Troubleshooting; Diagnostic Trouble Codes For The Mefi 1 454 / 502 Mag Mpi And 8.2L Mpi Engines; Mefi 2 7.4L Mpi Engines; (8.2L) Engines - Mercury MerCruiser MCM 454 Mag MPI Service Manual

FUEL INJECTION SYSTEM TROUBLESHOOTING

Troubleshooting

Diagnostic Trouble Codes for the MEFI 1 454 / 502 Mag MPI and 8.2L MPI
Engines
Code Number
Code 14
Code 21
Code 23
Code 33
Code 42
Code 43
Code 51
Diagnostic Trouble Codes for the MEFI 2 7.4L MPI Engines
Code Number
Code 14
Code 15
Code 21
Code 22
Code 23
Code 25
Code 33
Code 41
Code 42
Code 43
Code 44
Code 51
Code 52
Index
Page 5D-2
Downloaded from https://needmanual.com/
(ECT) Engine Coolant Temperature
(TP) Throttle Position Sensor
(IAT) Intake Air Temperature
(MAP) Manifold Absolute Pressure
(IC) Ignition Control
(KS) Knock Sensor
Calibration Memory Failure
(ECT) Engine Coolant Temperature - Low Temperature Indicated
(ECT) Engine Coolant Temperature - High Temperature Indicated
(TP) Throttle Position Sensor - Signal Voltage High
(TP) Throttle Position Sensor - Signal Voltage Low
(IAT) Intake Air Temperature - Low Temperature Indicated
(IAT) Intake Air Temperature - High Temperature Indicated
(MAP) Manifold Absolute Pressure - Signal Voltage High
Code34 (MAP) Manifold Absolute Pressure - Signal Voltage Low
(IC) Ignition Control - Open IC Circuit
(IC) Ignition Control - Grounded IC Circuit, Open or Grounded
Bypass
(KS) Knock Sensor - Continuous Knock Detected
(KS) Knock Sensor - No Knock Detected
(ECM) Calibration Memory Failure
(ECM) EEPROM Failure
SERVICE MANUAL NUMBER 23
Code Description
Code Description
90-861326--1 MARCH 1999