Powertrain, generic · Ignition system or misfire

P0322 Ignition/Distributor Engine Speed Input Circuit No Signal

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

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.

Likely causes

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

Symptoms

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

Repair estimate

DifficultyMediumDIY possible
Parts and labour€60–400
Time0.5–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

crankshaft position sensorcrankshaft tone wheelsensor wiringengine control module

Related codes

P0320P0321P0323P0335P2106

References: fordservicecontent.com, newtonnet.co.uk, saabwisonline.com, law.cornell.edu.