What is an OBD2 code?

An OBD2 (On-Board Diagnostics) code is a diagnostic trouble code (DTC) generated by your vehicle's computer system when it detects a problem. These codes help identify specific issues with your vehicle's engine, transmission, emissions, or other systems.

How do I read OBD2 codes?

To read OBD2 codes, you'll need an OBD2 scanner. Plug it into your vehicle's OBD2 port (usually located under the dashboard), turn your key to the 'ON' position, and follow your scanner's instructions to retrieve the codes. Each code starts with a letter (P, B, C, or U) followed by four numbers.

What do the different types of OBD2 codes mean?

OBD2 codes are categorized by their first letter: P (Powertrain) for engine and transmission issues, B (Body) for interior systems like airbags, C (Chassis) for mechanical systems like brakes, and U (Network) for computer and module communication problems.

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Home » OBD2 Codes » P0320

Code P0320

Symptoms

• Engine may not start

• Engine stalls or misfires

• Check Engine Light is on

Common Causes

• Faulty crankshaft position sensor

• Damaged or corroded wiring or connectors

• Faulty engine control module (ECM)

Glossary

ECM: Engine Control Module

RPM: Revolutions Per Minute

Related Codes

• P0335

• P0340

Official description

Ignition/Distributor Engine Speed Input Circuit

Laymans terms

This code means the car's computer isn't getting the right signals from the engine about how fast it's spinning. It's like trying to ride a bike without knowing how fast you're going.

Explanation

The P0320 code indicates a problem with the signal from the ignition/distributor engine speed sensor to the engine control module (ECM).

Technical description

The ignition/distributor engine speed input circuit is responsible for providing the ECM with information about the engine's RPM (revolutions per minute). This input is crucial for the ECM to control ignition timing and fuel injection. A malfunction in this circuit can disrupt engine performance.

Diagnosis steps

• Use an OBD-II scanner to confirm the code.

• Inspect the crankshaft position sensor and its wiring for damage.

• Test the sensor with a multimeter to ensure it's functioning properly.

Repair procedures

• Replace the crankshaft position sensor if faulty.

• Repair or replace damaged wiring or connectors.

• Replace the ECM if necessary.

Tools required

• OBD-II scanner

• Multimeter

• Basic hand tools

Estimated repair cost

$100 - $300

Difficulty level

Moderate

Commonly affected vehicles

• Ford F-150

• Chevrolet Silverado

• Toyota Camry

Preventive measures

• Regularly inspect and maintain engine sensors.

• Keep wiring and connectors clean and secure.

• Perform routine diagnostic checks.

Error code type

Sensor Issue

User experience recommendations

• Don't ignore the Check Engine Light.

• Have the vehicle inspected by a professional if unsure.

• Regular maintenance can prevent such issues.

Warranty information

Check if the vehicle's powertrain warranty covers sensor replacements.

Historical data

This code has been common in vehicles with aging sensors or wiring issues.

Urgency level

Moderate – Addressing this issue promptly can prevent further engine damage.

Legal and safety notice

Driving with this code may lead to engine performance issues and is not recommended.

Testing conditions

• Engine running

• Vehicle stationary

Component location

The crankshaft position sensor is typically located near the crankshaft pulley at the front of the engine.

FAQs

Q: Can I drive with a P0320 code?
A: It's not recommended as it can lead to engine performance issues.

Q: How long does it take to fix a P0320 code?
A: It depends on the cause, but typically it can be resolved in a few hours.

Last updated: Mar 2, 2026 • Source: internal database

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