Mustang V8-302 5.0L COBRA (1995)
Code 321 - 330: 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 327
Exhaust gas recirculation valve sensor circuit below minimum voltage.
KOEO Hard Code .................................................................................................................................................................................... Go to DN1
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Pinpoint Tests/DN - EGR Valve Position Sensor/EGR
Vacuum Regulator Solenoid/DN1 - Attempt to Generate DTC 337
KOER Hard Code .................................................................................................................................................................................... Go to DN1
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Pinpoint Tests/DN - EGR Valve Position Sensor/EGR
Vacuum Regulator Solenoid/DN1 - Attempt to Generate DTC 337
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 328
Exhaust gas recirculation valve position sensor closed voltage lower than expected.
KOEO Hard Code .................................................................................................................................................................................. Go to DN25
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Pinpoint Tests/DN - EGR Valve Position Sensor/EGR
Vacuum Regulator Solenoid/DN25 - Check EVP Sensor and EGR Valve Operation
KOER Hard Code .................................................................................................................................................................................. Go to DN25
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Pinpoint Tests/DN - EGR Valve Position Sensor/EGR
Vacuum Regulator Solenoid/DN25 - Check EVP Sensor and EGR Valve Operation
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 332
Insufficient exhaust gas recirculation flow detected.
KOER Hard Code .................................................................................................................................................................................. Go to DN40
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Pinpoint Tests/DN - EGR Valve Position Sensor/EGR
Vacuum Regulator Solenoid/DN40 - Verify Vacuum is Present at EGR Valve
KOEO Memory Code ......................................................................................................................................................................... Go to DN110
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Pinpoint Tests/DN - EGR Valve Position Sensor/EGR
Vacuum Regulator Solenoid/DN110 - Check EGR Valve Function
DTC 334
Exhaust gas recirculation valve position sensor closed voltage higher than expected.
KOEO Hard Code .................................................................................................................................................................................. Go to DN20
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Pinpoint Tests/DN - EGR Valve Position Sensor/EGR
Vacuum Regulator Solenoid/DN20 - Check For DTC 558
KOER Hard Code .................................................................................................................................................................................. Go to DN20
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Pinpoint Tests/DN - EGR Valve Position Sensor/EGR
Vacuum Regulator Solenoid/DN20 - Check For DTC 558
KOEO Memory Code .......................................................................................................................................................................... Go to DN115
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Pinpoint Tests/DN - EGR Valve Position Sensor/EGR
Vacuum Regulator Solenoid/DN115 - Check EGR Vacuum w/Engine Running
DTC 335
Exhaust gas recirculation valve pressure sensor voltage higher or lower than expected during KOEO self-test.
