Dear Chris,

Good p.m. and may this find you well. I'm a little puzzled by your question, "Where is the AMM?" While I don't have a 940 with a turbo, I believe the AMM is next to the air intake box, connected to the throttle body by a 3"/75mm diameter corrugated rubber/plastic hose.

Before replacing the AMM:
(a) clean the electrical connectors
(b) clean the AMM itself.

In regard to (b) do NOT try to clean the filament with anything, other than a spray (pump or aerosol). That is, do NOT use a cotton swab or anything solid, that will make contact with the filament. This hair fine filament is easily broken. Clean the AMM filament with carb cleaner. Removal of dirt/carbon might restore it to smooth operation.

In regard to Code 214, if the RPM/Crank sensor signal goes away, your car will stop. The sensor's signal tells the fuel pump to continue working. If the sensor does not signal that the flywheel/flexplate is turning, the fuel pump shuts down. This is a safety feature: it keeps the fuel pump from sending fuel into an engine bay, wherein the engine is not turning (perhaps because of accident damage).

The RPM/Crank sensor sits atop the transmission bell housing, at the 10 o'clock position, as you face the engine (passenger side, US/Canada models). There is a procedure in the FAQs, under FEATURES, above, for chaning the RPM/Crank sensor.

If this sensor is the original, it does not owe you a nickel. They usually fail because the wiring harness deteriorates with time/heat, causing the wires the break and/or to short.

Hope this helps.

Yours faithfully,

spook