Note. For connector terminal ID, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS - 2.5L article. Always perform applicable drive cycle test after repair is performed to verify if DTC is reset.
Home/Mazda/Millenia/Mazda Millenia I (1994-2000)/Repair manual/Testing & Diagnostics/DTC P1609 - POWERTRAIN CONTROL MODULE (CPU) MALFUNCTION
Contents
Wiring diagrams Section: Testing & Diagnostics- Engine Controls - Tests W/codes - 2.3L: Overview
- Engine Controls - Tests W/codes - 2.3L: Diagnosis
- Engine Controls - Tests W/codes - 2.3L: Component Locations
- Engine Controls - Tests W/codes - 2.3L: Other
- DTC P0100 - MASS AIRFLOW (MAF) SENSOR CIRCUIT MALFUNCTION
- DTC P0105 - MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR CIRCUIT MALFUNCTION
- DTC P0110 - INTAKE AIR TEMPERATURE (IAT) SENSOR CIRCUIT MALFUNCTION
- DTC P0115 - ENGINE COOLANT TEMPERATURE (ECT) SENSOR CIRCUIT MALFUNCTION
- DTC P0120 - THROTTLE POSITION (TP) SENSOR CIRCUIT MALFUNCTION
- DTC P0125 - EXCESSIVE TIME TO ENTER CLOSED LOOP
- DTC P0130 - RIGHT FRONT HEATED OXYGEN SENSOR MALFUNCTION
- DTC P0134 - RIGHT FRONT HEATED OXYGEN SENSOR -INSUFFICIENT ACTIVITY DETECTED
- DTC P0135 - RIGHT FRONT OXYGEN SENSOR HEATER MALFUNCTION
- DTC P0140 - RIGHT REAR HEATED OXYGEN SENSOR, INSUFFICIENT ACTIVITY DETECTED
- DTC P0141 - RIGHT REAR OXYGEN SENSOR HEATER MALFUNCTION
- DTC P0150 - LEFT FRONT HEATED OXYGEN SENSOR MALFUNCTION
- DTC P0154 - LEFT FRONT OXYGEN SENSOR, INSUFFICIENT ACTIVITY DETECTED
- DTC P0155 - LEFT FRONT OXYGEN SENSOR HEATER MALFUNCTION
- DTC P0160 - LEFT REAR OXYGEN SENSOR, INSUFFICIENT ACTIVITY DETECTED
- DTC P0161 - LEFT REAR OXYGEN SENSOR HEATER MALFUNCTION
- DTC P0170 - BANK NO. 1, FUEL TRIM MALFUNCTION
- DTC P0173 - BANK NO. 2, FUEL TRIM MALFUNCTION
- DTC P0300 - RANDOM MISFIRE DETECTED
- DTC P0301 - CYLINDER NO. 1 MISFIRE DETECTED
- DTC P0302 - CYLINDER NO. 2 MISFIRE DETECTED
- DTC P0303 - CYLINDER NO. 3 MISFIRE DETECTED
- DTC P0304 - CYLINDER NO. 4 MISFIRE DETECTED
- DTC P0305 - CYLINDER NO. 5 MISFIRE DETECTED
- DTC P0306 - CYLINDER NO. 6 MISFIRE DETECTED
- DTC P0325 - KNOCK SENSOR NO. 1 CIRCUIT MALFUNCTION
- DTC P0335 - CRANKSHAFT POSITION SENSOR CIRCUIT MALFUNCTION
- DTC P0400 - EGR FLOW MALFUNCTION
- DTC P0404 - EGR RANGE/PERFORMANCE MALFUNCTION
- DTC P0420 - BANK NO. 1 CATALYTIC CONVERTER EFFICIENCY BELOW LIMIT
- DTC P0430 - BANK NO. 2 CATALYTIC CONVERTER EFFICIENCY BELOW LIMIT
- DTC P0442 - EVAP SYSTEM MALFUNCTION, LEAK DETECTED
- DTC P0443 - EVAP SYSTEM, PURGE CONTROL VALVE CIRCUIT MALFUNCTION
- DTC P0446 - CANISTER DRAIN CUT VALVE (CDCV) MALFUNCTION
- DTC P0450 - FUEL TANK PRESSURE SENSOR MALFUNCTION
- DTC P0455 - EVAP SYSTEM MALFUNCTION, EXCESSIVE LEAK DETECTED
- DTC P0500 - VEHICLE SPEED SENSOR (VSS) MALFUNCTION
- DTC P0505 - IDLE CONTROL SYSTEM MALFUNCTION
- DTC P0510 - CLOSED THROTTLE POSITION SWITCH MALFUNCTION
