P0172 system too rich bank 1

Basically this means that an oxygen sensor in bank detected a rich condition (too little oxygen in the exhaust). A proper air-fuel ratio of about 14. This has been going on for a long time. According to Repair Pal , a rich mixture represents an air to fuel ratio of below 14. Normally, the engine control module makes adjustments to the mixture by increasing or decreasing the fuel injection.

The Engine Control Module () calculates the necessary compensation to correct the offset between. The Delphi Training Series breaks it down for you. If the HO2S indicates a lean condition, the fuel trim values will be above percent.

The short term FT values change rapidly in response to the HO2S voltage signals. Bank refers to the rich condition being detected on the side of the engine with cylinder. A rich condition indicates that the air fuel mixture has too much fuel or not enough air. Definition Combustion engines work by burning the mixture of air and fuel of about 14.

The PCM has detected a rich exhaust condition for engine bank 1. The term “rich” is defined as excessive fuel. South Main Auto Repair LLC 144views. What this means is that it is reducing the amount of fuel it can inject to its bare minimum in this bank of cylinders.

You’ll find in-depth information, technical service bulletins, code definitions and step-by-step tests, and easy-to-understand wiring diagrams, along with descriptions of how the systems work. I do have an sensor disconnecte BankSensor Cut the wires trying to get it out.

If I take the cables off the battery, let computer reset, truck will run correct and no code for a while. As its definition suggests, this code describes a rich condition problem (exhaust with too little oxygen) on O(oxygen) sensor Bank 2. My service engine soon light has just turn on. Before the light came on the the engine shut off when I turned on the Air Conditioner. Your code is for system too rich according to your scanner.

It still holds the code in the ECU, but thats about it. Short term fuel trim is almost always in minus between and -8. Fuel economy great, better than original specs.

Not sure if this is the right place for this but here it goes, Okay so these are the codes im getting. The test fails when the adaptive fuel tables reach a rich calibrated limit.

Refer to Section , Powertrain Control Software Fuel Trim for more information. CRC MAF cleaner and replaced the gas cap. I will clear it and get a couple hundred miles on the car, but then the light will come back on.

The fuel trim consists of both the short-term and long-term fuel trims. User(s) are reading this topic ( Guests and Anonymous Users) Members: Get your Volvo listed in the Garage Today, for FREE, to share with the world what you drive and what toys and modifications you have. So the first thing I did was watch the fuel trims with the scan tool at closed loop and the LT is -, ST is - at idle at 0rpms the ST han. Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder. Manifold absolute pressure sensor, throttle position sensor, engine coolant temperature sensor, open thermostat, leaking fuel injectors, failing fuel pressure regulator, failing oxygen sensors.

The intake air temperature is between -20°C (-4°F) and 90°C (194°F). The mass air flow is between 5. The engine speed is between 4RPM and 0RPM. The TP sensor angle is less than.

I had a mechanic look at the cylinders and he said they look good. Note: The use of oiled air filters can cause the MAF to become dirty if the filter is over-oiled. If the engine is not getting enough air the system is rich.

A couple of months ago it started idling low and a couple of times on the freeway it was jumpy. If I do that but it re appears what suggestions do you have to resolve it. Here is the history of the current repair so I can get some advice from you FINE GENTS hopefully.

Update: Here are more details in US units. Fuel system status: Closed loop Calculated Load Value: engine Coolant Temperature: 187F short Term Fuel Tri-28. Is a typical symptoms of an engine that is running rich ( too much fuel, not enough air) are poor fuel economy, elevated emissions (Carbon monoxide or CO), and engine may have rough idle or surge condition.

Hey folks, My RL has been running rough for awhile. Finally got my hands on a code reader. I know it could be a vacuum leak or a exhaust leak and i couldnt find either. Possible cause number one is a bad Osensor.

I notice at times i have to hold the starter longer for it to kick over and some times it cranks right over in a split second. Most of the time it fires right up first start of the day and on ocassion. This vehicle is equipped with the M2engine.

MAF sensor failures are extremely rare on these engines. I'd be checking the pipes under the inlet manifold. Air leak by the looks of that. Dirt On The MAF Mass Air Flow Sensor can cause MAF Mass Air Flow Sensors To overestimate air flow.

Read the long term and compare with the short term. For more information, please contact your car dealer. The emissions was high in NOx, but just barley.

When I pass the emissions NOx had only come down.