The fault codes reported by the 14CUX are fairly limited - most of them will relate to poor running rather then non starting. Although a fault code 29 would probably cause a failure to start. Note that if you have a red key, and turn it to 'off' it will lose any stored codes from memory, so best to leave the red key 'on' until you read the codes. If you want a code reader ithe most cost effective solution is Rovergauge software and a usb/serial cable for your PC,
http://www.remap-14cux.uk/gadgets.html Note that the serial protocol is a bit unusual so you can't use a normal RS232 type adapter. Also you do need a plug to fit into the code reader socket. To buy a cable ready made search for '
Range Rover Classic, TVR, Morgan, Lucas 14CUX "hotwire" diagnostic cable kit.' on ebay
FAULT CODE FAULT DESCRIPTION
12 mass airflow sensor
14 engine coolant temp sender
15 engine fuel temp sensor
17 Throttle position sensor. Sensors are checked with a
standard ultimeter: they are variable resistors
18 high throttle positition vs. low mass airflow readings
19 low throttle position reading vs. a high mass airflow readout
21 tune select resistor fault
23 fuel supply fault
28 engine air leak
29 ECM memory fault (if code 29 is showing any other codes are unreliable and must be ignored).
34 left bank injector fault
36 right bank injector fault
40 left bank misfire
44 left bank headed O2 sensor fault
45 right bank heated O2 sensor fault
48 idle air control valve fault
50 right bank misfire
59 combine codes 23 and 28
68 speed signal imput fault
69 neutral safety switch fault
88 canister purge valve leak
