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Ignition/Distributor Engine Speed Input Circuit Intermittent

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What P0323 means

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The control unit reports “Ignition/Distributor Engine Speed Input Circuit Intermittent”. Code P0323 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.

When a warning involves the crankshaft position sensor, the order of checks matters more than the parts list.

What this code does not prove

This code describes a system observation about the crankshaft position sensor, not a verdict that one named part has failed. The same code can have more than one cause, so the paths must be separated by testing.

Where the diagnosis usually goes next

Check the signal at its source

Code P0323 describes a condition in the crankshaft position sensor: the signal drops out or changes unexpectedly rather than failing in one fixed way. That names where to look, but it does not by itself confirm which part has failed.

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 code about the crankshaft position sensor alone cannot give a universal verdict for this specific vehicle. If the car is running normally, limit use to what is needed for diagnosis; any change in behaviour changes the decision.

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. Read live data for the crankshaft position sensor and compare it against the expected range for current engine 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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