Bmw 550i p0172

Combustion engines run most efficiently when they maintain an air-fuel mixture ratio of When the upstream oxygen sensor detects there are less than To keep the engine running properly, the powertrain control module PCM tries to compensate for the rich condition by injecting less fuel to the mixture in an effort to maintain the proper When these adjustments become too large, code P is triggered. It is okay to drive a vehicle with P for a short period of time, but driving with this code for an extended period of time can cause internal engine damage and failure of the catalytic converter.

It is important to complete the entire diagnostic process when diagnosing P Reading and analyzing fuel trims and the freeze frame data is the key to properly diagnosing P For error code P, one or more of the below repairs may be needed to solve the underlying issue. For each possible repair, the estimated cost of repair includes the cost of the relevant parts and the cost of labor required to make the repair.

Got FIXD and found out it was a different issue. Guess we gotta find a new mechanic. Thanks FIXD! On a Honda Pilot the MIL continuously throw codes p and p simultaneously never one at a time after reset roughly after 44 miles driven. So what should be added to the check list is the following items in terms of difficulty. While removed clean throttle body with approved cleaner. So now I am left with another task that is not listed. It is around a Hour Job. You can severely damage the engine if something goes wrong.

Shop around for the best dealI will post if thit is the cause.

I have an 04 Honda Accord V6 and engine light came on. Got a diagnostic code of P What is that? I was told to change the air filter.This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation.

P0175 OBD-II Trouble Code: P0175 System Too Rich (Bank 2)

Our certified mobile mechanics can come to your home or office to perform the Check Engine Light is on diagnostic inspection. This code will set when the ECM can not compensate for the amount of air or fuel required to return the air fuel ratio back to the set parameters. For gasoline powered engines, the most fuel efficient and cost efficient air fuel ratio is This ratio also creates the maximum amount of power during the combustion process.

The combustion process is very simple yet fragile. In most vehicles, there are four to eight combustion chambers within the engine. The spark is delivered to each combustion chamber a nanosecond after the air and fuel reaches the chamber to ignite it. There is a piston in each combustion chamber; each piston is forced down by the combustion at a rapid rate, and at different times. The difference in the timing of each piston is determined by the air fuel ratio and the timing of the engine.

Once the piston is down, it must return to the up position in time for its next combustion process. The piston is forced back up little by little each time one of the other cylinders undergoes its own combustion process because they are all connected to a rotating assembly known as the crankshaft. If something in this process goes out of sequence, internal engine components will work harder and work against each other, or the engine may even not run at all.

In the case of code P, there will likely be higher gas consumption, as the ECM has detected that there is too much fuel being used. Uses a scan tool to read the engine temperature, then compares the findings to an infrared thermometer. A system that is running too rich will force the catalytic convertor to filter out more pollutants, which will shorten the lifespan of the catalytic convertor.

P0175 BMW - Mixture Control 2 System Too Rich Bank 2

Improper air fuel ratio causes the engine to work harder, which will shorten the lifespan of the engine. I strongly suggest verifying that the cooling system of the vehicle is working correctly. If the vehicle is running abnormally cool, the engine will always run in a rich condition. This is because the ECM is designed to run at a rich rate when cold to help warm the engine up faster.

If the coolant temperature sensor is faulty or the thermostat is stuck open, the vehicle may never reach a warm temperature, which will cause it to always run in a rich condition. YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle.

Get a quote and book an appointment online or speak to a service advisor at Our certified mobile mechanics perform over services, including diagnostics, brakes, oil changes, scheduled mileage maintenances, and will come to you with all necessary parts and tools. With YourMechanic you can skip the auto shop altogether.

They send certified and screened mechanics straight to your door and enable you to save big on car repair and maintenance. Cost of diagnosing the P code. No more waiting rooms! Our mechanics will come to you to diagnose and fix the P code. Excellent Auto Repair Ratings. YourMechanic Auto Repair. Recent Check Engine Light is on Inspection reviews. Excellent Rating. Average Rating 4. Number of Reviews 5, Rating Summary.Coronavirus update: New contactless services to help keep you safe.

6-Cylinder Engine Oxygen Sensor Replacement

Sherry the lady I spoke with was awesome, their sales manager on the other hand was full of crap. They left the car listed for sale over 2 weeks after they had taken a deposit from someone else. In my opinion Someone they knew had to be buying this car as I've never seen a dealership act in this manner. They didn't seem to have my best interest in mind because they would never follow up with repairs that they said that they would take care of.

