Fails Smog (OBD not communicating)
#61
01-17-2017, 01:15 AM
Veteran Member
Hi XJPurr- Have you cleared your smog test? I have a similar problem with my '04 VDP. Had a P0174 code that was repaired/cleared with a new motor mount. After erasing all codes and driving about 200 miles, all readiness codes were OK'd EXCEPT the comp com readiness. I have driven about another 1200 miles and still not cleared. The Jaguar drive cycle says, "To avoid unnecessary complexity, a single comprehensive engine management drive cycle has not been developed for XJ range. Refer to the individual DTC for specific drive cycle/monitoring conditions". WTH. I don't have any DTC's (now).
Anybody have any suggestions?
The car has about 125,000 mi. on it, and has always passed smog easily. Every (2) smog station says "drive it". What criteria will clear the final "code"?
Thanks
Anybody have any suggestions?
The car has about 125,000 mi. on it, and has always passed smog easily. Every (2) smog station says "drive it". What criteria will clear the final "code"?
Thanks
Sometimes peering at live data / checking pending codes / looking at what recent codes (or work done) provides clues.
Bear in mind smog places do not know very much about your car so drive it is their uninformed guess.
#62
01-17-2017, 10:20 AM
Member
#63
01-20-2017, 05:39 PM
If your Comp Com is not setting after 1200 miles it could be one of the computers on your car is detecting a malfunction but is not setting a code, which would mean some serious troubleshooting is needed and that is best done at a Jag dealer such as Galpin or Cerritos Jag.