P0323Ignition/Distributor Engine Speed Input Circuit Intermittent
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P0323 stands for a speed and reference signal at the ignition input – today the crankshaft position sensor – that drops out or is disturbed for moments and then recovers. None of the manufacturer documents available to us (GM 2014–2019, Ford 2012 and 2020–2023, Saab workshop information) uses P0323; the sporadic crank sensor check runs under P0339 at Ford and under P0336 at GM. Ford's logic shows what is evaluated: teeth missing or extra for a moment and the reference gap appearing at an unexpected position, after which the module briefly cuts fuel and spark and resynchronises. Typical causes are a loose contact, chafed wiring and electrical interference. The code itself is described only by its J2012 name and CARB's monitoring requirement for crank angle sensors.
- What you may notice
- Brief stumbling or stalling, then normal again
- Sporadic misfire
- Tachometer flickers
- Check engine light on
- Likely causes
- LikelyLoose contact or corrosion at the sensor connector
- PossibleChafed wiring, break under vibration
- PossibleSensor dropping out when hot
- RareInterference from neighbouring wires
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €40 – €300
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.