implausible torque request from DSC CM. POSSIBLE CAUSE • DSC CM does not determine vehicle condition correctly. ― DSC CM malfunction ― DSC related sensor malfunction • Communication error between PCM and DSC CM Diagnostic procedure STEP INSPECTION ACTION 1 VERIFY FREEZE FRAME DATA HAS BEEN RECORDED…
Mazda Factory OBD-II DTC P242F Code Diagnostic Procedure
Mazda P242F Diesel particulate filter restriction-ash accumulation DETECTION CONDITION • The PCM monitors the exhaust pressure before and after the diesel particulate filter, using the diesel particular filter differential pressure sensor. If the pressure difference is above calibrated value, the PCM determines that the diesel particulate filter is restricted by ash. POSSIBLE CAUSE • Particular filter differential…
Mazda Factory OBD-II DTC P2453 Code Diagnostic Procedure
Mazda P2453 Diesel particulate filter differential pressure sensor range/performance problem DETECTION CONDITION • The PCM monitors the input voltage from the diesel particulate filter differential pressure sensor signal. If the voltages at PCM terminal 207, 246 and 119 deviates from the threshold, the PCM determines that the there is a diesel particulate filter differential pressure sensor…
Mazda Factory OBD-II DTC P2454 Code Diagnostic Procedure
Mazda P2454 Diesel particulate filter differential pressure sensor circuit low input DETECTION CONDITION • The PCM monitors the diesel particulate filter differential pressure sensor signal. If the voltage at PCM terminal 207, 246 and 119 remains low, the PCM determines that there is a diesel particulate filter differential pressure sensor circuit malfunction. POSSIBLE CAUSE • Diesel particulate…
Mazda Factory OBD-II DTC P2455 Code Diagnostic Procedure
Mazda P2455 Diesel particulate filter differential pressure sensor circuit high input DETECTION CONDITION • The PCM monitors the diesel particulate filter differential pressure sensor signal. If the voltage at PCM terminal 207, 246 and 119 remains high, the PCM determines that there is a diesel particulate filter differential pressure sensor circuit malfunction. POSSIBLE CAUSE • Diesel particulate…
Mazda Factory OBD-II DTC P2458 Code Diagnostic Procedure
Mazda P2458 Diesel particulate filter regeneration duration DETECTION CONDITION • The PCM monitors the diesel particulate filter regeneration duration using the exhaust differential pressure sensor. If the exhaust differential pressure sensor signal high condition is longer than specified period. The PCM determines that the diesel particulate filter regeneration duration is too long. POSSIBLE CAUSE • EGR valve…
Mazda Factory OBD-II DTC P2002 Code Diagnostic Procedure
Mazda P2002 Diesel particulate trap efficiency below threshold DETECTION CONDITION • The PCM monitors the exhaust pressure before and after the diesel particulate filter, using the diesel particulate filter differential pressure sensor. If the pressure difference is below calibrated value, the PCM determines that the diesel particulate filter trap efficiency is below threshold. POSSIBLE CAUSE • Particulate…
Mazda Factory OBD-II DTC P2141 Code Diagnostic Procedure
Mazda P2141 Intake throttle valve actuator circuit low DETECTION CONDITION • The PCM monitors that the intake throttle valve actuator control circuit voltage at the PCM terminal 247. If the PCM terminal 247 voltage is below threshold when the intake throttle operation condition. The PCM determines that intake throttle valve actuator circuit is low. POSSIBLE CAUSE…
Mazda Factory OBD-II DTC P2142 Code Diagnostic Procedure
Mazda P2142 Intake throttle valve actuator circuit high DETECTION CONDITION • The PCM monitors that the intake throttle valve actuator control circuit voltage at the PCM terminal 247. If the PCM terminal 247 voltage is above threshold when the intake throttle valve actuator operation condition. The PCM determines that intake throttle circuit is high. POSSIBLE CAUSE…
Mazda Factory OBD-II DTC P2227 Code Diagnostic Procedure
Mazda P2227 BARO sensor range/performance problem DETECTION CONDITION • PCM internal malfunction POSSIBLE CAUSE • BARO sensor (integrated in PCM) malfunction • PCM malfunction Diagnostic procedure STEP INSPECTION ACTION 1 VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has the FREEZE FRAME DATA been recorded? Yes Go to the next step. No Record the FREEZE FRAME DATA on the…
Mazda Factory OBD-II DTC P2228 Code Diagnostic Procedure
