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 » P3107

Code P3107

Symptoms

• Check Engine Light (CEL) is on

• Poor engine performance

• Increased fuel consumption

Common Causes

• Faulty fuel injector in cylinder 2

• Wiring issues or poor connections

• ECM malfunction

Glossary

ECM: Engine Control Module

Injector: A device that sprays fuel into the engine

Related Codes

• P0302

• P0202

Official description

Cylinder 2 High Pressure Injector Low Side Booster Time Error

Laymans terms

This code means that the car's computer found a problem with the fuel injector for cylinder 2. It's like a tiny hose that sprays fuel into the engine, and it's not working right.

Explanation

The engine control module (ECM) has detected an issue with the timing of the low side booster for the high-pressure injector in cylinder 2.

Technical description

P3107 indicates that the ECM has detected an error in the timing of the low side booster circuit for the high-pressure fuel injector in cylinder 2. This could be due to an electrical fault or a mechanical issue within the injector itself.

Diagnosis steps

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

• Inspect the wiring and connectors for cylinder 2 injector.

• Test the injector for proper operation.

Repair procedures

• Repair or replace damaged wiring or connectors.

• Replace the faulty injector.

• Reprogram or replace the ECM if necessary.

Tools required

• OBD-II scanner

• Multimeter

• Fuel injector tester

Estimated repair cost

$200 - $600

Difficulty level

Moderate

Commonly affected vehicles

• Vehicle 1

• Vehicle 2

• Vehicle 3

Preventive measures

• Regular maintenance of fuel system

• Check and clean injectors periodically

• Ensure quality fuel is used

Error code type

Engine Performance

User experience recommendations

• Avoid driving with the check engine light on.

• Get the vehicle inspected by a professional.

• Regularly maintain the fuel system.

Warranty information

Check with your vehicle manufacturer for warranty coverage on fuel injectors.

Historical data

This code has been associated with injector issues in certain vehicle models, leading to recalls and service bulletins.

Urgency level

Moderate – It should be addressed soon to avoid further engine performance issues.

Legal and safety notice

Driving with a malfunctioning injector can lead to increased emissions and potential engine damage.

Testing conditions

• Engine running

• Vehicle at operating temperature

Component location

The high-pressure fuel injector for cylinder 2 is located on the engine, typically near the intake manifold.

FAQs

Q: Can I drive with a P3107 code?
A: It's not recommended to drive for long periods with this code as it can lead to engine performance issues.

Q: How do I clear a P3107 code?
A: After repairs, use an OBD-II scanner to clear the code, but ensure the issue is resolved first.

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

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