Possible causes – Faulty Ignition Coil 7– Ignition Coil 7 harness is open or shorted– Ignition Coil 7 circuit poor electrical connection– Faulty Engine Control Module (ECM) When is the code detected? Each ignition circuit is continuously monitored by the

Possible causes – Faulty Ignition Coil 8– Ignition Coil 8 harness is open or shorted– Ignition Coil 8 circuit poor electrical connection– Faulty Engine Control Module (ECM) When is the code detected? Each ignition circuit is continuously monitored by the

Possible causes – Faulty Ignition Coil 9– Ignition Coil 9 harness is open or shorted– Ignition Coil 9 circuit poor electrical connection– Faulty Engine Control Module (ECM) When is the code detected? Each ignition circuit is continuously monitored by the

Possible causes – Faulty Ignition Coil Primary/Secondary– Ignition Coil Primary/Secondary harness is open or shorted– Ignition Coil Primary/Secondary circuit poor electrical connection– Faulty Engine Control Module (ECM) When is the code detected? The test fails when the Engine Control Module

Possible causes – Faulty Ignition/Distributor engine speed sensor– Faulty Crankshaft Position sensor– Ignition/Distributor engine speed sensor harness is open or shorted– Ignition/Distributor engine speed sensor circuit poor electrical connection– Low battery charge– Faulty Engine Control Module (ECM) When is the

Possible causes – Faulty Injector Control Pressure (ICP) sensor– EGR system fault– Engine mechanical condition– Low oil pressure– Faulty Turbo/Supercharger Tech notes There is a factory service bulletin for the following Ford models: 2003-2007 Ford F-Super Duty2004-2007 Ford E-350, E-4502003-2005

Possible causes – Faulty Intake Air Heater– Intake Air Heater harness is open or shorted– Intake Air Heater circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P0640 FORD Description The intake air (IA)

Possible causes – Faulty Intake Air Temperature (IAT) sensor– Dirty air filter– Intake Air Temperature (IAT) sensor harness is open or shorted– Intake Air Temperature (IAT) sensor circuit poor electrical connection When is the code detected? – An excessively high

Possible causes – Faulty Intake Air Temperature (IAT) sensor– Dirty air filter– Intake Air Temperature (IAT) sensor harness is open or shorted– Intake Air Temperature (IAT) sensor circuit poor electrical connection When is the code detected? An excessively low or

Possible causes – Faulty Intake Air Temperature (IAT) sensor– Dirty air filter– Intake Air Temperature (IAT) sensor harness is open or shorted– Intake Air Temperature (IAT) sensor circuit poor electrical connection When is the code detected? An excessively low voltage

Possible causes – Faulty Intake Air Temperature (IAT) sensor– Dirty air filter– Intake Air Temperature (IAT) sensor harness is open or shorted– Intake Air Temperature (IAT) sensor circuit poor electrical connection When is the code detected? The Engine Control Module

Possible causes – Faulty Intake Air Temperature (IAT) sensor– Intake Air Temperature (IAT) sensor harness is open or shorted– Intake Air Temperature (IAT) sensor electrical circuit poor connection Tech notes If the Intake Air Temperature (IAT) is part of the

Possible causes – Faulty Intake Air Temperature sensor– Intake Air Temperature sensor harness is open or shorted– Intake Air Temperature sensor circuit poor electrical connection When is the code detected? The Engine Control Module (ECM) has detected a high voltage

Possible causes – Faulty Intake Air Temperature sensor– Intake Air Temperature sensor harness is open or shorted– Intake Air Temperature sensor circuit poor electrical connection When is the code detected? The Engine Control Module (ECM) has detected a low voltage

Possible causes – Faulty Intake Air Temperature sensor– Intake Air Temperature sensor harness is open or shorted– Intake Air Temperature sensor circuit poor electrical connection When is the code detected? The Engine Control Module (ECM) has detected a performance fault

Possible causes – Faulty Intake Manifold Tuning Valve (IMTV)– Intake Manifold Tuning Valve harness is open or shorted– Intake Manifold Tuning Valve circuit poor electrical connection When is the code detected? The Engine Control Module (ECM) has detected a high

Possible causes – Faulty Intake Manifold Tuning Valve (IMTV)– Intake Manifold Tuning Valve harness is open or shorted– Intake Manifold Tuning Valve circuit poor electrical connection When is the code detected? The Engine Control Module (ECM) has detected a low

Possible causes – Faulty Intake Manifold Tuning Valve (IMTV)– Intake Manifold Tuning Valve harness is open or shorted– Intake Manifold Tuning Valve circuit poor electrical connection When is the code detected? The Engine Control Module (ECM) has detected an improper

Possible causes – Faulty Intake Manifold Tuning Valve (IMTV)– Intake Manifold Tuning Valve harness is open or shorted– Intake Manifold Tuning Valve circuit poor electrical connection When is the code detected? The Engine Control Module (ECM) has detected an improper

Possible causes – Faulty knock sensor– Knock sensor circuit poor electrical connection– Knock sensor harness is open or shorted– Faulty Engine Control Module (ECM) Tech notes The P0324 code means that the Knock Sensor is not working properly. Problems with