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 » U3513

Code U3513

Symptoms

• Warning light on the dashboard

• Intermittent operation of vehicle systems

• Loss of functionality in specific vehicle features

Common Causes

• Faulty control module

• Damaged wiring or connectors

• Network configuration error

Glossary

OBD-II: On-Board Diagnostics, a standardized system in vehicles for self-diagnostics and reporting.

ECU: Electronic Control Unit, a computer that controls various functions in a vehicle.

Related Codes

• U0100

• U0155

Laymans terms

This code means that the car's computer is having trouble talking to one of the parts in the car. It's like when your phone can't connect to the internet.

Explanation

U3513 is a communication error code indicating a problem with data transmission between modules in the vehicle.

Technical description

The U3513 code is set when there is a loss of communication with a specific module or component in the vehicle's network. This could be due to wiring issues, a faulty module, or network configuration problems.

Diagnosis steps

• Check for other related codes

• Inspect wiring and connectors for damage

• Test the communication network for faults

Repair procedures

• Repair or replace damaged wiring

• Replace faulty control module

• Reconfigure the network settings

Tools required

• OBD-II scanner

• Multimeter

• Wiring diagram

Estimated repair cost

$150 - $500

Difficulty level

Moderate

Commonly affected vehicles

• Ford Focus

• Chevrolet Malibu

• Toyota Camry

Preventive measures

• Regular vehicle maintenance

• Inspect wiring for wear and tear

• Update vehicle software regularly

Error code type

Communication Error

User experience recommendations

• Avoid driving until the issue is resolved

• Consult a professional mechanic

• Keep a record of any recurring issues

Warranty information

Check with your vehicle manufacturer for warranty coverage on electrical components.

Historical data

U3513 is not a commonly reported code, but it has been associated with network issues in vehicles with advanced electronic systems.

Urgency level

Moderate – This issue should be addressed soon to prevent further complications.

Legal and safety notice

Driving with this error code may affect vehicle safety and performance. Consult a professional for repairs.

Testing conditions

• Vehicle in ignition on position

• All electrical systems powered

Component location

The affected module is typically located within the vehicle's electronic control unit (ECU) network.

FAQs

Q: Can I drive my car with a U3513 code?
A: It's not recommended to drive with this code active, as it may affect vehicle performance and safety.

Q: How do I clear a U3513 code?
A: After repairs, use an OBD-II scanner to clear the code from the vehicle's computer.

Last updated: Oct 28, 2025 • Source: internal database

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