Engine Error
P0321
Ignition/Distributor Engine Speed Input Circuit Range/Performance
Severity
Medium
Symptoms
Engine misfires, hesitation, random stalling
Common Causes
- Metal debris on crankshaft sensor
- Damaged reluctor ring teeth
- Faulty ignition speed sensor
- Interference from bad spark plug wires
How to Fix
- 1 Clean magnetic tip of the speed sensor
- 2 Inspect and replace reluctor ring
- 3 Replace engine speed sensor
- 4 Reroute or replace plug wires
Estimated Repair Cost
USD
$80
–
$500
Sensor cleaning: $80; Sensor replacement: $150 - $300