P0322

Ignition/Distributor Engine Speed Input Circuit No Signal

Q: Is it safe to drive with P0322?

Not really — losing the engine-speed signal can cause a sudden stall or prevent the engine from starting. Address it promptly.

Q: Can I just clear P0322?

You can, but if the signal is genuinely dropping out the code returns and the engine may stall until it's fixed.

Ignition / engine speed input Generic OBD-II High

What it means

P0322 means the engine computer is getting no signal from the ignition/distributor engine-speed (RPM) input circuit. The ECM relies on this signal to time spark and fuel, so a lost signal can cause hard starting, stalling, or a no-start until the sensor or its wiring is repaired.

High

Can I keep driving? Risky — the ECM may lose the RPM signal it needs for spark and fuel timing, which can cause stalling or a no-start; have it repaired before relying on the vehicle.

Real-world scan data

Seen in

177

scans in the past year

Found in

<0.1%

of scans

0.1%

of scans that found faults

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

Common symptoms

What you'll notice

Check-engine light on
Hard starting, stalling, or a no-start
Engine misfires or runs erratically
Tachometer reading erratically or dropping to zero

Common causes

Most likely first

Faulty engine speed / RPM (distributor or crank) sensorLikely
Damaged wiring or a poor connector in the signal circuitCommon
Loose or corroded electrical connections or groundCommon
Failed ignition or distributor moduleLess often

How to diagnose & fix

Work through it in order

Read freeze-frame data and inspect the speed-sensor connector and wiring for damage or corrosion.
Check the sensor's air gap and mounting, and test its signal output while cranking.
Verify continuity, power, and ground on the signal circuit back to the module/ECM.
Replace the engine speed sensor or ignition/distributor module if testing confirms it. Clear and re-test.

FAQ

Quick answers

Is it safe to drive with P0322?+

Not really — losing the engine-speed signal can cause a sudden stall or prevent the engine from starting. Address it promptly.

Can I just clear P0322?+

You can, but if the signal is genuinely dropping out the code returns and the engine may stall until it's fixed.

Read & clear P0322 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX