LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Porsche >> 1997 >> Boxster Automatic >> Repair and Diagnosis >> Engine Performance >> System >> DME 5.2.2 Diagnosis >> Fault Texts >> MIL (Check Engine Malfunction Indicator Light)
April 5, 2026: LEMON Manuals is launched! Read the announcement.

MIL (Check Engine Malfunction Indicator Light)

MIL is not triggered with this fault

MIL is on, emission relevant fault

MIL is flashing, fault damaging to TWC

Only in combination with misfiring

Fig 1: Identifying DTC To Fault Type (1 Of 5)
G02533541Courtesy of PORSCHE OF NORTH AMERICA, INC.
Fig 2: Identifying DTC To Fault Type (2 Of 5)
G02533542Courtesy of PORSCHE OF NORTH AMERICA, INC.
Fig 3: Identifying DTC To Fault Type (3 Of 5)
G02533543Courtesy of PORSCHE OF NORTH AMERICA, INC.
Fig 4: Identifying DTC To Fault Type (4 Of 5)
G02533544Courtesy of PORSCHE OF NORTH AMERICA, INC.
Fig 5: Identifying DTC To Fault Type (5 Of 5)
G02533545Courtesy of PORSCHE OF NORTH AMERICA, INC.
DIAGNOSTIC TROUBLE CODES (DTC) LIST

