P0322 critical

Ignition/Distributor Engine Speed Input Circuit No Signal

The P0322 code means the vehicle's onboard diagnostic system has detected: Ignition/Distributor Engine Speed Input Circuit No Signal. This is a critical severity code.

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Keep driving?: No -- stop driving
DIY difficulty: moderate
Estimated cost: $80 - $350 (parts and labor)

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Common Symptoms

Engine cranks but will not start
Engine stalls and will not restart
Tachometer reads zero during cranking
Check Engine Light illuminated
No spark from ignition system

Probable Causes (Ranked by Likelihood)

Failed crankshaft position sensor Very High
Broken or disconnected sensor wiring High
Corroded sensor connector preventing signal High
Sheared reluctor ring or damaged crankshaft trigger wheel Moderate
PCM engine speed input circuit failure Low

Step-by-Step Diagnostic Procedure

Verify no RPM signal on the scan tool during cranking -- confirms no signal is reaching the PCM
Test the CKP sensor output with a multimeter set to AC volts during cranking -- should produce 0.5V or more
Check for 5V reference voltage (Hall effect sensor) or proper ground at the sensor connector
Inspect the sensor and reluctor ring for physical damage, metal debris, or contamination
If the sensor and wiring test good, check for signal continuity from the sensor to the PCM connector

Common Fixes by Vehicle

What techs usually find when diagnosing P0322 on specific vehicles — tap your vehicle for the fix and the exact part:

2005-2012 Nissan 2.5L/3.5L (Altima, Maxima, Murano) easy DIY

Replace CKP sensor -- Nissan sensors with no signal usually failed outright. Also inspect reluctor ring on crank for damage. If CKP replacement doesn't restore, ECM connector C1 pins on Nissan need inspection.

Labor: 30 min

Common fix part Hitachi Nissan CKP Sensor View on Amazon→ Compare fitment at PartsGeek→

2004-2011 Ford Focus 2.0L/2.3L Duratec easy DIY

Replace CKP sensor (Motorcraft DU-88). Focus 2.0/2.3 sensors fail with heat. Also check tone ring on back of crankshaft -- if chipped, sensor reads no signal. Inspect by removing sensor and rotating engine.

Labor: 30 min

Common fix part Motorcraft DU-88 CKP Sensor View on Amazon→ Compare fitment at PartsGeek→

2003-2010 Mitsubishi Galant/Eclipse 3.8L easy DIY

Check wiring first -- Mitsubishi CKP harness shares a connector with the CMP and corrodes internally. Unseat pins, clean with contact cleaner, apply dielectric grease. If wiring is good, replace sensor with OEM Mitsubishi.

Labor: 45 min

Common fix part NTK Mitsubishi CKP Sensor View on Amazon→ Compare fitment at PartsGeek→

Frequently Asked Questions

Can I drive with code P0322?

No. With no engine speed signal, the PCM cannot control ignition or fuel injection. The engine will not start or will stall and not restart.

Can a CKP sensor fail from heat?

Yes. Crankshaft position sensors are exposed to engine heat and can fail when hot, then work again when cool. This is one of the most common intermittent failure patterns for CKP sensors.

Is this an easy DIY repair?

On most vehicles, replacing the CKP sensor is a moderate DIY task. The sensor is typically located near the front or rear of the crankshaft and held in by one or two bolts.