P0321
Ignition/Distributor Engine Speed Input Circuit Range/Performance
P0321 is an OBD-II diagnostic trouble code meaning: Ignition/Distributor Engine Speed Input Circuit Range/Performance. Common causes: faulty engine speed sensor, open or short circuit in wiring harness. Estimated repair cost: $56–167.
Symptoms
- Unstable engine operation
- Misfires
- Difficulty starting the engine
- Power reduction
- Increased fuel consumption
Causes
- Faulty engine speed sensor
- Open or short circuit in wiring harness
- Bad contacts in connectors
- Gear damage
- Ignition module malfunction
How to Fix
- Check the condition of the engine speed sensor
- Inspect the wiring harness for damage
- Check contacts in connectors
- Test the sensor signal using an oscilloscope
- Replace sensor if necessary
Related codes
Error P0321 by Vehicle Brand
FAQ
What does the P0321 code mean?
P0321 is an OBD-II diagnostic trouble code that indicates: Ignition/Distributor Engine Speed Input Circuit Range/Performance
What causes a P0321 error code?
The most common causes of P0321 include: Faulty engine speed sensor; Open or short circuit in wiring harness; Bad contacts in connectors; Gear damage.
How do I fix a P0321 diagnostic trouble code?
To fix P0321: Check the condition of the engine speed sensor. Inspect the wiring harness for damage. Check contacts in connectors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0321?
Limited driving only, diagnose soon
How much does it cost to fix P0321?
The estimated repair cost for P0321 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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