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HOLDEN COMMODORE VS 5.0L V8 (VU Eng.) 1993-97

Fault Codes
The PCM incorporates a Self Diagnostic Function which detects System Malfunctions.

It indicates the presence of a Fault via the Malfunction Indicator Light (MIL).

This is located in the Instrument Cluster.
(Formerly referred to as the Check Engine Light)

System Malfunctions fall into Two Categories.

1. Hard Faults

Indicated by the MIL being illuminated whenever the Engine is running.

2. Intermittent Faults.

Cause the MIL to be illuminated while the Fault is present.
The MIL will go out approximately Ten Seconds after the Fault disappears.

Faults of Either Type will cause a Fault Code to be stored in Memory.

Some Fault Codes do NOT illuminate the MIL.
(Indicated in the Fault Code Table)

All Fault Codes consist of Two Digits.
If NO Fault Codes are stored in Memory:

A Code 12 will be displayed.

This consists of;
One Flash of the MIL.
Followed by a 1.2 Second Pause.
Two Flashes of the MIL.
Followed by a Longer Pause.

The Code is then repeated.
If more than One Fault Code is stored in Memory:
The Code with the Lowest Numerical Value will be displayed Three Times.

The Code with the Next Higher Numerical Value will be displayed Three Times.

Fault Code Extraction To enter Diagnostic Mode:

Join Terminal 5 and Terminal 6 on the Diagnostic Connector.
Turn the Ignition Switch ON.
The Fault Codes will be displayed on the MIL.
Fault Code Table
Code # Circuit and Status

12* No RPM Signal
(OK Stationary Engine)
13 No Oxygen Sensor Signal
14 ECT Sensor Voltage Low -auto trans code
15 ECT Sensor Voltage High -auto trans code
16* ECT Sensor Voltage Unsteady
17* PCM Error
19 TPS Stuck Open
21 TPS Voltage High -auto trans code
22 TPS Voltage Low -auto trans code
23* IAT Voltage High
24 No Vehicle Speed Sensor -auto trans code
25* IAT Voltage Low
26* IAT Voltage Unstable
28 Pressure Switch Assembly Short Circuit -auto trans code
31 Theft Deterrent Signal Missing
33 MAP Signal Voltage High
34 MAP Signal Voltage Low
35* Idle Speed Error
36* Vacuum Leak
41 EST Output Circuit Failure
42 Ignition Bypass Circuit Failure
43* Knock Sensor Fault
44 Exhaust Lean Indication
45 Exhaust Rich Indication
47* 18X Reference Signal Missing.
48* Crankshaft Reference Signal Missing
49* Crank Signal Intermittent
51 PROM Error
52 System Voltage High -auto trans code
16 Volts for 109 Minutes
53 System Voltage High -auto trans code
19.5 Volts for 2 Seconds
54 System Voltage Unstable
55 Analogue to Digital Error -auto trans code
56* Running Lean Under Load
57 Injector Voltage Monitor Fault
58* Transmission Fluid Temperature -auto trans code
Voltage Low
59 Transmission Fluid Temperature -auto trans code
Voltage High
66 3-2 Shift Control Solenoid Circuit Fault -auto trans code
67 TCC ON-OFF Solenoid Control Circuit
-auto trans code
68 Transmission Component Slipping -auto trans code
69* TCC Stuck ON -auto trans code
72 Vehicle Speed Sensor
Intermittent While Driving
73 Pressure Control Solenoid Current -auto trans code
75 System Voltage Low -auto trans code
79 Transmission Fluid Temperature -auto trans code
Too High
81 2-3 Shift Solenoid “B” Fault -auto trans code
82 1-2 Shift Solenoid “A” Fault -auto trans code
83* TCC PWM Solenoid Fault -auto trans code

Diagnostic Connector
The Diagnostic Connector is located under the Dashboard
beneath the Steering Column.