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P0322
System
Powertrain (Ignition)
Scanner required
Enhanced OBD2 scanner (live data graphs, freeze frame, battery voltage test)

Ignition/Distributor Engine Speed Input Circuit No Signal

Understand P0322, common causes, and the right TOPDON scanner to diagnose it.

No ignition reference signal — engine may not start.

Common symptoms

  • No-start
  • Sudden stall while driving

Typical causes

  • Failed crank sensor
  • Broken distributor pickup
  • Open circuit in harness

What scanner do you need?

Enhanced OBD2 scanner (live data graphs, freeze frame, battery voltage test)

Use live data and freeze frame to confirm the fault before replacing parts. ABS, SRS, and network U-codes usually require a full-system scanner.

Diagnostic tips

  • Record freeze frame data when the code first sets
  • Clear the code only after fixing the root cause
  • Check for related pending codes that point to a common issue
  • Verify battery voltage is above 12.4V before chasing sensor codes

Recommended TOPDON scanners

Frequently asked questions

What does P0322 mean?
P0322 indicates ignition/distributor engine speed input circuit no signal. No ignition reference signal — engine may not start.
Can I diagnose P0322 with a basic code reader?
P0322 may set in the engine module, but related diagnostics often benefit from an enhanced or full-system scanner with live data and freeze frame.
Which TOPDON scanner do I need for P0322?
Enhanced OBD2 scanner (live data graphs, freeze frame, battery voltage test) See recommended tools on this page.
Is it safe to drive with P0322?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.