P1400

DPFE Sensor Low Voltage (Mazda)

P1400

DPFE Sensor Low Voltage (Ford)

P1401

DPFE Sensor High Voltage (Mazda)

P1401

DPFE Sensor High Voltage (Ford)

P1403

DPFE Hoses Reversed (Mazda)

P1403

No 5 Volts To EGR Sensor (Chrysler)

P1404

Exhaust Gas Recirculation (EGR) Valve Pintle Stuck Open

P1405

DPFE Upstream Hose Off Or Plugged (Mazda)

P1405

DPFE Upstream Hose Off Or Plugged (Ford)

P1406

DPFE Downstream Hose Off Or Plugged (Mazda)

P1406

DPFE Downstream Hose Off Or Plugged (Ford)

P1407

EGR No Flow Detected (Mazda)

P1408

EGR Out Of Self Test Range (Mazda)

P1408

EGR Out Of Self Test Range (Ford)

P1409

Electronic Vacuum Regulator Control Circuit Malfunction (Mazda)

P1409

EGR Vacuum Regulator Solenoid Circuit Malfunction (Ford)

P1411

Secondary Air Injection System Downstream Flow (Ford)

P1413

Secondary Air Injection System Monitor Circuit Low (Ford)

P1414

Secondary Air Injection System Monitor Circuit High (Ford)

P1432

THTRC Circuit Failure (Ford)

P1441

Evaporative System Flow During Non-Purge

P1443

Evaporative Emission Control System (Mazda)

P1443

Small Or No Purge Flow Condition (Ford)

P1444

Purge Flow Sensor Low Input (Mazda)

P1445

Purge Flow Sensor High Input (Mazda)

P1450

Unable To Bleed Up Fuel Tank Vacuum (Ford)

P1451

EVAP Control System Canister Vent Solenoid Circuit Malfunction (Ford)

P1457

Leak Detected In EVAP Control Sys.(EVAP Canister Sys.) (Acura)

P1460

WOT A/C Cutoff Circuit Malfunction (Mazda)

P1460

WOT A/C Cutoff Circuit Malfunction (Ford)

P1461

ACP Sensor High Voltage (Ford)

P1462

ACP Sensor Low Voltage (Ford)

P1463

ACP Sensor Insufficent Pressure Change (Ford)

P1464

A/C Demand Out Of Range (Ford)

P1469

Low A/C Cycling Period (Ford)

P1474

HCF Primary Circuit Failure (Ford)

P1474

LFC Primary Circuit Failure (Ford)

P1476

Too Little Secondary Air (Chrysler)

P1477

Too Much Secondary Air (Chrysler)

P1477

MFC Primary Circuit Failure (Ford)

P1478

Battery Temp Sensor Volts Out of Limit (Chrysler)

P1479

HFC Primary Circuit Failure (Ford)

P1479

Transmission Fan Relay Circuit (Chrysler)

P1480

PCV Solenoid Valve (Chrysler)

P1482

Catalyst Temperature Sensor Circuit Shorted Low (Chrysler)

P1483

Engine Cooling System Performance

P1483

Catalyst Temperature Sensor Circuit Shorted High (Chrysler)

P1484

Catalytic Converter overheat Detected (Chrysler)

P1485

Air Injection Solenoid Circuit (Chrysler)

P1486

Evap Leak Monitor Pinched Hose (Chrysler)

P1487

Hi Speed Rad Fan CTRL Relay Circuit (Chrysler)

P1488

Auxiliary 5 Volt Supply Output Too Low (Chrysler)

P1489

High Speed Fan CTRL Relay Circuit (Chrysler)

P1490

Low Speed Fan CTRL Relay Circuit (Chrysler)

P1491

Rad Fan Control Relay Circuit (Chrysler)

P1491

Malfunction In EGR System (Acura)

P1492

Ambient/Batt Temp Sen Volts Too High (Chrysler)

P1493

Ambient/Batt Temp Sen Volts Too Low (Chrysler)

P1494

Leak Detection Pump Switch or Mechanical Fault (Chrysler)

P1495

Leak Detection Pump Solenoid Circuit (Chrysler)

P1496

5 Volt Supply Output Too Low (Chrysler)

P1498

High speed Rad Fan Ground CTRL Rly Circuit (Chrysler)

P1498

Voltage Problem In EGR Valve Position Sensor Circuit (Acura)

Misfire Detection Monitor – Cylinder 12 Misfire

Description:

