I have an intermittent problem...

When starting the car - the "no" ABS yellow light and no traction control yellow light comes on on the dash, and there are no lights on in either the heater-A/C readout (and thus neither the heat or A/C work) or the seat heater and traction control sections.

However, I went over a section of road covered in ice - I applied my brakes - and then the ABS kicked in - the "no" ABS yellow light in the dash went off and lights for the heater-A/C readout come one and the heater starts working - and everything then works until I turn the car off.

I have since replicated this several times - it always works the same.

Any ideas as to what is happening/wrong?

Thanks!

This is a 2002 Bonneville, right?

Sounds like a bad VSS to me.

Yes 2002 SSEi

Okay then yeah seems like a bad VSS to me.

The vehicle speed sensor would effect the heat/AC unit...?

It would affect the ABS and TC lights. I'd fix these first before working on the HVAC.

Why not scan the ABS module?

OK, some "new" information...

I keep going back and forth as to whether I want to put this kind of money into this car - but every time I drive it - I say, yeah I do!

So... there seems to be a problem with starting the car that is "linked" to how cold it is outside.

Every time I try to start the car and it is under 40 F or so - the car starts up NO problem.

However, if it is 40 F +, then I turn the key - nothing happens for a 2-3 seconds - then the Service Engine Soon light comes on and then after 2-3 seconds the red battery icon appears and the car dings 5 times - I turn the key and nothing...

I turn the key off - and start all over again - the Service Engine Soon light comes on after a few seconds, followed by the red battery icon after a few more seconds - then I turn the key and it may or may not start.

Sometimes it starts after 2 or 3 tries, sometimes it takes about 4 or 5+ tries.

But like I said, this ONLY happens when the outside temp is above 40 F or so - if the temp is lower than that - it starts off right away.

Help!

Scan ALL modules.

There are random misfire codes, lean codes, rich codes, cam codes, and evap codes present in the system:

$550 Possible ignition module

$375 Spark Plugs and Wires

$119 Fuel Induction Service

$300 Camshaft Position Sensor - $300.00 (May be more issues present)

$250 Purge Solenoid - $250.00 (May be more issues present in evap system)

?Rich/Lean codes would need further diagnostic after present issues are resolved