P0173 BMW Code - Fuel Trim Malfunction Bank 2
|P0173 BMW code possible causes
- Intake air leaks
- Faulty front heated oxygen sensor
- Ignition misfiring
- Faulty fuel injectors
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Faulty Mass Air Flow (MAF) sensor
- Incorrect Positive Crankcase Ventilation (PCV) hose connection
|How do I fix the P0173 BMW 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.
|P0173 BMW code tech notesDirty air filter of faulty air flow sensor are common causes for the P0173 code of the problem.
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|Cost of diagnosing the P0173 BMW code
Labor: 1.0The cost of diagnosing the P0173 BMW 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.
|When is the P0173 BMW code detected?- Fuel injection system does not operate properly.
- The amount of mixture ratio compensation is not correct
|What are P0173 BMW code possible symptoms?
- Engine Light ON (or Service Engine Soon Warning Light)
- Excessive Fuel Consumption
|P0173 BMW code descriptionWith the Air/Fuel Mixture Ratio Self-Learning Control, the actual mixture ratio can be brought closely to the theoretical mixture ratio based on the mixture ratio feedback signal from the heated oxygen sensors 1. The Engine Control Module (ECM) calculates the necessary compensation to correct the offset between the actual and the theoretical ratios.
In case the amount of the compensation value is extremely large (The actual mixture ratio is too lean.), the ECM judges the condition as the fuel injection system malfunction and light up the MIL (2 trip detection logic).
|Need more information with the P0173 BMW code?Need more information on how to fix the P0173 BMW code? Get Access to Factory Service Manuals
|Need help with a P0173 BMW code?Get the P0173 Bmw code diagnosed by a professional: Find a repair shop in your area
|P0173 BMW 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 P0173 Bmw code? Have you replaced any parts?
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