How does a P0312 code trigger the check engine light? This code will trigger the check engine light as follows:

The misfire detection monitor, a software strategy built into the computer, is designed to detect an engine misfire. The computer can also normally identify the specific cylinder in which the misfire has occurred. A misfire is nothing more than a lack of combustion, which can be caused by poor fuel quality or metering, low compression, lack of spark or unmetered air entering the engine. There are other possible, less obvious causes as well, such as uncommanded Exhaust Gas Recirculatin (EGR), flow. When the misfire monitor detects a misfire, it will trigger the check engine light with the specific cylinder number as the last digit in the P030X code. For instance cylinder 1 misfire is P0301, cylinder 2 is P0302 etc. In this case we are left with a P0312 in the computer memory.

Possible Causes:

Fuel injectors, related wiring, sensors and computer issues
Running out of gas, or poor fuel quality
Evaporative emissions system (EVAP) concerns: fuel vapors leaking into engine
Incorrect Fuel Pressure
EGR system concerns: leaking EGR valve or restricted ports
Base engine concerns: low compression, valve train problems and timing issues
Ignition system concerns including, but not limited to:
Faulty spark plugs
Faulty coil or related wiring
Ignition module or related wiring issues
Ignition related sensor faults or wiring issues

Diagnostic Help:

To diagnose a P0312 trouble code we begin by checking for proper fuel and ignition system operation, and then follow up with the less likely causes listed above, such as EGR and EVAP system problems. New style coil on plug applications have a high failure rate, and can be concluded faulty by swapping to another cylinder and checking to see if the misfire moves to that cylinder. This is a quick check if a capable scan tool or oscilloscope is not available. Always make sure the basic maintenance is done first and that things such as the fuel filter, air filter, spark plugs and spark plug wires are in good working order, as these are all possible candidates for a problem. If necessary, check for wiring and component concerns. See our article “Automotive Circuit Testing 101”, if you need more assistance with this. If concern is determined to be intermittent, check out our article on intermittent diagnosis and wiggle test connectors and wiring, attempting to duplicate concern. You may also use the “Get Help” link if you need specifications or have any other related questions. Remember to refer to an appropriate manual for specific instruction.

Misfire Detection Monitor – Cylinder 11 Misfire

Description:

How does a P0311 code trigger the check engine light? This code will trigger the check engine light as follows:

The misfire detection monitor, a software strategy built into the computer, is designed to detect an engine misfire. The computer can also normally identify the specific cylinder in which the misfire has occurred. A misfire is nothing more than a lack of combustion, which can be caused by poor fuel quality or metering, low compression, lack of spark or unmetered air entering the engine. There are other possible, less obvious causes as well, such as uncommanded Exhaust Gas Recirculatin (EGR), flow. When the misfire monitor detects a misfire, it will trigger the check engine light with the specific cylinder number as the last digit in the P030X code. For instance cylinder 1 misfire is P0301, cylinder 2 is P0302 etc. In this case we are left with a P0311 in the computer memory.

Possible Causes:

Fuel injectors, related wiring, sensors and computer issues
Running out of gas, or poor fuel quality
Evaporative emissions system (EVAP) concerns: fuel vapors leaking into engine
Incorrect Fuel Pressure
EGR system concerns: leaking EGR valve or restricted ports
Base engine concerns: low compression, valve train problems and timing issues
Ignition system concerns including, but not limited to:
Faulty spark plugs
Faulty coil or related wiring
Ignition module or related wiring issues
Ignition related sensor faults or wiring issues

Diagnostic Help:

To diagnose a P0311 trouble code we begin by checking for proper fuel and ignition system operation, and then follow up with the less likely causes listed above, such as EGR and EVAP system problems. New style coil on plug applications have a high failure rate, and can be concluded faulty by swapping to another cylinder and checking to see if the misfire moves to that cylinder. This is a quick check if a capable scan tool or oscilloscope is not available. Always make sure the basic maintenance is done first and that things such as the fuel filter, air filter, spark plugs and spark plug wires are in good working order, as these are all possible candidates for a problem. If necessary, check for wiring and component concerns. See our article “Automotive Circuit Testing 101”, if you need more assistance with this. If concern is determined to be intermittent, check out our article on intermittent diagnosis and wiggle test connectors and wiring, attempting to duplicate concern. You may also use the “Get Help” link if you need specifications or have any other related questions. Remember to refer to an appropriate manual for specific instruction.

