Diagnostic Trouble Code Definitions

WARNING: This page is about a different car, the 2004 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

DIAGNOSTIC TROUBLE CODE DEFINITIONS

DTC	Description
DTC P0011	CMP TIMING OVER-ADVANCED
DTC P0012	CMP TIMING OVER RETARDED
DTC P0031	FRONT HO2S HEATER CIRCUIT LOW INPUT
DTC P0032	FRONT HO2S HEATER CIRCUIT HIGH INPUT
DTC P0037	REAR HO2S HEATER CIRCUIT LOW INPUT
DTC P0038	REAR HO2S HEATER CIRCUIT HIGH INPUT
DTC P0101	MAF SENSOR INCONSISTENT WITH TP SENSOR OR ENGINE SPEED
DTC P0102	MAF CIRCUIT LOW INPUT
DTC P0103	MAF CIRCUIT HIGH INPUT
DTC P0106	MAP SENSOR PERFORMANCE PROBLEM
DTC P0107	MAP SENSOR CIRCUIT LOW INPUT
DTC P0108	MAP SENSOR CIRCUIT HIGH INPUT
DTC P0111	IAT CIRCUIT PERFORMANCE PROBLEM
DTC P0112	IAT CIRCUIT LOW INPUT
DTC P0113	IAT CIRCUIT HIGH INPUT
DTC P0117	ECT CIRCUIT LOW INPUT
DTC P0118	ECT CIRCUIT HIGH INPUT
DTC P0122	TP SENSOR NO. 1 CIRCUIT LOW INPUT
DTC P0123	TP SENSOR NO. 1 CIRCUIT HIGH INPUT
DTC P0125	EXCESSIVE TIME TO ENTER CLOSED LOOP FUEL CONTROL
DTC P0126	COOLANT THERMOSTAT STUCK OPEN
DTC P0128	COOLANT THERMOSTAT STUCK OPEN
DTC P0132	FRONT HO2S CIRCUIT HIGH INPUT
DTC P0133	FRONT HO2S CIRCUIT SLOW RESPONSE
DTC P0134	FRONT HO2S CIRCUIT NO ACTIVITY DETECTED
DTC P0138	REAR HO2S CIRCUIT HIGH INPUT
DTC P0139	REAR HO2S CIRCUIT MALFUNCTION
DTC P0140	REAR HO2S CIRCUIT NO ACTIVITY DETECTED
DTC P0222	TP SENSOR NO. 2 CIRCUIT LOW INPUT
DTC P0223	TP SENSOR NO. 2 CIRCUIT HIGH INPUT
DTC P0300	RANDOM MISFIRE DETECTED
DTC P0301	MISFIRE DETECTED
DTC P0302	MISFIRE DETECTED
DTC P0303	MISFIRE DETECTED
DTC P0304	MISFIRE DETECTED
DTC P0327	KNOCK SENSOR CIRCUIT LOW INPUT
DTC P0328	KNOCK SENSOR CIRCUIT HIGH INPUT
DTC P0335	CKP SENSOR CIRCUIT MALFUNCTION
DTC P0340	CMP SENSOR CIRCUIT MALFUNCTION
DTC P0401	EGR FLOW INSUFFICIENT DETECTED
DTC P0403	EGR VALVE (STEPPER MOTOR) CIRCUIT MALFUNCTION
DTC P0420	CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD
DTC P0441	EVAPORATIVE EMISSION CONTROL SYSTEM INCORRECT PURGE FLOW
DTC P0442	EVAPORATIVE EMISSION CONTROL SYSTEM LEAK DETECTED (SMALL LEAK)
DTC P0443	EVAPORATIVE EMISSION CONTROL SYSTEM PURGE CONTROL VALVE CIRCUIT MALFUNCTION
DTC P0446	CHANGE OVER VALVE (COV) (EVAP SYSTEM LEAK DETECTION PUMP) STUCK CLOSED
DTC P0455	EVAPORATIVE EMISSION CONTROL SYSTEM LEAK DETECTED (GROSS LEAK)
DTC P0456	EVAPORATIVE EMISSION CONTROL SYSTEM LEAK DETECTED (VERY SMALL LEAK)
DTC P0461	FUEL GAUGE SENDER UNIT CIRCUIT RANGE/PERFORMANCE
DTC P0462	FUEL GAUGE SENDER UNIT CIRCUIT LOW INPUT
DTC P0463	FUEL GAUGE SENDER UNIT CIRCUIT HIGH INPUT
DTC P0480	FAN RELAY NO. 1 CONTROL CIRCUIT MALFUNCTION
DTC P0481	FAN RELAY NO. 2 & NO. 3 CONTROL CIRCUIT MALFUNCTION
DTC P0482	FAN RELAY NO. 4 CONTROL CIRCUIT MALFUNCTION
DTC P0500	VEHICLE SPEED SENSOR (VSS) CIRCUIT MALFUNCTION
DTC P0505	IDLE CONTROL SYSTEM MALFUNCTION
DTC P0506	IDLE CONTROL SYSTEM RPM LOWER THAN EXPECTED
DTC P0507	IDLE CONTROL SYSTEM RPM HIGHER THAN EXPECTED
DTC P0550	PSP SWITCH CIRCUIT MALFUNCTION
DTC P0564	CRUISE CONTROL SWITCH CIRCUIT MALFUNCTION
