P0322: Ignition/Distributor Engine Speed Input Circuit No Signal

What does P0322 mean?

P0322 means the speed and reference input of the ignition – today the crankshaft position sensor – delivers no signal although the engine is turning. Ford proves the rotation with the camshaft sensor: if it shows more than one engine revolution without a crank signal (from 500 rpm, detected within 5 s), Ford sets P0322 or, depending on the engine, P0335; with electronic throttle the throttle software adds P2106 and goes into limp mode. Without a crank signal there is no ignition or injection, so the engine stalls or does not start. Saab's Motronic 2.8.1 (900 V6) sets P0322 when the engine fails to start; its inductive sensor should measure 500–600 Ω and give 2–5 V AC while cranking. Systems without a camshaft-based check may store no code at all on a total failure.

The code tells you which monitor failed, not which part is broken. Test before replacing parts.

Symptoms

• Engine cranks but does not start
• Engine stalls while driving
• Tachometer shows zero
• Check engine light on, with electronic throttle limp mode (P2106)

Common causes

• High Crankshaft position sensor failed (often heat-related)
• High Open or short in signal, ground or 5 V supply, corroded connector
• Medium Sensor loose, air gap too large or tone wheel damaged
• Low 5 V reference pulled down by another sensor on the same supply
• Low Engine module

Likelihood is a general estimate across vehicles; your make and model may differ.