- DTC P0703 - BRAKE SWITCH MALFUNCTION
- DTC P1110 - INTAKE AIR TEMPERATURE (IAT) SENSOR, OPEN OR SHORT CIRCUIT
- DTC P1110 - INTAKE AIR TEMPERATURE (IAT) SENSOR, OPEN OR SHORT CIRCUIT (2)
- DTC P1170 - RIGHT FRONT OXYGEN SENSOR, ACTIVITY NOT DETECTED
- DTC P1173 - LEFT FRONT OXYGEN SENSOR, ACTIVITY NOT DETECTED
- DTC P1196 - STARTER SWITCH, OPEN OR SHORT CIRCUIT
- DTC P1250 - PRESSURE REGULATOR CONTROL (PRC) SOLENOID VALVE MALFUNCTION
- DTC P1345 - CAMSHAFT POSITION SENSOR, NO SGC SIGNAL
- DTC P1402 - EGR VALVE POSITION SENSOR (EGRS), OPEN OR SHORT CIRCUIT
- DTC P1449 - CANISTER DRAIN CUT VALVE (CDCV), OPEN OR SHORT CIRCUIT
- DTC P1450 - EVAP SYSTEM, LEAK DOWN
- DTC P1455 - FUEL TANK LEVEL, OPEN OR SHORT CIRCUIT
- DTC P1485 - EGR SOLENOID VALVE (VACUUM), OPEN OR SHORT CIRCUIT
- DTC P1486 - EGR SOLENOID VALVE (VENT), OPEN OR SHORT CIRCUIT
- DTC P1487 - MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR SOLENOID VALVE, OPEN OR SHORT CIRCUIT
- DTC P1508 - BY-PASS AIR SOLENOID VALVE, OPEN OR SHORT CIRCUIT
- DTC P1524 - CHARGE AIR COOLER BY-PASS SOLENOID VALVE, OPEN OR SHORT CIRCUIT
- DTC P1525 - AIR BY-PASS SOLENOID VALVE (VACUUM), OPEN OR SHORT CIRCUIT
- DTC P1526 - AIR BY-PASS SOLENOID VALVE (VENT), OPEN OR SHORT CIRCUIT
- DTC P1540 - AIR BY-PASS SYSTEM, OPEN OR SHORT CIRCUIT
- DTC P1601 - COMMUNICATION LINE ERROR (AUTOMATIC TRANSMISSION)
- DTC P1609 - ENGINE CONTROL MODULE (CPU) MALFUNCTION
- DTC P1609 - ENGINE CONTROL MODULE (CPU) MALFUNCTION (2)
- DTC P1627 - ENGINE CONTROL MODULE (ECM)/TRACTION CONTROL SYSTEM (TCS) LINE COMMUNICATION ERROR
- DTC P1794 - BATTERY SUPPLY CIRCUIT MALFUNCTION
- Engine Controls - Tests W/codes - 2.5L: Overview
- Engine Controls - Tests W/codes - 2.5L: Diagnosis
- Engine Controls - Tests W/codes - 2.5L: Component Locations
- Engine Controls - Tests W/codes - 2.5L: Other
- DTC P0100 - MASS AIR FLOW (MAF) SENSOR CIRCUIT MALFUNCTION
- DTC P0110 - INTAKE AIR TEMPERATURE (IAT) SENSOR CIRCUIT MALFUNCTION
- DTC P0115 - ENGINE COOLANT TEMPERATURE (ECT) SENSOR CIRCUIT MALFUNCTION
- DTC P0120 - THROTTLE POSITION (TP) SENSOR CIRCUIT MALFUNCTION
- DTC P0125 - EXCESSIVE TIME TO ENTER CLOSED LOOP
- DTC P0130 - RIGHT FRONT HEATED OXYGEN SENSOR MALFUNCTION
- DTC P0134 - RIGHT FRONT OXYGEN SENSOR, INSUFFICIENT ACTIVITY DETECTED
- DTC P0135 - RIGHT FRONT OXYGEN SENSOR HEATER MALFUNCTION
- DTC P0136 - MIDDLE HEATED OXYGEN SENSOR MALFUNCTION
- DTC P0140 - MIDDLE OXYGEN SENSOR, INSUFFICIENT ACTIVITY DETECTED
- DTC P0141 - MIDDLE OXYGEN SENSOR HEATER MALFUNCTION
- DTC P0146 - REAR OXYGEN SENSOR, INSUFFICIENT ACTIVITY DETECTED
- DTC P0147 - REAR OXYGEN SENSOR HEATER MALFUNCTION
- DTC P0150 - LEFT FRONT HEATED OXYGEN SENSOR MALFUNCTION
- DTC P0154 - LEFT FRONT OXYGEN SENSOR, INSUFFICIENT ACTIVITY DETECTED
- DTC P0155 - LEFT FRONT OXYGEN SENSOR HEATER MALFUNCTION
- DTC P0170 - BANK NO. 1, FUEL TRIM MALFUNCTION
