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.
- 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
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 min2004-2011 Ford Focus 2.0L/2.3L Duratec easy DIY
Replace CKP sensor (Motorcraft). 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. Confirm the exact part for your year and engine with a retailer's fitment lookup or your VIN before ordering - these applications split by engine and build date.
Labor: 30 min2003-2010 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 minFrequently 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.
Mechanics Guide Step-by-step diagnosis
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
Sources 1
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
Commonly Affected Vehicles
- 2003-2013 Dodge Ram 1500
- 2004-2014 Jeep Grand Cherokee
- 2005-2015 Volkswagen Jetta
- 2006-2016 Audi A4
- 2007-2017 Jeep Wrangler
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