P0321 - OBD II Trouble Code

Our automotive experts have put together the following information about the P0321 diagnostic trouble code. We've provided the common symptoms that occur when this code is set along with the frequent repairs that address the issues related to the P0321 code.

What Does P0321 Code Mean?

OBD-II Code P0321 is defined as a Ignition/Distributor Engine Speed Input Circuit Range/Performance

The Crankshaft Position Sensor measures the exact rotational speed and position of the crankshaft. This provides a critical data signal used by the Powertrain Control Module (PCM) to control Ignition Spark Timing and Fuel Delivery. This sensor may be built into the distributor on older vehicles. When the PCM detects an irregular signal or no signal, it will set code P0321.

P0321 Symptoms

• Decreased engine performance
• Engine may not start
• Increased fuel consumption

Common Problems That Trigger the P0321 Code

• Broken tone ring
• Crankshaft Position Sensor (CKP) failure
• Distributor failure
• Powertrain Control Module (PCM) failure
• Wiring issue

Common Repairs Needed for the P0321 Code

• Crankshaft Position Sensor Replacement