P0323 code meaning
Ignition/Distributor Engine Speed Input Circuit Intermittent
Powertrain system Generic code P03xx codes Check engine light
What P0323 means
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.
P0323 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 3 hours
- Clears after repairAfter a drive cycle
Symptoms of P0323
- Brief stumbling or stalling, then normal again
- Sporadic misfire
- Tachometer flickers
- Check engine light on
Common causes of P0323
- Most likelyLoose contact or corrosion at the sensor connector
- PossibleChafed wiring, break under vibration
- PossibleSensor dropping out when hot
- Less likelyInterference from neighbouring wires
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Crankshaft position sensorCrankshaft tone wheelSensor wiringEngine control module
What each part of P0323 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 3 | Area: ignition system or misfire. |
| 23 | The exact fault in that area. |
What to do next
- Note P0323 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P0323
What does P0323 mean?
P0323 means "Ignition/Distributor Engine Speed Input Circuit Intermittent". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with P0323?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P0323 fail an emissions test?
Yes, it can. P0323 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P0323 to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P0323 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.