I have made numerous calls to them for a period of three weeks. I work in law enforcement and expect more when I do business. Staff didnt attend to us at all! Nobody dressed professionally, and I constantly had to go chase down a salesman to ask him questions about the car I wanted, and even then his careless attitude made me leave.

Nice sales person i spoke to, Brandan I think. Unfortunately, I waiting too long to go to see this Jeep and someone else came to buy before i could decide. I found another one now so no longer looking. They were not rude, but not helpful at all. Bank statements, and county paperwork for each month.

Needless to say I walked away with no car, and a bad taste in my mouth about this dealership. Louis and David my salesman was great as well. So all in all I think they are good. Dealer disappointed we didn't finance through them. Wouldn't fix damaged bumper, wouldn't come down in price.

We paid to much for the 4 runner, but we love the 4 runner it's a keeper. They were willing to help and responsive, but the vehicle was overpriced. The electronic suspension on the Mercedes was shot and repair cost is not figured into the price. Wiley was nice friendly n understanding was able to work with me truly appreciate the service and will reccomend X drive to my friends.

I applied and did not receive a call to say we received your application and we will be in touch. I waited a few day and call to get the status of my application. If I am approved or not, good customer service is a service. Great experience!!!

Shawn was so easy to work with. So glad we decided to make the 3 hour drive. Took the vehicle home, after 2 days check engine.

Took the vehicle Range Rover service and they said this car has a lot of problems. It Was easy experience financing was 20 minutes and gone.Log In or Create Account Optional.

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Additional M Models. BMW i. Other Electrified Models Learn More. Explore Local Inventory. ZIP Code.Play Now. 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. How much do you know about cars? Take the AutoCodes. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type.

When is the code detected? The mixture ratio is too rich. 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. Get Access to Factory Service Manuals. Need more help? Get the P Bmw code diagnosed by a professional: Find a repair shop in your area. Why is the Engine Light ON? Comments Help us improve AutoCodes.

Leave a comment below or tell us if the information above help you fix the code. What are the symptoms on your vehicle for the P Bmw code? Have you replaced any parts? Any information is appreciated. Repair Importance Level: 3.Oxygen sensors monitor the exhaust stream, comparing the oxygen content in it to the oxygen content of ambient air.

When oxygen content is low, sensor voltage is high. When oxygen content is high, sensor voltage is low.


The voltage created by the sensor is sent to the DME engine control module to help maintain a proper fuel mixture. The mixture preparation is used to keep the catalytic converters running at peak efficiency. The oxygen sensors used in E60 models covered in this article has four wires.

Two of which are for oxygen sensor heating and two for the signal. The heater is used to get the sensor online faster. Previously, exhaust heat was used. One wire supplied a ground to the sensor for the signal, and the other was for the sensor signal. Oxygen sensors should be replaced everymiles. In a perfect world that would be it. Wait until a specified mileage and replace the sensor.

However, these sensors fail prematurely, set oxygen sensor fault codes and reduce fuel economy. In this article, I will show you how to identify the location of all four oxygen sensors and how to replace them. You will need an oxygen sensor socket to remove the sensors and remember to always work with a cool exhaust. Oxygen sensors are fragile. Do not drop, as damage may occur. Also, keep the sensor tip clean when reinstalling.

Oxygen sensors are laid out in banks, which refer to cylinders and in sensor numbers referring to before or after the catalytic converter. Bank1 or B1 refers to cylinders Bank 2 or B2 refers to cylinders Sensor 1 or S1 refers to the sensor before the catalytic converter. Sensor 2 or S2 refers to the sensor after the catalytic converter. Remember that your car may have been serviced before and parts replaced with different size fasteners used in the replacement.

The sizes of the nuts and bolts we give may be different from what you have so be prepared with different size sockets and wrenches. Protect your eyes, hands and body from fluids, dust and debris while working on your vehicle. If working with the electrical system, disconnect the battery before beginning. Always catch fluids in appropriate containers and properly dispose of any fluid waste.

Recycle parts, packaging and fluids when possible.

P0175 BMW - Mixture Control 2 System Too Rich Bank 2

Never work on your vehicle if you feel the task is beyond your ability. Our vehicle may vary slightly from yours as models do change and evolve as they grow older. If something seems different, let us know and share your info to help other users.