P0323 — Ignition/Distributor Engine Speed Input Circuit No Signal
Drivable short-term, but fix now to avoid damage.
What P0323 means
This code means the computer expected an engine speed signal from the ignition or distributor sensor but received nothing at all. It typically points to a completely failed sensor, a broken wire, or a disconnected connector. The repair usually involves replacing the sensor or distributor pickup and repairing the open circuit in the wiring.
Common symptoms
- Check engine light is on
- Engine won't start
- Engine stalls and won't restart
- Tachometer stays at zero while cranking
- Sudden loss of power while driving
Common causes
- Completely failed distributor or speed sensor
- Broken or open wiring to the sensor
- Disconnected or corroded connector
- Failed distributor pickup coil
- Engine control module fault
Typical repair cost
$150 – $500
Varies by vehicle and root cause.
Frequently asked questions
Can I keep driving with a P0323 code?
No, you really shouldn't. With no engine speed signal, the car often won't start or will stall unexpectedly. Get it towed or repaired right away rather than risk being stranded.
How much does it cost to fix a P0323 code?
Expect roughly $150 to $500. A failed sensor is cheaper to replace, but distributor replacement or extensive wiring repair raises the cost.
Is a P0323 code serious?
Yes. It usually means the engine has lost a critical signal and may not run at all. It needs prompt attention to get the vehicle reliably starting and running again.
Why won't my car start with a P0323 code?
The computer uses the RPM signal to control spark and fuel timing. With no signal at all, it can't fire the engine properly, so the car often cranks but won't start.