P0271 MERCEDES-BENZ Code - Cylinder 4 Injector 'A' Circuit High
|P0271 MERCEDES-BENZ code possible causes
- Dirty Fuel Injector 4
- Faulty Fuel Injector 4
- Plugged Fuel Injector 4
- Fuel injector 4 harness is open or shorted
- Fuel injector 4 circuit poor electrical connection
- Faulty Engine Control Module (ECM)
|How do I fix the P0271 MERCEDES-BENZ code?Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
|P0271 MERCEDES-BENZ code tech notesMercedes Benz Code = 0305 The injection valve output stage of cylinder 4 detects a short circuit to positive. (P0271)
Clogged or partially clogged fuel injector can cause this code. Start by performing an injector flush before replacing the injector.
|Cost of diagnosing the P0271 MERCEDES-BENZ code
Labor: 1.0The cost of diagnosing the P0271 MERCEDES-BENZ code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
|What are P0271 MERCEDES-BENZ code possible symptoms?
- Engine Light ON (or Service Engine Soon Warning Light)
- Engine Misfire
- Engine Run Rough
- Low MPG
|P0271 MERCEDES-BENZ code descriptionThis 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.
|Need more information with the P0271 MERCEDES-BENZ code?Need more information on how to fix the P0271 MERCEDES-BENZ code? Get Access to Factory Service Manuals
|Need help with a P0271 MERCEDES-BENZ code?Get the P0271 Mercedes-benz code diagnosed by a professional: Find a repair shop in your area
|P0271 MERCEDES-BENZ code commentsHelp us improve AutoCodes.com. Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the P0271 Mercedes-benz code? Have you replaced any parts?
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