The P0321 trouble code is associated with Ignition or Distributor Engine Speed Input Circuit Range or Performance, indicating a range or performance issue with the circuit that monitors the engine speed from the ignition or distributor.
Ignition/Distributor Engine Speed Input Circuit Range/Performance
Code symptoms P0321.
1. Illuminated “Check Engine” or “Service Engine Soon” light on the dashboard.
2. Possible issues with engine starting and performance.
This code is common in brands such as:: Chevrolet, Renault, Ford, Toyota, Nissan, Mercedes Benz, Honda.
Causes of the code P0321.
1. Faulty ignition or distributor engine speed sensor.
2. Wiring or connection issues in the input circuit.
3. Problems with the Engine Control Module (ECM).
Code Solutions P0321.
1. Inspect and, if necessary, replace the ignition or distributor engine speed sensor.
2. Check for any faults or damages in the wiring or connections of the input circuit.
3. If ECM issues are suspected, consult a qualified technician for diagnosis and potential reprogramming or replacement.