Last week my 1999 2.7L went into limp mode and the P700 came up, once I got the car home took to my mechanic who replaced both speed sensors (everything went back to normal - gears, speedo, tach rest of gauges)
Drove car since and all fine with everything and power etc......
Today I went to start up car and had no power and could not start first thought battery was dead so put on charge - kept dyeing, keep charging.....
Finally gave the car a boost and all came to life but now my odometer reads "No Bus" and I have nothing showing in any of the clusters?
If it suddenly can't start on its own, I'm thinking your battery might be shot. It might not have enough power to fully run the pcm so your car went into kind of a limp-home mode. That's my best guess anyway. I'd put in a new battery and see if that fixes it.
Hopefully Joe is right and it is just sloppy/low system voltage that is creating problems for the computers. All the various computers (PCM, TCM, ABS control module, Air bag sontrol module, ATC head, etc.) communicate over the PCI bus. Hopefully you can get it all working by replacing the battery. If not, somethings shorting out the single-wire PCI bus.
Besides battery, it could be poor power system connection, so check for corrosion and poor connections at the battery posts and at the two jump posts.
You had no gauges because the gauges and odometer all get their information through the PCI bus. If you get clickclickclickclick when you turn the key to start, that means the starter isn't getting nearly enough power - either a bad connection or a dead battery.
Yes that is correct - all was fixed and the speed sensors corrected the fault light and the P700 error plus took it out of limp mode... Worked great for a solid week
Even went out yesterday and all fine started up fine numerous times and no issues this just happened today ---- Went outside to go out and nothing the car would not start and the instruments were also showing fine but after I boosted it and it fired up thats when the No Bus came on and the cluster died
Im afraid I do not have a volt meter with me, and I charged it on 10 amps for 3 hours or until the charger said it was charged. I did notice when I fired it up the volt meter on the charger dropped to 6 volts.
Tomorrow I will boost it and run it down to mechanic and get the load test done, then will report back the cause.
Im truly hoping it is just the battery and not a PCI issue
...I did notice when I fired it up the volt meter on the charger dropped to 6 volts...
That is either a *very* weak/sick battery or (if you didn't measure right on the battery posts) could be due to poor connection (such as heavy corrosion at battery connections, or loose terminal). You get much less than 10 volts when starting and you're done.