Or 02 sensor,
Look under the steering column there's 2 sets of plugs green & black, connect the black pair (bit rusty could be the green ones can't remember) together and turn ignition on to 1st stage the engine management light will blink out any stored codes, long ones are multiples of 10 and short ones are aingles, so if it has three long flashes followed by 2 short ones would be code 32
It will cycle through any stored codes then stop for 2 seconds before repeating. If it's a steady constant flash then no stored codes
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