Vauxhall Workshop Service and Repair Manuals

Trouble Code Table, 20 NEJ  

Trouble code	Information sensor	Cause of fault
14	Coolant temperature sensor	Voltage low
15	Coolant temperature sensor	Voltage high
16	Knock sensor	No signal
18	Knock control module	Control unit defective
19	Crankshaft pulse pick-up	Incorrect engine speed signal
21	Throttle valve potentiometer	Voltage high
22	Throttle valve potentiometer	Voltage low
25	Injector 1	Voltage high
26	Injector 2	Voltage high
27	Injector 3	Voltage high
28	Injector 4	Voltage high
31	Crankshaft pulse pick-up	No engine speed signal
33	Exhaust gas recirculation valve	Voltage low
34	Exhaust gas recirculation valve	Voltage high
48	Battery	Voltage low
49	Battery	Voltage high
52	Engine telltale	Voltage high
53	Fuel pump relay	Voltage low
54	Fuel pump relay	Voltage high
55	Control unit	Defective

Notice: 

The terms "information sensor" and "cause of fault" in the trouble code table merely give an indication on the cause of the fault; i.e. when a trouble code is indicated, the component specified in the trouble code table is not necessarily at fault. The connection leads, plug connections and voltage supply must also be considered as alternative causes of the fault.  

2.3.6   Trouble Code Table, 20 NEJ (continued)  

Trouble code	Information sensor	Cause of fault
56	Idle air regulator	Voltage low
57	Idle air regulator	Voltage high
61	Tank vent valve	Voltage low
62	Tank vent valve	Voltage high
69	Intake air temperature sensor	Voltage low
71	Intake air temperature sensor	Voltage high
73	Hot film mass air flow meter	Voltage low
74	Hot film mass air flow meter	Voltage high
75	Torque control	Voltage low
76	Torque control	Voltage high
81	Injector 1	Voltage low
82	Injector 2	Voltage low
83	Injector 3	Voltage low
84	Injector 4	Voltage low
87	AC relay	Voltage low
88	AC relay	Voltage high
93	Hall sensor	Voltage low
94	Hall sensor	Voltage high
135	Engine telltale	Voltage low
136	Control unit	Defective