Hi, I have a 2007 Mazda6 that has an ongoing problem. When it's symptomatic, the following happens when I start my car:

• Sometimes, when I start it up, the following lights come on:
  • Battery
  • Brake
  • AT
  • ABS
  • Check engine (is always on so not sure if it's special)
• When I shift it out of park and into reverse, it lurches
• Then it can drive, but:
  • The speedometer and RPM needles stay at zero
  • Sometimes it feels a little lurchy
  • Sometimes the brake feels a little ABS-y
• Then it fixes itself
  • The needles "flicker" (go up and down again several times)
  • The bad lights go off but the skid light comes on
  • Then the skid lights go off and the needles are normal
• August only:
  • After it had been fine for three months, the problem happened again when I hit a bump
  • Previously it had only been on startup but this time it happened mid-ride
  • I think once it also started bad but fixed itself on a bump

Most of the time it's fine on start-up. This happens occasionally. A mechanic at at transmission place replaced the Transmission Control Module. Then the problem came back. Any ideas of what needs to be done?

Thanks a lot!

 

Sound very much like power or earth connections. Loose/corroded earth points. Loose battery terminals, loose/corroded fuses.