Briefly looking through the 2 lists below, there would not "appear" :-/ to be any reason why the two cant be merged into a complete set as in the obdII list, for 2.2/2.6/3.2, as this??? http://www.obd-codes.com/trouble_codes/
Apart from the obvious third of an engine missing of course, but i don't see how that can cause a mix up...?
Does such a list exist, for 2 (3) digit codes , or what ever they are called, and would that make life easier for all?(not admin probably) as opposed to a separate list for each engine? Or was it the case, that there is a complete list, and the relevant codes have been separated for each engine? Including tractors?
we did seem to have a bit of a mix up with this on a previous thread, wondered if it would be easier just to have 2 lists if possible,one for 2 digit and one for 4 digit, and be done with it....

? :-/
Just seeking clarification, that's all really

2.0 16v list
12 Initiation of diagnosis. n/a
13 Oxygen sensor Open circuit
14 Coolant temperature sensor Voltage low
15 Coolant temperature sensor Voltage high
16 Knock sensor signal circuit No change in voltage
19 Incorrect Revs per Minute (RPM) signal (crankshaft sensor) Incorrect signal, check sensor
21 Throttle position sensor (TPS) Voltage high
22 Throttle position sensor (TPS) Voltage low
23 Knock control module signal Out of range
24 Vehicle speed signal (VSS) No signal
25 Injector valve 1 Voltage high
26 Injector valve 2 Voltage high
27 Injector valve 3 Voltage high
28 Injector valve 4 Voltage high
37 Check light (fault code lamp) Voltage low
38 Oxygen sensor circuit Voltage high
39 Oxygen sensor circuit Voltage low
44 Oxygen sensor Lean exhaust (weak mixture)
45 Oxygen sensor Rich exhaust (rich mixture)
48 Battery Voltage low
49 Battery Voltage high
52 Check light (fault code lamp) Voltage high
53 Fuel pump relay Voltage low
54 Fuel pump relay Voltage high
55 Engine Control Unit (ECU) faulty Check chassis earth and ECU connector.
56 Idle air control Voltage high
57 Idle air control Voltage low
61 Fuel tank vent valve Voltage low
62 Fuel tank vent valve Voltage high
69 Intake air temperature sensor Voltage low
71 Intake air temperature sensor Voltage high
73 Mass air flow temperature Voltage low
74 Mass air flow temperature Voltage high
75 Torque control (automatic) Voltage low
76 Torque control (automatic) Continuous signal, ignition retard long
81 Injector valve 1 Voltage low. Injector short circuit to ground.
82 Injector valve 2 Voltage low. Injector short circuit to ground.
83 Injector valve 3 Voltage low. Injector short circuit to ground.
84 Injector valve 4 Voltage low. Injector short circuit to ground.
87 Air Conditioning (A/C) cut-off relay Voltage low
88 Air Conditioning (A/C) cut-off relay Voltage high
91 Oxygen sensor heater Voltage high
92 Camshaft sensor Incorrect signal
98 Oxygen sensor heater Voltage low, open circuit
2.5/3.0 v6
10 Variant-Coding Not Programmed
13 O2 Sensor 1 Open Circuit
14 Coolant Temperature Voltage Low
15 Coolant Temperature Voltage High
16 Knock Signal Circuit 1
17 Knock Signal Circuit 2
18 Knock Control Module; Replace Electronic Control Unit (ECU)
19 Incorrect RPM Signal
21 Throttle Position Sensor (TPS) Voltage High
22 Throttle Position Sensor (TPS) Voltage Low
25 Injector Valve 1 Voltage High
26 Injector Valve 2 Voltage High
27 Injector Valve 3 Voltage High
28 Injector Valve 4 Voltage High
29 Injector Valve 5 Voltage High
31 No Engine RPM Signal
32 Injector Valve 6 Voltage High
33 Exhaust Gas Recirculation (EGR) Valve Voltage Low
34 Exhaust Gas Recirculation (EGR) Valve Voltage High
38 O2 Sensor 1 Circuit Voltage Low
39 O2 Sensor 1 Circuit Voltage High
44 O2 Sensor 1 Lean Exhaust
45 O2 Sensor 1 Rich Exhaust
46 Secondary Air Pump Voltage Low
47 Secondary Air Pump Voltage High
48 Battery Voltage Low
49 Battery Voltage High
52 Telltale (Check Light) Voltage High
53 Fuel Pump Relay Voltage Low
54 Fuel Pump Relay Voltage High
55 Replace Electronic Control Unit (ECU)
56 Idle Air Control Voltage High
57 Idle Air Control Voltage Low
59 Intake Manifold Valve 1 Voltage Low
61 Fuel Tank Ventilation Valve Voltage Low
62 Fuel Tank Ventilation Valve Voltage High
63 Intake Manifold Valve 1 Voltage High
69 Intake Air Temperature Voltage Low
71 Intake Air Temperature Voltage High
73 Mass Air Flow Sensor Voltage Low
74 Mass Air Flow Sensor Voltage High
75 Torque Control Voltage Low
76 Continuous Torque Control
81 Injector Valve 1 Voltage Low
82 Injector Valve 2 Voltage Low
83 Injector Valve 3 Voltage Low
84 Injector Valve 4 Voltage Low
85 Injector Valve 5 Voltage Low
86 Injector Valve 6 Voltage Low
87 A/C Cutoff Relay Voltage Low
88 A/C Cutoff Relay Voltage High
89 O2 Sensor 2 Open Circuit
91 O2 Sensor 2 Circuit Voltage High
93 Hall Sensor Voltage Low
94 Hall Sensor Voltage High
98 O2 Sensor 2 Circuit Voltage Low
121 O2 Sensor 2 Lean Exhaust
122 O2 Sensor 2 Rich Exhaust
123 Intake Manifold Valve 1 Blocked
124 Intake Manifold Valve 2 Blocked
127 Camshaft Control Voltage Low
128 Camshaft Control Voltage High
129 Exhaust Gas Recirculation (EGR) Valve Feedback Voltage Low
131 Exhaust Gas Recirculation (EGR) Valve Feedback Voltage High
132 Exhaust Gas Recirculation (EGR) Valve Feedback Incorrect Signal
133 Intake Manifold Valve 2 Voltage Low
134 Intake Manifold Valve 2 Voltage High
135 Telltale (Checklight) Voltage Low
136 Unknown Output Driver Error
137 Electronic Control Unit (ECU) Box Temperature High
141 Secondary Air Pump Not Enough Air
142 Secondary Air Pump Air Without Pump
143 Immobiliser No Or Wrong Signal
144 Immobiliser No Signal
145 Immobiliser Wrong Signal