AutoCodes – Mercedes-Benz – P0276 Mercedes-Benz

P0276 Mercedes-Benz Code - Cylinder 6 Injector 'A' Circuit Low

Quick Answer

This fault code is stored in the Engine Control Module (ECM) when the injector control circuit does not behave as expected. Common causes include Dirty Fuel Injector 6, Faulty Fuel Injector 6, Plugged Fuel Injector 6. 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: P0276 Mercedes-Benz indicates Cylinder 6 Injector 'A' Circuit Low.
Common causes: Common causes include Dirty Fuel Injector 6, Faulty Fuel Injector 6, Plugged Fuel Injector 6.
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 14,502

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 Jun 02, 2022

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

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

Code P0276 Mercedes-Benz Description

This fault code is stored in the Engine Control Module (ECM) when the injector control circuit does not behave as expected. The ECM uses the induced voltage from the injector to indicate that the fuel injector circuit is operating correctly electrically. It does not signal the mechanical condition of the injector. When the ECM opens the ground circuit for an injector, to cease current flow, a voltage is induced into the winding. This voltage shows the electrical integrity of the injector and associated wiring. Absence of this induced voltage results in a fault code being stored in the ECM.

OBDII Code P0276 Mercedes-Benz - Cylinder 6 Injector 'A' Circuit Low - AutoCodes.com — P0276 Mercedes-Benz Code - Cylinder 6 Injector 'A' Circuit Low

What does this mean?

What are the Possible Causes of the DTC P0276 Mercedes-Benz?

Dirty Fuel Injector 6
Faulty Fuel Injector 6
Plugged Fuel Injector 6
Fuel injector 6 harness is open or shorted
Fuel injector 6 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0276 Mercedes-Benz?

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 does this mean?

Code Tech Notes

Mercedes Benz Code = 0314 The injection valve output stage of cylinder 6 detects a short circuit to ground. (P0276)

Clogged or partially clogged fuel injector can cause this code. Start by performing an injector flush before replacing the injector.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0276 Mercedes-Benz 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 P0276 Mercedes-Benz code?

Need more information on how to fix the P0276 Mercedes-Benz code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0276 Mercedes-Benz code diagnosed by a professional: Find a repair shop in your area

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 P0276 Mercedes-Benz Code

1. What does the OBDII code P0276 mean for a Mercedes-Benz?

Code P0276 indicates a problem with the Cylinder 6 Injector 'A' Circuit, specifically that the circuit is showing a low voltage condition.

2. What are the common symptoms of P0276 in a Mercedes-Benz?

Symptoms include rough idling, poor acceleration, engine misfires, reduced fuel efficiency, and possibly the Check Engine Light being illuminated.

3. What causes the P0276 code in a Mercedes-Benz?

Common causes include a faulty fuel injector, damaged wiring or connectors in the Cylinder 6 injector circuit, a malfunctioning Engine Control Module (ECM), or low fuel pressure.

4. How can I diagnose the P0276 code on my Mercedes-Benz?

Start by inspecting the wiring and connectors for Cylinder 6's injector, test the injector's resistance with a multimeter, and check for proper voltage and signal from the ECM.

5. Can I drive my Mercedes-Benz with the P0276 code active?

Driving with this code is not recommended as it can lead to engine performance issues, increased emissions, and potential damage to the catalytic converter.

6. How do I fix the P0276 code on a Mercedes-Benz?

Repairs may include replacing the faulty injector, repairing damaged wiring or connectors, cleaning clogged injectors, or in rare cases, replacing the ECM.

7. How much does it cost to fix the P0276 code in a Mercedes-Benz?

Costs can vary depending on the issue, ranging from $100-$300 for wiring repairs to $300-$800 for injector replacement. ECM replacement could cost $1,000 or more.

8. Can a clogged injector cause the P0276 code in a Mercedes-Benz?

Yes, a clogged or dirty injector can restrict fuel flow, leading to low circuit voltage and triggering the P0276 code.

9. Is the P0276 code specific to Mercedes-Benz?

No, P0276 is a generic OBDII code applicable to all OBDII-equipped vehicles, but the diagnosis and repair process may vary slightly depending on the vehicle make and model.

10. Will clearing the P0276 code fix the problem?

Clearing the code will only remove it temporarily; the underlying issue must be resolved to prevent the code from returning.