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Ignition/Distributor Engine Speed Input Circuit No Signal

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What P0322 means

Severity not yet assessed

The control unit reports “Ignition/Distributor Engine Speed Input Circuit No Signal”. Code P0322 identifies the area to investigate, but it does not prove that one named part has failed without a confirming test and vehicle context.

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General information, not a diagnosis or repair instruction. Always confirm with a qualified mechanic for your specific vehicle.

Treat the crankshaft position sensor as the area to investigate first, not the part to replace first.

What this code does not prove

The crankshaft position sensor being named in this code is a symptom report, not a parts verdict. Multiple causes can share the same code, so separating them needs a test.

Where the diagnosis usually goes next

Check the signal at its source

The area P0322 identifies is the crankshaft position sensor, where the control unit is not receiving a usable signal at all. A confirming test still has to name the actual cause.

How to tell the paths apart: Read the live data and compare it against the expected range for current conditions before replacing anything.

Rule out wiring and the connector

Codes of this shape often come from damaged wiring, a corroded connector, or a poor ground on the crankshaft position sensor — not the component itself.

How to tell the paths apart: Inspect the wiring and connector for the crankshaft position sensor for damage and a secure ground before replacing anything.

Before you drive on

A single code naming the crankshaft position sensor does not decide this vehicle's fate on its own. Normal running means limited, diagnosis-only use; any worsening changes that immediately.

Stop and arrange a check if

  • the engine is misfiring, losing power, or stalling
  • smoke, a fuel/burning smell, or overheating appears
  • the crankshaft position sensor's behaviour is clearly getting worse rather than staying stable

Before authorising a repair

  • Bring the complete code list and freeze-frame data relevant to the crankshaft position sensor
  • Ask for the test that confirms a fault in the crankshaft position sensor — not just the code alone

What to check first

  1. Check what the crankshaft position sensor is actually reporting right now against the range expected for current conditions.
  2. Inspect the wiring, connector, and ground for the crankshaft position sensor before replacing the component.
  3. A crankshaft position sensor produces a consistent, evenly-timed pulse pattern throughout cranking and running, with one identifiable reference gap per revolution. A pattern that drops out intermittently, especially when hot or under vibration, points to the sensor's air gap, a damaged tone wheel, or a wiring/connector fault rather than an intermittent ignition or fuel problem elsewhere — reproducing the dropout while watching the raw sensor waveform is the standard way to confirm it.
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Frequently asked questions

Does this code tell me the crankshaft position sensor has failed?

No. It points to the crankshaft position sensor; the cause still needs to be confirmed by a measurement or targeted test.

What should I bring to the workshop?

The complete code list, freeze-frame data, and the conditions around the crankshaft position sensor — that gives the technician context, not a guess.

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