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