- DTC P0173 - BANK NO. 2, FUEL TRIM MALFUNCTION
- DTC P0300 - RANDOM MISFIRE DETECTED
- DTC P0301 - CYLINDER NO. 1 MISFIRE DETECTED
- DTC P0302 - CYLINDER NO. 2 MISFIRE DETECTED
- DTC P0303 - CYLINDER NO. 3 MISFIRE DETECTED
- DTC P0304 - CYLINDER NO. 4 MISFIRE DETECTED
- DTC P0305 - CYLINDER NO. 5 MISFIRE DETECTED
- DTC P0306 - CYLINDER NO. 6 MISFIRE DETECTED
- DTC P0325 - KNOCK SENSOR NO. 1 CIRCUIT MALFUNCTION
- DTC P0335 - CRANKSHAFT POSITION SENSOR CIRCUIT MALFUNCTION
- DTC P0400 - EGR FLOW MALFUNCTION
- DTC P0404 - EGR RANGE/PERFORMANCE MALFUNCTION
- DTC P0420 - BANK NO. 1 CATALYTIC CONVERTER EFFICIENCY BELOW LIMIT
- DTC P0442 - EVAP SYSTEM MALFUNCTION
- DTC P0443 - EVAP SYSTEM, PURGE CONTROL VALVE CIRCUIT MALFUNCTION
- DTC P0446 - CANISTER DRAIN CUT VALVE (CDCV) MALFUNCTION
- DTC P0450 - FUEL TANK PRESSURE SENSOR MALFUNCTION
- DTC P0455 - EVAP SYSTEM MALFUNCTION, EXCESSIVE LEAK DETECTED
- DTC P0500 - VEHICLE SPEED SENSOR (VSS) MALFUNCTION
- DTC P0505 - IDLE CONTROL SYSTEM MALFUNCTION
- DTC P0510 - CLOSED THROTTLE POSITION SWITCH MALFUNCTION
- DTC P0703 - BRAKE SWITCH MALFUNCTION
- DTC P1169 - MIDDLE OXYGEN SENSOR, ACTIVITY NOT DETECTED
- DTC P1170 - RIGHT FRONT OXYGEN SENSOR, ACTIVITY NOT DETECTED
- DTC P1173 - LEFT FRONT OXYGEN SENSOR, ACTIVITY NOT DETECTED
- DTC P1195 - EGR BOOST SENSOR, BAROMETRIC PRESSURE SIGNAL MALFUNCTION
- DTC P1196 - STARTER SWTICH, OPEN OR SHORT CIRCUIT
- DTC P1250 - PRESSURE REGULATOR CONTROL (PRC) SOLENOID VALVE MALFUNCTION
- DTC P1345 - CAMSHAFT POSITION SENSOR, NO SGC SIGNAL
- DTC P1402 - EGR VALVE POSITION SENSOR (EGRS), OPEN OR SHORT CIRCUIT
- DTC P1449 - CANISTER DRAIN CUT VALVE (CDCV), OPEN OR SHORT CIRCUIT
- DTC P1450 - EVAP SYSTEM, LEAK DOWN
- DTC P1455 - FUEL TANK LEVEL, OPEN OR SHORT CIRCUIT
- DTC P1487 - EGR BOOST SENSOR SOLENOID VALVE, OPEN OR SHORT CIRCUIT
- DTC P1521 - VARIABLE RESONANCE INDUCTION SYSTEM NO. 1 (VRIS1), OPEN OR SHORT CIRCUIT
- DTC P1522 - VARIABLE RESONANCE INDUCTION SYSTEM NO. 1 (VRIS2), OPEN OR SHORT CIRCUIT
- DTC P1609 - POWERTRAIN CONTROL MODULE (CPU) MALFUNCTION
- DTC P1794 - BATTERY SUPPLY CIRCUIT MALFUNCTION
- DTC P1797 - TRANSMISSION RANGE SWITCH (A/T) MALFUNCTION
- Engine Controls - System/component Tests - 2.3L: Diagnosis
- Engine Controls - System/component Tests - 2.3L: Maintenance
- Engine Controls - System/component Tests - 2.3L: Other
- Engine Controls - System/component Tests - 2.5L: Diagnosis
- Engine Controls - System/component Tests - 2.5L: Maintenance
- Engine Controls - System/component Tests - 2.5L: Other
- Engine Controls - Tests W/o Codes - 2.3L: Diagnosis
- Engine Controls - Tests W/o Codes - 2.3L: NVH
- Engine Controls - Tests W/o Codes - 2.3L: Other
- Engine Controls - Tests W/o Codes - 2.5L: Diagnosis
- Engine Controls - Tests W/o Codes - 2.5L: NVH
- Engine Controls - Tests W/o Codes - 2.5L: Other
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