Mustang V8-302 5.0L COBRA (1995)
Code 451 - 460: Testing and Inspection
NOTE
KOEO refers to Key On Engine Off (KOEO)
KOER refers to Key On Engine Running (KOER)
DTC refers to Diagnostic Trouble Code (DTC)
DTCs should be diagnosed in the order they are received.
DTC 337
Exhaust gas recirculation valve position sensor circuit above maximum voltage.
KOEO Hard Code .................................................................................................................................................................................... Go to DN5
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Pinpoint Tests/DN - EGR Valve Position Sensor/EGR
Vacuum Regulator Solenoid/DN5 - Attempt to Generate DTC 327
KOER Hard Code .................................................................................................................................................................................... Go to DN5
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Pinpoint Tests/DN - EGR Valve Position Sensor/EGR
Vacuum Regulator Solenoid/DN5 - Attempt to Generate DTC 327
KOEO Memory Code ............................................................................................................................................................................ Go to DN90
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Pinpoint Tests/DN - EGR Valve Position Sensor/EGR
Vacuum Regulator Solenoid/DN90 - Check Intermittent Sensor
DTC 338
Engine coolant temperature lower than expected (thermostat test).
KOEO Memory Code ........................................................................................................................................................................... Go to DA100
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Pinpoint Tests/DA - Intake Air and Engine Coolant
Temperature Sensors/DA100 - Engine Too Cold
DTC 339
Engine coolant temperature higher than expected (thermostat test).
KOEO Memory Code ........................................................................................................................................................................... Go to DA101
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Pinpoint Tests/DA - Intake Air and Engine Coolant
Temperature Sensors/DA101 - Engine Too Hot
DTC 341
Octane adjust service pin open.
KOEO Hard Code ..................................................................................................................................................................................... Go to KP1
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Pinpoint Tests/KP - Octane Adjust/KP1 - Inspect Octane
Adjust Inline Connector
DTC 381
Frequent A/C clutch cycling.
KOEO Memory Code ............................................................................................................................................................................. Go to X130
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Pinpoint Tests/X - Constant Control Relay Module
(CCRM)/X130 - Check For Causes of Fast A/C Compressor Cycling
DTC 411
Cannot control RPM during KOER self-test low RPM check.
KOER Hard Code ................................................................................................................................................................................... Go to KE15
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Pinpoint Tests/KE - Idle Air Control Control
Solenoid/KE15 - Engine RPM Error During Self-Test
DTC 412
Cannot control RPM during KOER self-test high RPM check.
KOER Hard Code ..................................................................................................................................................................................... Go to KE1
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Pinpoint Tests/KE - Idle Air Control Control Solenoid/KE1
- Check For RPM Drop
DTC 415
