P0320 — Ignition/Distributor Engine Speed Input Circuit Malfunction
Category: Powertrain Severity: High
Updated:
DTC code P0320 means: Ignition/Distributor Engine Speed Input Circuit Malfunction. It falls under the "Powertrain" category, with an estimated severity of High. Common causes include failed crankshaft or distributor sensor, damaged reluctor wheel and damaged sensor wiring; it's worth confirming the diagnosis before replacing parts.
Possible causes
- Failed crankshaft or distributor sensor
- Damaged reluctor wheel
- Damaged sensor wiring
- Incorrect sensor air gap
Symptoms
- Engine won't start
- Sudden stalling
- Tachometer dropping to zero
How to diagnose it step by step
- Watch rpm on the scan tool while cranking.
- Check connector and wiring.
- Test the sensor.
- Replace the sensor.
How to fix it
Check the engine speed sensor signal with an oscilloscope or by measuring its resistance. Also make sure the connector is free of oil.
Estimated repair cost
Sensor: $30–150; $80–250 installed.
Frequently asked questions
What does DTC code P0320 mean?
Ignition/Distributor Engine Speed Input Circuit Malfunction.
Is code P0320 serious?
Severity High. Have it checked as soon as possible, especially if it affects safety or the catalytic converter.
Can I keep driving with code P0320?
Not reliable: it can leave you stranded.
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