AutoCodes – Generic – P310E

P310E Code - Cylinder 2 High Pressure Fuel Injector Low Side/High Side Electrical

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: P310E indicates Cylinder 2 High Pressure Fuel Injector Low Side/High Side Electrical.
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.

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Code Popularity 1,739

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 16, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P310E 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 high voltage side of the fuel injector. The Diagnostic Trouble Code (DTC) is detected when there is a short circuit between the high-voltage side and the low-voltage side.

OBDII Code P310E - Cylinder 2 High Pressure Fuel Injector Low Side/High Side Electrical - AutoCodes.com — P310E Code - Cylinder 2 High Pressure Fuel Injector Low Side/High Side Electrical

What does this mean?

What are the Possible Causes of the DTC P310E?

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 P310E?

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 P310E 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 P310E code?

Need more information on how to fix the P310E code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P310E code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P310E BMW — Cylinder 2 High Pressure Fuel Injector Low Side/High Side Electrical
P310E MINI — Cylinder 2 High Pressure Fuel Injector Low Side/High Side Electrical

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 P310E Code

What does OBDII code P310E mean?

P310E indicates an electrical issue in the high side or low side circuit of the high-pressure fuel injector for cylinder 2.

What are the common symptoms of code P310E?

Symptoms include rough idling, misfires, reduced engine performance, poor fuel efficiency, or trouble starting the engine.

What causes code P310E to appear?

Possible causes include damaged wiring, a faulty injector, a bad fuel injector driver in the engine control module (ECM), or loose electrical connections.

Can I drive with a P310E code?

Driving with a P310E code is not recommended, as it can lead to further engine or fuel system damage and reduced performance.

How is P310E diagnosed?

A technician will use a scan tool to verify the code, inspect the injector wiring and connectors for damage, and test the injector circuit for continuity or resistance issues.

How do you fix code P310E?

Repairs may involve replacing the faulty injector, repairing damaged wiring or connectors, or in rare cases, replacing the ECM.

What tools are needed to diagnose code P310E?

A scan tool capable of reading live data, a multimeter for testing electrical circuits, and wiring diagrams for the specific vehicle are commonly used.

Can a dirty fuel injector cause code P310E?

No, a dirty injector typically causes performance issues but not an electrical fault like P310E. This code specifically points to an electrical problem.

How much does it cost to fix code P310E?

Repair costs vary depending on the root cause, but replacing a fuel injector can cost $150â€“$400, while wiring repairs or ECM replacement may be more expensive.

Is it hard to fix P310E on your own?

Repair difficulty depends on your experience. Testing electrical components and accessing injectors often require specialized tools and knowledge.