OBD-II Error Code P0320: How to Fix Ignition/Distributor Engine Speed Input Circuit

Medium 1-3 hours depending on vehicle Medium Severity Verified June 2026
Error Code
P0320
Brand
OBD-II Generic
Product Type
automotive
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
1-3 hours depending on vehicle
Error code P0320 indicates a problem with the ignition/distributor engine speed input circuit. This means the engine control module (ECM) is not receiving a proper signal from the crankshaft position sensor or related components, which can cause starting issues or poor engine performance.
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Tools You'll Need

How to Fix Error Code P0320

  1. Check for Stored Diagnostic Trouble Codes

    Ensure the ignition is off before connecting the scanner.
  2. Inspect the Crankshaft Position (CKP) Sensor Wiring

  3. Test the CKP Sensor Resistance

    Always work on a cold engine to avoid burns.
  4. Check for Signal Output from CKP Sensor

    Be cautious of moving engine parts while cranking.
  5. Inspect the Timing Belt or Chain

    Timing belt replacement is complex. Consult a repair manual for your specific vehicle.
  6. Check the ECU Grounds and Power Supply

Parts You May Need

Crankshaft position sensor
Check Price on Amazon
Engine wiring harness connector
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Crankshaft position sensor
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Engine wiring harness connector
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Crankshaft position sensor
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Engine wiring harness connector
Check Price on Amazon
Crankshaft position sensor
Check Price on Amazon
Engine wiring harness connector
Check Price on Amazon
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When to Call a Professional

If you have checked the sensor, wiring, and timing and the code persists, or if you are not comfortable working with engine electronics, consult a professional mechanic.

Frequently Asked Questions

Can I drive my car with error code P0320?
It is not recommended. P0320 can cause the engine to stall or not start, leading to unsafe driving conditions. Have it diagnosed and repaired as soon as possible.
What are common symptoms of P0320?
Symptoms include engine cranks but won't start, intermittent stalling, rough idle, and lack of power. The check engine light will be illuminated.
How much does it cost to fix code P0320?
Cost varies by vehicle and cause. DIY repair can be as low as $30 for a sensor; professional repair typically ranges from $150 to $400 including labor.
Is P0320 the same as a bad crankshaft position sensor?
Often yes, but other issues like wiring problems, ECU faults, or timing belt issues can also trigger the code. Proper diagnosis is essential.
Can a bad battery cause P0320?
Low battery voltage can cause erratic sensor readings, but it rarely triggers P0320 directly. A weak battery should be tested and replaced if needed.