Misfire Detection Monitor – Cylinder 10 Misfire

Description:

How does a P0310 code trigger the check engine light? This code will trigger the check engine light as follows:

The misfire detection monitor, a software strategy built into the computer, is designed to detect an engine misfire. The computer can also normally identify the specific cylinder in which the misfire has occurred. A misfire is nothing more than a lack of combustion, which can be caused by poor fuel quality or metering, low compression, lack of spark or unmetered air entering the engine. There are other possible, less obvious causes as well, such as uncommanded Exhaust Gas Recirculatin (EGR), flow. When the misfire monitor detects a misfire, it will trigger the check engine light with the specific cylinder number as the last digit in the P030X code. For instance cylinder 1 misfire is P0301, cylinder 2 is P0302 etc. In this case we are left with a P0310 in the computer memory.

Possible Causes:

Fuel injectors, related wiring, sensors and computer issues
Running out of gas, or poor fuel quality
Evaporative emissions system (EVAP) concerns: fuel vapors leaking into engine
Incorrect Fuel Pressure
EGR system concerns: leaking EGR valve or restricted ports
Base engine concerns: low compression, valve train problems and timing issues
Ignition system concerns including, but not limited to:
Faulty spark plugs
Faulty coil or related wiring
Ignition module or related wiring issues
Ignition related sensor faults or wiring issues

Diagnostic Help:

To diagnose a P0310 trouble code we begin by checking for proper fuel and ignition system operation, and then follow up with the less likely causes listed above, such as EGR and EVAP system problems. New style coil on plug applications have a high failure rate, and can be concluded faulty by swapping to another cylinder and checking to see if the misfire moves to that cylinder. This is a quick check if a capable scan tool or oscilloscope is not available. Always make sure the basic maintenance is done first and that things such as the fuel filter, air filter, spark plugs and spark plug wires are in good working order, as these are all possible candidates for a problem. If necessary, check for wiring and component concerns. See our article “Automotive Circuit Testing 101”, if you need more assistance with this. If concern is determined to be intermittent, check out our article on intermittent diagnosis and wiggle test connectors and wiring, attempting to duplicate concern. You may also use the “Get Help” link if you need specifications or have any other related questions. Remember to refer to an appropriate manual for specific instruction.

Misfire Detection Monitor – Cylinder 9 Misfire

Description:

How does a P0309 code trigger the check engine light? This code will trigger the check engine light as follows:

The misfire detection monitor, a software strategy built into the computer, is designed to detect an engine misfire. The computer can also normally identify the specific cylinder in which the misfire has occurred. A misfire is nothing more than a lack of combustion, which can be caused by poor fuel quality or metering, low compression, lack of spark or unmetered air entering the engine. There are other possible, less obvious causes as well, such as uncommanded Exhaust Gas Recirculatin (EGR), flow. When the misfire monitor detects a misfire, it will trigger the check engine light with the specific cylinder number as the last digit in the P030X code. For instance cylinder 1 misfire is P0301, cylinder 2 is P0302 etc. In this case we are left with a P0309 in the computer memory.

Possible Causes:

Fuel injectors, related wiring, sensors and computer issues
Running out of gas, or poor fuel quality
Evaporative emissions system (EVAP) concerns: fuel vapors leaking into engine
Incorrect Fuel Pressure
EGR system concerns: leaking EGR valve or restricted ports
Base engine concerns: low compression, valve train problems and timing issues
Ignition system concerns including, but not limited to:
Faulty spark plugs
Faulty coil or related wiring
Ignition module or related wiring issues
Ignition related sensor faults or wiring issues

Diagnostic Help:

To diagnose a P0309 trouble code we begin by checking for proper fuel and ignition system operation, and then follow up with the less likely causes listed above, such as EGR and EVAP system problems. New style coil on plug applications have a high failure rate, and can be concluded faulty by swapping to another cylinder and checking to see if the misfire moves to that cylinder. This is a quick check if a capable scan tool or oscilloscope is not available. Always make sure the basic maintenance is done first and that things such as the fuel filter, air filter, spark plugs and spark plug wires are in good working order, as these are all possible candidates for a problem. If necessary, check for wiring and component concerns. See our article Automotive Circuit Testing 101, if you need more assistance with this. If concern is determined to be intermittent, check out our article on intermittent diagnosis and wiggle test connectors and wiring, attempting to duplicate concern. You may also use the “Get Help” link if you need specifications or have any other related questions. Remember to refer to an appropriate manual for specific instruction.

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