Possible causes – Dirty throttle body– Electric throttle control actuator misadjusted or damaged– Faulty Electric throttle control actuator– Intake air leak– Poor electrical connection to the Intake Air Control (IAC) valve Tech notes If there are no intake leaks, clean

Possible causes – EGR passage clogged– Faulty EGR Vacuum Modulator Valve– Faulty EGR Valve– Faulty EGR solenoid valve– EGR solenoid valve harness is open or shorted– EGR solenoid valve circuit poor electrical connection– Dead (Weak) battery– Faulty EGR temperature sensor

Possible causes – EGR volume control valve stuck open– Faulty EGR volume control valve– EGR solenoid valve harness is open or shorted– EGR solenoid valve circuit poor electrical connection– Faulty EGR temperature sensor and circuit Tech notes There is a

Possible causes – Faulty Engine Fuel Temperature Sensor– Engine Fuel Temperature Sensor harness is open or shorted– Engine Fuel Temperature Sensor circuit poor electrical connection When is the code detected? An excessively high voltage is sent to Powertrain Control Module

Possible causes – Faulty Fuel Level Sensor– Fuel Level Sensor harness is open or shorted– Fuel Level Sensor circuit poor electrical connection – Faulty combination meter Tech notes There is a factory service bulletin for the following Lincoln Models: 2003-2004

Possible causes – Faulty Ignition Coil 1– Ignition Coil 1 harness is open or shorted– Ignition Coil 1 circuit poor electrical connection– Faulty Powertrain Control Module (PCM) When is the code detected? Each ignition circuit is continuously monitored by the

Possible causes – Faulty Ignition Coil 2– Ignition Coil 2 harness is open or shorted– Ignition Coil 2 circuit poor electrical connection– Faulty Powertrain Control Module (PCM) When is the code detected? Each ignition circuit is continuously monitored by the

Possible causes – Faulty Ignition Coil 3– Ignition Coil 3 harness is open or shorted– Ignition Coil 3 circuit poor electrical connection– Faulty Powertrain Control Module (PCM) When is the code detected? Each ignition circuit is continuously monitored by the

Possible causes – Faulty Ignition Coil 4– Ignition Coil 4 harness is open or shorted– Ignition Coil 4 circuit poor electrical connection– Faulty Powertrain Control Module (PCM) When is the code detected? Each ignition circuit is continuously monitored by the

Possible causes – Faulty Ignition Coil 5– Ignition Coil 5 harness is open or shorted– Ignition Coil 5 circuit poor electrical connection– Faulty Powertrain Control Module (PCM) When is the code detected? Each ignition circuit is continuously monitored by the

Possible causes – Faulty Ignition Coil 6– Ignition Coil 6 harness is open or shorted– Ignition Coil 6 circuit poor electrical connection– Faulty Powertrain Control Module (PCM) When is the code detected? Each ignition circuit is continuously monitored by the

Possible causes – IACV-AAC valve harness is open or shorted– IACV-AAC valve poor electrical connection– Faulty IACV-AAC valve Tech notes There is a factory service bulletin for the following Lincoln Models: 2005-2007 Town Car2006 Mark LTLincoln Factory Service Bulletin OBDII

Possible causes – Differential Pressure Feedback Electronic Sensor harness is open or shorted– Differential Pressure Feedback Electronic Sensor circuit poor electrical connection– Faulty Differential Pressure Feedback Electronic Sensor Tech notes There is a factory service bulletin for the following Lincoln

Possible causes – Faulty Differential Pressure Feedback Electronic (DPFE) sensor– Differential Pressure Feedback Electronic (DPFE) sensor harness is open or shorted– Differential Pressure Feedback Electronic (DPFE) sensor circuit poor electrical connection Tech notes There is a factory service bulletin for

Possible causes – Foulty Throttle Body– Faulty Throttle Actuator Control Module– Throttle Actuator Control Module harness is open or shorted– Throttle Actuator Control Module circuit poor electrical connection– Faulty Powertrain Control Module (PCM) Symptoms – Engine Light ON (or Service

Possible causes – New PCM-Needs progranming– Incorrect VID configuration Tech notes After a new PCM has been installed, the Vehicle Identification (VID) block has to be program to the PCM. There is a service bulletin for the P1639 code for

Possible causes – Transmission temperature sensor harness is open or shorted– Transmission temperature sensor circuit poor electrical connection– Faulty transmission temperature sensor Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1783 LINCOLN Description Engine at operating temperature