DTC Description
DTC P0101  Mass Air Flow Sensor Signal implausible
DTC P0102  Mass Air Flow Sensor, below lower limit
DTC P0103  Mass Air Flow Sensor, above upper limit
DTC P0112  Intake Air Temperature Circuit - Low Input
DTC P0113  Intake Air Temperature Circuit - High Input
DTC P0115  ECT Sensor signal implausible
DTC P0117  ECT Engine Coolant Temperature - Malfunction
DTC P0118  ECT Engine Coolant Temperature - Above Upper limit
DTC P0122  Throttle Position Sensor - Below Limit
DTC P0123  Throttle Position Sensor - Above Limit
DTC P0123  Throttle Position (TP) Sensor - Signal Implausible
DTC P0130  Oxygen Sensor Ahead of Catalytic Converter (Cylinders 1-3) - Short Circuit of Wires or Limited Voltage Increase
DTC P0131  Oxygen Sensor Ahead of Catalytic Converter (Cylinders 1 - 3) - Short Circuit to Ground at Signal Wire or Incorrect Voltage
DTC P0132  Oxygen Sensor Ahead of Catalytic Converter (Cylinders 1 - 3) - Short Circuit to Plus
DTC P0133  Aging of Oxygen Sensor Ahead of Three Way Catalytic Converter (TWC) (cylinders 1 - 3)
DTC P1275  Aging of Oxygen Sensor Ahead of Three Way Catalytic Converter (cylinders 1 - 3) - Below Lower Limit
DTC P0153  Aging of Oxygen Sensor Ahead of Three Way Catalytic Converter (TWC) (cylinders 4 - 6)
DTC P1276  Aging of Oxygen Sensor Ahead of Three Way Catalytic Converter (cylinders 4 - 6) - Below Lower Limit
DTC P0134  Oxygen Sensor Ahead of Catalytic Converter (Cylinders 1 - 3) - Interruption of Signal
DTC P0138  Oxygen Sensor Behind Catalytic Converter (Cylinders 1 - 3) - Short Circuit to Plus
DTC P0139  Aging of Oxygen Sensor After Three Way Catalytic Converter (TWC) (cylinders 1 - 3)
DTC P0159  Aging of Oxygen Sensor After Three Way Catalytic Converter (TWC) (cylinders 4 - 6)
DTC P0140  Oxygen Sensor Behind Catalytic Converter (Cylinders 1 - 3) - Interruption of Signal
DTC P0341  Camshaft Position (CMP) Sensor 1 Signal Implausible, Short Circuit to Ground, Short Circuit to Plus
DTC P1397  Camshaft Position (CMP) Sensor 2 Signal Implausible, Short Circuit to Ground, Short Circuit to Plus
DTC P0150  Oxygen Sensor Ahead of Catalytic Converter (Cylinders 4 - 6) - Short Circuit of Wires or Limited Voltage Increase
DTC P0151  Oxygen Sensor Ahead of Catalytic Converter (Cylinders 4 - 6) - Short Circuit to Ground at Signal Wire or Incorrect Voltage
DTC P0152  Oxygen Sensor Ahead of Catalytic Converter (Cylinders 4 - 6) - Short Circuit to Plus
DTC P0154  Oxygen Sensor Ahead of Catalytic Converter (Cylinders 4 - 6) - Interruption of Signal
DTC P0156  Oxygen Sensor Behind Catalytic Converter (Cylinders 4 - 6) - Short Circuit of Wires
DTC P0157  Oxygen Sensor Behind Catalytic Converter (Cylinders 4 - 6) - Short Circuit to Ground at Signal Wire or Incorrect Voltage
DTC P0158  Oxygen Sensor Behind Catalytic Converter (Cylinders 4 - 6) Short Circuit to Plus
DTC P0160  Oxygen Sensor Behind Catalytic Converter (Cylinders 4 - 6) - Interruption of Signal
DTC P0197  Oil Temperature Sensor - Short Circuit to Ground
DTC P0198  Oil Temperature Sensor - Short Circuit to Plus
DTC P0300  Misfire Damaging to Catalytic Converter
DTC P0301  Misfire, Cylinder 1, Damaging to Catalytic Converter
DTC P0302  Misfire, Cylinder 2, Damaging to Catalytic Converter
DTC P0303  Misfire, Cylinder 3, Damaging to Catalytic Converter
DTC P0304  Misfire, Cylinder 4, Damaging to Catalytic Converter
DTC P0305  Misfire, Cylinder 5, Damaging to Catalytic Converter
DTC P0306  Misfire, Cylinder 6, Damaging to Catalytic Converter
DTC P1313  Misfire, Cylinder 1, Emission Related
DTC P1314  Misfire, Cylinder 2, Emission Related
DTC P1315  Misfire, Cylinder 3, Emission Related
DTC P1316  Misfire, Cylinder 4, Emission Related
DTC P1317  Misfire, Cylinder 5, Emission Related
DTC P1318  Misfire, Cylinder 6, Emission Related
DTC P1319  Misfire, Emission Related
DTC P1585  Misfire with empty fuel tank
DTC P0336  Crankshaft Position Sensor - not in specified range
DTC P0341  Camshaft Position (CMP) Sensor 1 Signal Implausible, Short Circuit to Ground, Short Circuit to Plus
DTC P1397  Camshaft Position (CMP) Sensor 2 Signal Implausible, Short Circuit to Ground, Short Circuit to Plus
DTC P0410  Secondary Air Injection System - Signal Implausible (Cylinders 1 - 3)
DTC P1411  Secondary Air Injection System - Signal Implausible (Cylinders 4-6)
DTC P0420  TWC Conversion Too Low (cylinders 1 - 3)
DTC P0430  TWC Conversion Too Low (cylinders 4 - 6)
DTC P0440  Fuel Tank Ventilation Malfunction
DTC P0441  Fuel Tank Ventilation System - Above Limit
DTC P0442  Fuel Tank Ventilation System (Micro-leak) - Below Limit
DTC P0444  EVAP Canister Purge Valve - Open Circuit
DTC P0445  EVAP Canister Purge Valve - Short Circuit to Plus/Short Circuit to Ground
DTC P0446  EVAP Canister Shutoff Valve (Function) - Below Limit
DTC P0447  EVAP Canister Shutoff Valve (Output Stage) - Open Circuit
DTC P0448  EVAP Canister Shutoff Valve (Output Stage) - Above/Below Limit
DTC P0450  Tank Pressure Sensor - Signal Implausible
DTC P0452  Tank Pressure Sensor - Below Limit
DTC P0453  Tank Pressure Sensor - Above Limitc
