Fault Code Definition

After identifying malfunctioning component or system, refer to the 3.5L FAULT CODE DIAGNOSIS charts at the end of this article.

6-CYLINDER FAULT CODE IDENTIFICATION

Fault Code

Component/System

Designation

1 ⁽¹⁾

All Functions Normal

N/A

Fuel Rack Position Sensor

Airflow Sensor

B2/1

4 ⁽²⁾

EDS Control Unit

N39

5 ⁽³⁾

EGR Vacuum Transducer Or EGR Valve System

Y31/1

EDS Control Unit (Internal Power Supply)

N39

Starter Ring Gear Speed Sensor

Engine Coolant Sensor

B11/4

Intake Air Temperature Sensor

B2/1a

EDS Control Unit Power Supply

N39

11 ⁽⁴⁾

ELR Actuator

Y22

Or Boost Pressure Cut-Out Switchover Valve

Y31/6

Or EGR Vacuum Transducer

Y31/1

Not Used

EDS Control Unit Defective (Internal Memory)

N39

14 ⁽⁵⁾

EDS Pressure Sensor Defective

B5/1

Boost Pressure Control Vacuum Transducer Or Defect In Boost Pressure Control Circuit

Y31/4

⁽¹⁾	If no fault codes are displayed on pulse counter and driveability or customer complaints are present, perform functional test on ELR and EGR. See FUNCTIONAL TEST CHARTS at the end of this article.

⁽²⁾	EDS control unit atmospheric pressure sensor is malfunctioning. Atmospheric pressure sensor is internal to the EDS control unit.

⁽³⁾	Pulse counter will only display at 900 RPM for at least 5 seconds. Fault is not stored.

⁽⁴⁾	Pulse counter only displays fault code if a short circuit is present.

⁽⁵⁾	Pressure sensor is located in left rear corner of engine compartment, on firewall.