Fault Code Definition

After identifying malfunctioning component or system, refer to appropriate diagnostic charts under DIAGNOSTIC TESTS in this article.

5-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

Voltage Supply

N/A

11 ⁽⁴⁾

ELR Actuator

Y22

Or EGR Vacuum Transducer

Y31/1

Not Used

EDS Control Unit Defective (Internal Memory)

N39

Air Pressure Sensor

B5/1

Boost Pressure Control/Pressure Control Flap Vacuum Transducer Or Boost Pressure Control Circuit

Y31/5

⁽¹⁾	If no fault codes are displayed on pulse counter and driveability or customer complaints are present, perform functional test on ELR, EGR, and P-2 control. 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 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.