DTC P0455  Fuel Tank Ventilation System (Major Leak) - Below Limit
DTC P0501  Vehicle Speed Sensor (VSS) not in specified range
DTC P0506  Idle Air Control - Engine speed too low
DTC P0507  Idle Air Control - Engine speed too high
DTC P0600  CAN Timeout - Signal Implausible
DTC P0603  ECM faulty
DTC P0604  ECM faulty
DTC P0605  ECM faulty
DTC P1640  ECM faulty
DTC P1689  ECM faulty
DTC P1102  Oxygen sensor heating 1 ahead of catalytic converter - above upper limit
DTC P1107  Oxygen sensor heating 2 ahead of catalytic converter - above upper limit
DTC P1105  Oxygen sensor heating 1 behind catalytic converter - above upper limit
DTC P1110  Oxygen sensor heating 2 behind catalytic converter - above upper limit
DTC P1115  Oxygen sensor heating 1 ahead of catalytic converter - below lower threshold
DTC P1119  Oxygen sensor heating 2 ahead of catalytic converter - below lower threshold
DTC P1117  Oxygen sensor heating 1 behind of catalytic converter - below lower threshold
DTC P1121  Oxygen sensor heating 2 behind of catalytic converter - below lower threshold
DTC P1124  Oxygen Sensing Adaptation Range 1 (Cylinders 1 - 3) Enrichment Limit
DTC P1126  Oxygen Sensing Adaptation Range 1 (Cylinders 4 - 6) Enrichment Limit
DTC P1123  Oxygen Sensing Adaptation Range 1 (Cylinders 1 - 3) Lean Limit
DTC P1125  Oxygen Sensing Adaptation Range 1 (Cylinders 4 - 6) Lean Limit
DTC P1127  Oxygen Sensing Adaptation Range 2 (Cylinders 1 - 3) Lean Limit
DTC P1129  Oxygen Sensing Adaptation Range 2 (Cylinders 4 - 6) Lean Limit
DTC P1128  Oxygen Sensing Adaptation Range 2 (cylinder 1 - 3) - Enrichment limit
DTC P1130  Oxygen Sensing Adaptation Range 2 (cylinder 4 - 6) - Enrichment limit
DTC P1140  Load Calculation - Signal implausible
DTC P1157  Engine Compartment Temperature Sensor - Short Circuit to Ground
DTC P1158  Engine Compartment Temperature Sensor - Short Circuit to Plus
DTC P1213  Injector Circuit Cylinder 1 - Short to B+
DTC P1225  Fuel injector, cylinder 1 - Short to Ground
DTC P1237  Fuel injector, cylinder 1 - Interruption
DTC P1214  Injector Circuit, Cylinder 2 - Short to B+
DTC P1226  Fuel Injector, cylinder 2 - Short to Ground
DTC P1238  Fuel Injector, cylinder 2 - Interruption
DTC P1215  Fuel Injector, cylinder 3 - Short to B+
DTC P1227  Fuel Injector, cylinder 3 - Short to Ground
DTC P1239  Fuel Injector, cylinder 3 - Interruption
DTC P1216  Injector Circuit, Cylinder 4 - Short to B+
DTC P1228  Fuel Injector, cylinder 4 - Short to Ground
DTC P1240  Fuel Injector, cylinder 4 - Interruption
DTC P1217  Fuel Injector, cylinder 5 - Short to B+
DTC P1229  Fuel Injector, cylinder 5 - Short to Ground
DTC P1241  Fuel Injector, cylinder 5 - Interruption
DTC P1218  Fuel Injector, cylinder 6 - Short to B+
DTC P1230  Fuel Injector, cylinder 6 - Short to Ground
DTC P1242  Fuel Injector, cylinder 6 - Interruption
DTC P1265  Airbag Signal - Signal Implausible
DTC P1324  Timing Chain out of Position, Bank 2 - Below Lower Limit
DTC P1324  Timing Chain out of Position, Bank 2 - Above Upper Limit
DTC P1340  Timing Chain out of Position, Bank 1 - Below Lower Limit
DTC P1340  Timing Chain out of Position, Bank 1 - Above Upper Limit
DTC P1384  Knock Sensor 1 - Signal Implausible
DTC P1385  Knock Sensor 2 - Signal Implausible
DTC P1386  Knock Control Test Pulse - Signal Implausible
DTC P1455  A/C compressor control - Interruption
DTC P1456  A/C compressor control - upper limit exceeded
DTC P1457  A/C compressor control - below lower limit
DTC P1501  End Stage Fuel Pump Relay - Short Circuit to Ground
DTC P1502  End Stage Fuel Pump Relay - Short Circuit to Plus
DTC P1541  End Stage Fuel Pump Relay - Interruption
DTC P1510  Idle Control Valve Opening Coil - Open
DTC P1513  Idle Control Valve Opening Coil - Open
DTC P1514  Idle Control Valve Opening Coil - Open
DTC P1524  Camshaft Adjustment, Bank 2
DTC P1539  Camshaft Adjustment, Bank 2
DTC P1530  Camshaft Adjustment, Bank 1
DTC P1531  Camshaft Adjustment, Bank 1
DTC P1551  Idle Air Control (IAC) Valve - Interruption
DTC P1552  Idle Air Control (IAC) Valve Closing Coil - Below Lower Limit
DTC P1553  Idle Air Control (IAC) Valve Closing Coil - Upper Limit Exceeded
DTC P1570  Immobilizer - Active Immobilizer - Implausible operating range
DTC P1571  Immobilizer - Open Immobilizer - Interruption / no signal
DTC P1600  Power Supply - Signal Implausible
DTC P1600  Power Supply - Below Lower Limit
DTC P1601  Power Supply - Above Upper Limit
DTC P1671  Engine Compartment Purge Fan End-Stage - Open Circuit
DTC P1671  Engine Compartment Purge Fan End-Stage - Short Circuit to Ground
DTC P1671  Engine Compartment Purge Fan End-Stage - Short Circuit to B+
DTC P1673  Fan End-Stage - Open Circuit
DTC P1673  Fan End-Stage - Short Circuit to Ground
DTC P1673  Fan End-Stage - Short Circuit to Plus
DTC P1691  Malfunction Indication Light (MIL), Check engine - Interruption
DTC P1692  MIL Check engine - Short Circuit to Ground
DTC P1693  MIL Check engine - Short Circuit to B+
DTC P1782  Engine Engagement / Nominal Engine Torque - Short Circuit to Ground