Originally Posted by
deathrider666
..... and then saying "communication error", codes are pwm, vpw, can, kwp iso, kwp5bps and kwpaddr.
These are all different methods of communicating under the EOBD/OBD2 regulations.
The "kwp .." ones were used before there was can. As of 2008 can is the only allowed protocol.
The reason for the message "Transmission failure" and the non-communication problem could also be a defective can-bus.