DTC P0571	BRAKE SWITCH CIRCUIT MALFUNCTION
DTC P0601	INTERNAL CONTROL MODULE MEMORY CHECK SUM ERROR
DTC P0602	PCM PROGRAMMING ERROR
DTC P0604	PCM RAM ERROR
DTC P0606	ECM/PCM PROCESSOR
DTC P0607	CONTROL MODULE PERFORMANCE
DTC P0610	CONTROL MODULE VEHICLE OPTIONS ERROR
DTC P0638	THROTTLE ACTUATOR CONTROL RANGE/PERFORMANCE
DTC P0661	VARIABLE INTAKE-AIR SYSTEM (VIS) CONTROL SOLENOID VALVE CIRCUIT LOW INPUT
DTC P0662	VARIABLE INTAKE-AIR SYSTEM (VIS) CONTROL SOLENOID VALVE CIRCUIT HIGH INPUT
DTC P0703	BRAKE SWITCH NO. 1 CIRCUIT MALFUNCTION
DTC P0704	CLUTCH SWITCH CIRCUIT MALFUNCTION (MT)
DTC P0850	NEUTRAL SWITCH CIRCUIT MALFUNCTION (MT)
DTC P2004	VARIABLE TUMBLE CONTROL SYSTEM (VTCS) SHUTTER VALVE STUCK OPEN
DTC P2006	VARIABLE TUMBLE CONTROL SYSTEM (VTCS) SHUTTER VALVE STUCK CLOSED
DTC P2009	VARIABLE TUMBLE CONTROL SOLENOID VALVE CIRCUIT LOW INPUT
DTC P2010	VARIABLE TUMBLE CONTROL SOLENOID VALVE CIRCUIT HIGH INPUT
DTC P2088	OCV ACTUATOR CIRCUIT LOW
DTC P2089	OCV ACTUATOR CIRCUIT HIGH
DTC P2096	TARGET A/F FEEDBACK SYSTEM TOO LEAN
DTC P2097	TARGET A/F FEEDBACK SYSTEM TOO RICH
DTC P2100	THROTTLE ACTUATOR CIRCUIT OPEN
DTC P2101	THROTTLE ACTUATOR CIRCUIT RANGE/PERFORMANCE
DTC P2102	THROTTLE ACTUATOR CIRCUIT LOW INPUT
DTC P2103	THROTTLE ACTUATOR CONTROL MOTOR CIRCUIT HIGH INPUT
DTC P2107	THROTTLE ACTUATOR CONTROL MODULE PROCESSOR
DTC P2108	THROTTLE ACTUATOR CONTROL MODULE PERFORMANCE
DTC P2119	THROTTLE ACTUATOR CONTROL THROTTLE BODY RANGE/PERFORMANCE
DTC P2122	ACCELERATOR PEDAL POSITION (APP) SENSOR NO. 1 CIRCUIT LOW INPUT
DTC P2123	ACCELERATOR PEDAL POSITION (APP) SENSOR NO. 1 CIRCUIT HIGH INPUT
DTC P2127	ACCELERATOR PEDAL POSITION (APP) SENSOR NO. 2 CIRCUIT LOW INPUT
DTC P2128	ACCELERATOR PEDAL POSITION (APP) SENSOR NO. 2 CIRCUIT HIGH INPUT
DTC P2135	THROTTLE POSITION SENSOR NO. 1/NO. 2 VOLTAGE CORRELATION
DTC P2138	ACCELERATOR PEDAL POSITION (APP) SENSOR NO. 1/NO. 2 VOLTAGE CORRELATION
DTC P2177	FUEL SYSTEM TOO LEAN AT OFF IDLE
DTC P2178	FUEL SYSTEM TOO RICH AT OFF IDLE
DTC P2187	FUEL SYSTEM TOO LEAN AT IDLE
DTC P2188	FUEL SYSTEM TOO RICH AT IDLE
DTC P2195	FRONT HO2S SIGNAL STUCK LEAN
DTC P2196	FRONT HO2S SIGNAL STUCK RICH
DTC P2228	BARO SENSOR CIRCUIT LOW INPUT
DTC P2229	BARO SENSOR CIRCUIT HIGH INPUT
DTC P2401	EVAPORATIVE EMISSION SYSTEM LEAK DETECTION PUMP CONTROL CIRCUIT LOW
DTC P2402	EVAPORATIVE EMISSION SYSTEM LEAK DETECTION PUMP CONTROL CIRCUIT HIGH
DTC P2404	: EVAPORATIVE EMISSION SYSTEM LEAK DETECTION PUMP SENSE CIRCUIT MALFUNCTION
DTC P2405	EVAPORATIVE EMISSION SYSTEM LEAK DETECTION PUMP SENSE CIRCUIT LOW INPUT
DTC P2407	EVAPORATIVE EMISSION SYSTEM LEAK DETECTION PUMP SENSE CIRCUIT INTERMITTENT
DTC P2502	GENERATOR TERMINAL B CIRCUIT OPEN
DTC P2503	GENERATOR OUTPUT VOLTAGE SIGNAL NO ELECTRICITY
DTC P2504	BATTERY OVERCHARGE
DTC P2507	PCM + BB (BATTERY BACKUP) VOLTAGE LOW
DTC P2676	VARIABLE AIR DUCT (VAD) CONTROL SOLENOID VALVE CIRCUIT LOW INPUT
DTC P2677	VARIABLE AIR DUCT (VAD) CONTROL SOLENOID VALVE CIRCUIT HIGH INPUT