Mazda P2228 BARO sensor circuit low input DETECTION CONDITION • PCM internal malfunction POSSIBLE CAUSE • BARO sensor (integrated in PCM) malfunction • PCM malfunction Diagnostic procedure STEP INSPECTION ACTION 1 VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has the FREEZE FRAME DATA been recorded? Yes Go to the next step. No Record the FREEZE FRAME DATA on…
Mazda Factory OBD-II DTC P2229 Code Diagnostic Procedure
Mazda P2229 BARO sensor circuit high input DETECTION CONDITION • PCM internal malfunction POSSIBLE CAUSE • BARO sensor (integrated in PCM) malfunction • PCM malfunction Diagnostic procedure STEP INSPECTION ACTION 1 VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has the FREEZE FRAME DATA been recorded? Yes Go to the next step. No Record the FREEZE FRAME DATA on…
Mazda Factory OBD-II DTC P1639 Code Diagnostic Procedure
Mazda P1639 Vehicle identification block corrupted or not programmed DETECTION CONDITION • Vehicle identification block not programmed – program vehicle identification block • Vehicle identification checksum error – re-program vehicle identification POSSIBLE CAUSE • No configuration data in the PCM. • PCM internal EEPROM is damaged. Diagnostic procedure STEP INSPECTION ACTION 1 VERIFY RELATED REPAIR INFORMATION AVAILABILITY • Verify related…
Mazda Factory OBD-II DTC P1675 Code Diagnostic Procedure
Mazda P1675 Injector correction data not programmed DETECTION CONDITION • Injector correction data not programmed POSSIBLE CAUSE • Injector correction data not programmed • PCM malfunction Diagnostic procedure STEP INSPECTION ACTION 1 VERIFY RELATED REPAIR INFORMATION AVAILABILITY • Verify related service bulletins and/or on-line repair information availability. • Is any repair information available? Yes Perform repair or diagnosis according to…
Mazda Factory OBD-II DTC P1676 Code Diagnostic Procedure
Mazda P1676 Injector correction data incorrect DETECTION CONDITION • Injector correction data checksum error POSSIBLE CAUSE • Injector correction data incorrect • PCM malfunction Diagnostic procedure STEP INSPECTION ACTION 1 VERIFY RELATED REPAIR INFORMATION AVAILABILITY • Verify related service bulletins and/or on-line repair information availability. • Is any repair information available? Yes Perform repair or diagnosis according to the available…
Mazda Factory OBD-II DTC P1719 Code Diagnostic Procedure
Mazda P1719 Engine torque signal DETECTION CONDITION • Inaccurate torque. POSSIBLE CAUSE • PCM malfunction Diagnostic procedure STEP INSPECTION ACTION 1 VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has the FREEZE FRAME DATA been recorded? Yes Go to the next step. No Record the FREEZE FRAME DATA on the repair order, then go to the next step….
Mazda Factory OBD-II DTC P0500, P1934 Code Diagnostic Procedure
DTC P0500 Mazda P1934 Vehicle speed signal problem DETECTION CONDITION • The PCM monitors the vehicle speed signal from the ABS HU/CU by CAN. If the signal at PCM deviates from the threshold, the PCM determines that the there is an ABS system problem. POSSIBLE CAUSE • ABS HU/CU system malfunction • PCM malfunction Diagnostic procedure STEP INSPECTION…
Mazda Factory OBD-II DTC P1935 Code Diagnostic Procedure
Mazda P1935 BOO switch input circuit malfunction DETECTION CONDITION • The PCM monitors the BOO switch signal from the instrument cluster. If the voltage at the instrument cluster terminal 2M remains low, the PCM determines that there is an BOO switch circuit malfunction. POSSIBLE CAUSE • BOO switch malfunction • Poor connection of BOO switch connector or instrument…
Mazda Factory OBD-II DTC P0120, P0121, P0220, P0221, P193B Code Diagnostic Procedure
Mazda P0120 Mazda P0121 Mazda P0220 Mazda P0221 Mazda P193B Accelerator pedal position (APP) sensor circuit malfunction DETECTION CONDITION • CAN signal error POSSIBLE CAUSE • APP sensor malfunction • Connector or terminal malfunction • CAN system malfunction • Instrument cluster malfunction • PCM malfunction Diagnostic procedure STEP INSPECTION ACTION 1 VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has the FREEZE…
Mazda Factory OBD-II DTC P0704, P1936 Code Diagnostic Procedure
Mazda P0704 Mazda P1936 Clutch pedal position (CPP) switch input circuit malfunction DETECTION CONDITION • The PCM monitors the CPP switch signal from the instrument cluster. If the voltage at instrument cluster terminal 2K remains low or high, the PCM determines that there is a CPP switch circuit problem. POSSIBLE CAUSE • CPP switch malfunction • Poor connection…