P0323 Code: Engine Speed Input Signal Intermittent
🟠 Moderate severity · drivable
Drivable, but the engine may cut out or stall when the signal drops, so replace the faulty part soon.
What P0323 means
The engine speed signal, usually from the crankshaft position sensor, is dropping in and out. This signal tells the computer how fast the engine is spinning so it can fire the spark and fuel at the right time. When the signal cuts out, the engine may stall or refuse to restart.
Symptoms
- Check engine light is on
- Engine cuts out or stalls
- Hard starting
- Rough running
Common causes
- most common: Loose or damaged wiring at the sensor connector
- common: Faulty crankshaft position sensor
- common: Corrosion at the connector
- less common: Damaged reluctor ring
How to fix it
| Fix | DIY? | Typical cost |
|---|---|---|
| Inspect and clean the sensor connector and wiring | Yes | $0–10 |
| Replace the crankshaft position sensor | Yes | $50–200 |
| Repair damaged sensor wiring | Mechanic | $50–200 |
Frequently asked questions
Can I drive with a P0323 code?
Yes, but the engine may stall suddenly when the signal drops. Fix it soon.
What is the most common cause of P0323?
Loose or damaged wiring at the sensor connector.
How much does it cost to fix a P0323?
Often nothing if it's just a loose connector; a new sensor runs about $50–$200.
Related codes
P0321
P0321 Code: Engine Speed Input Signal Out of Range
P0322P0322 Code: Engine Speed Input Signal Missing
P0339P0339 Code: Crankshaft Position Sensor A Circuit Intermittent
Updated 2026-08. This page is informational and not a substitute for professional diagnosis.