Electronic Malfunction light

[JMaro4321]

Hello all- I have a 2001 RD and have an "electronic malfunction" light that comes on once every two weeks for a minute and a half then goes away-any ideas anyone? and can anyone recommend a good scanner for this year truck- not looking to spend a lot on the scanner...Thanks everyone in advance...john

[Aletasman]

I have a OTC heavy duty code reader and it works good.  It comes with a 6 and 9 pin connector. I dont know about an RD's but it works for ch, CV and cl models around that year