AutoCodes – Generic – P3105

P3105 Code - Cylinder 2 High-Pressure Fuel Injector Low Side Circuit Low

Quick Answer

The solenoid-controlled injection valve discharges a high-pressure spray into the combustion chamber. Common causes include Faulty Fuel Injector 2, Fuel Injector 2 harness is open or shorted, Fuel Injector 2 circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P3105 indicates Cylinder 2 High-Pressure Fuel Injector Low Side Circuit Low.
Common causes: Common causes include Faulty Fuel Injector 2, Fuel Injector 2 harness is open or shorted, Fuel Injector 2 circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 4,335

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 15, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P3105 Description

The solenoid-controlled injection valve discharges a high-pressure spray into the combustion chamber. The solenoid-controlled injection valve is a retracting-plunger valve characterized by a high level of flexibility in its spray-propagation pattern (angle and shape). The discharge orifices form the high-precision injection pattern. This provides even and consistent propagation. The retracting-plunger solenoid-controlled injection valve continues to maintain stable propagation properties, even at the temperatures and pressure levels encountered within the combustion chamber. Fuel is injected into the combustion chambers under high pressure (between 50 and 200 bar) during the intake and compression strokes. During the warm-up phase yet another, a minute quantity of fuel is injected to assist the catalytic converter to reach its effective operating temperature more quickly (catalytic converter heating). During cold starting, the fuel is sprayed during the compression stroke in multiple pulses. This strategy provides reliable cold-starts along with substantive improvements in the areas of pollutant emissions and fuel consumption.
The Digital Motor Electronics (DME) diagnosis monitors the activation of the low voltage side of the fuel injector. The Diagnostic Trouble Code (DTC) is detected when there is a short circuit to ground.

OBDII Code P3105 - Cylinder 2 High-Pressure Fuel Injector Low Side Circuit Low - AutoCodes.com — P3105 Code - Cylinder 2 High-Pressure Fuel Injector Low Side Circuit Low

What does this mean?

What are the Possible Causes of the DTC P3105?

Faulty Fuel Injector 2
Fuel Injector 2 harness is open or shorted
Fuel Injector 2 circuit poor electrical connection
Faulty Digital Motor Electronics (DME)

How to Fix the DTC P3105?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P3105 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P3105 code?

Need more information on how to fix the P3105 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P3105 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P3105 BMW — Cylinder 2 High-Pressure Fuel Injector Low Side Circuit Low
P3105 MINI — Cylinder 2 High-Pressure Fuel Injector Low Side Circuit Low

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P3105 Code

1. What are common symptoms of OBDII code P3105 (Cylinder 2 High-Pressure Fuel Injector Low Side Circuit Low)?

- Common symptoms include rough engine idle, hesitation or misfiring during acceleration, and a noticeable decrease in fuel efficiency.

2. What are the potential causes of OBDII code P3105?

- The code P3105 can be caused by issues such as a faulty high-pressure fuel injector, a wiring or connector problem in the fuel injector circuit, or a problem with the Engine Control Module (ECM).

3. How can I diagnose the cause of OBDII code P3105?

- Diagnosing the cause of P3105 may involve conducting a visual inspection of the fuel injector and its wiring, checking for continuity and resistance in the circuit, and using a scan tool to monitor fuel injector operation.

4. Can a clogged fuel injector cause OBDII code P3105?

- Yes, a clogged high-pressure fuel injector can restrict fuel flow and lead to low side circuit issues, triggering code P3105.

5. What are some repair tips for addressing OBDII code P3105?

- Repair tips may include cleaning or replacing the affected fuel injector, repairing any damaged wiring or connectors, and resetting the ECM after addressing the issue.

6. Is it safe to continue driving with OBDII code P3105 present?

- It is not recommended to continue driving with code P3105 present, as it can lead to engine performance issues and potential damage if left unresolved.

7. Can weather conditions affect the occurrence of OBDII code P3105?

- Extreme weather conditions, such as very high or low temperatures, can sometimes exacerbate fuel injector issues and trigger code P3105.

8. How much does it typically cost to repair OBDII code P3105?

- The cost of repairing P3105 can vary depending on the underlying cause, but it may range from a few hundred to over a thousand dollars, including parts and labor.

9. Are there any preventative maintenance measures to avoid OBDII code P3105?

- Regularly scheduled fuel system maintenance, such as using high-quality fuel and additives, can help prevent issues that may lead to code P3105.

10. Can a DIY enthusiast tackle the repair for OBDII code P3105?

- While some aspects of addressing P3105 may be DIY-friendly, diagnosing and repairing complex fuel injector and wiring issues may require professional expertise and specialized tools.