P0321 Code: Ignition / Distributor Engine Speed Input Circuit Range / Performance

Your vehicle’s powertrain control module (PCM) monitors the crankshaft’s position and the speed of its shaft using the crankshaft position sensor (CKP). If the PCM detects that something is wrong with the signal coming from this sensor, it might log error code P0321.

What Does the P0321 Code Mean?

Diagnostic trouble code (DTC) P0321 stands for “Ignition/Distributor Engine Speed Input Circuit Range/Performance.”

The crankshaft position sensor monitors the crankshaft’s rotational speed and position and sends the data to the PCM. The PCM uses the information to control ignition spark timing and fuel delivery. On older vehicles, the CKP is usually integrated into the distributor.

When the PCM detects irregular or no signal from the CKP, it will set code P0321. This usually occurs when there is an electrical issue in the circuits involved in the process. The conditions that can trigger the code might vary, depending on how the manufacturer wants to identify the fault.

Note: The definition of code P0321 might be different depending on the vehicle manufacturer. Consult the appropriate repair manual or repair database for the exact code definition.

What are the Common Causes of the P0321 Code?

• Defective CKP sensor
• Issues with the CKP sensor or CMP sensor circuit, such as damaged wires or poor connections.
• Faulty CMP sensor
• Damaged crankshaft or camshaft sensor tone wheel
• An issue with the PCM, such as software in need of an update

What are the Common Symptoms of the P0321 Code?

• The check engine light is on
• Engine goes through a hard start or doesn’t start despite cranking up
• Engine hesitates or stalls during acceleration
• Engine dies and refuses to restart

How to Diagnose the P0321 Code

The P0321 code is a generic code that various makes and models can log. This does not, however, mean that there is a one-size-fits-all solution to determining its underlying problem.

The steps for troubleshooting this code will differ, depending on the vehicle. Check out this video to get an idea of what the diagnostic process for this code might involve:

How to Fix the P0321  Code

The repair procedure for the P0321 code usually varies depending on the vehicle. For example, the repair steps for a P0321 code in a VW might differ from the steps that will fix the same code in an Audi.

So if you want to fix your vehicle on your own, make sure you consult a vehicle-specific repair manual or an online repair database. Alternatively, you can leave the job to a professional.

How to Get a New Crankshaft Position Sensor

The worst thing about dealing with a faulty crankshaft position sensor isn’t the P0321 code. It’s everything else that comes with it. Your engine is likely to stall, hesitate, or even refuse to start, leaving you stranded at the most inconvenient time. Unless you want to deal with all of that, you should replace your CKP sensor as soon as possible. Thankfully, you can get a new CKP sensor at CarParts.com with just a few clicks.

At CarParts.com, you can find a wide selection of high-quality crankshaft position sensors at different price points. We’re dedicated to giving you the best deals every time, so we offer a price match guarantee. If you find a competitor advertising the same product at a lower price, let us know and we’ll either match or beat that price on the spot.

Don’t wait until your faulty CKP sensor prevents your car from starting before replacing it. Check out our catalog of high-quality crankshaft position sensors at CarParts.com and order today!