How to set the air/fuel ratio for M900? - 1995 Ducati Monster 900

P0174 FORD - Fuel Injection System Too lean Bank 2http://engine-codes.com/p0174_ford.htmlForum CodePossible 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 Tech notes The codes is usually set when there is an intake leak after the air flow meter, before replacing any parts check for loose or broken hoses and intake gasket leak. On Ford some models dirty air filter, and dirty or faulty air flow sensor are the cause of the problem.

It's a very common problem for the Ford Windstar. Here a link to a web site with information how to repair:
When is the code detected?- Fuel injection system does not operate properly.
- The amount of mixture ratio compensation is too small. (The mixture ratio is too lean.) Symptoms- Engine Light ON (or Service Engine Soon Warning Light)
- Excessive Fuel ConsumptionP0174 FORD Description The Powertrain Control Module (PCM) monitors the engine Air/Fuel mixture ratio, 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 PCM 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 PCM judges the condition as the fuel injection system malfunction and light up the engine light.

A non working speedo will not have anything to do with your ability to tune the air/fuel ratio.

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P2240 HONDA - Front Air/Fuel Ratio Sensor Bank 2 Sensor 1 IP Line High Voltage.
Symptoms - Engine Light ON (or Service Engine Soon Warning Light)
- High Fuel Consumption
- Excessive Smoke from Exhaust Possible causes - Air/Fuel Ratio Sensor Bank 2 harness is open or shorted
- Air/Fuel Ratio Sensor Bank 2 circuit poor electrical connection
- Faulty Air/Fuel Ratio Sensor Bank 2
- Inappropriate fuel pressure
- Faulty fuel injectors
- Intake air leaks may be faulty
- Exhaust gas leaks

Ok as a guess that you have a SUV and you have different air faults. if you are a DYI'er go to an auto parts store and get an error code tool. Harbor freight for $30-50. Hook it to the car and find out which sensor is it calling for. Note, you can reset the check engine light on most tools that are not the cheapest.
P1130
Air/Fuel Ratio Sensor Circuit Range/Performance Malfunction (Bank 1 Sensor 1)

P1133
Air/Fuel Ratio Sensor Circuit Response Malfunction (Bank 1 Sensor 1)

P1135
Air/Fuel Ratio Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)

P1150
Air/Fuel Ratio Sensor Circuit Range/Performance Malfunction (Bank 2 Sensor 1)

P1153
Air/Fuel Ratio Sensor Circuit Response Malfunction (Bank 2 Sensor 1)

P1155
Air/Fuel Ratio Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)

P0171 - Fuel Injection System Too Lean Bank 1
Possible Causes:
- Intake air leaks
- Front Heated oxygen sensor may be faulty
- Injectors may be faulty
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Mass air flow sensor may be faulty
- Incorrect PCV hose connection

P0174 - Fuel Injection System Too Lean Bank 2
Possible Causes:
- Intake air leaks
- Front Heated oxygen sensor may be faulty
- Injectors may be faulty
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Mass air flow sensor may be faulty
- Incorrect PCV hose connection

What Causes These Codes: Fuel injection system does not operate properly. The amount of mixture ratio compensation is too large. (The mixture ratio is too rich.) The Powertrain Control Module (PCM) monitors the engine Air/Fuel mixture ratio, 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 PCM 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 PCM judges the condition as the fuel injection system malfunction and light up the engine light. The codes is usually set when there is an intake leak after the air flow meter, before replacing any parts check for loose or broken hoses and intake gasket leak. On Ford some models dirty air filter, and dirty or faulty air flow sensor are the cause of the problem.

You don't. All modern vehicles are computer controlled with an OBD1 (1995 and older) or OBD 2 (1996 and newer) computer. If the fuel to air ratio is off it will set a code

Yes, as long as you don't change the airfilter

P0171 sets when air/fuel ratio feedback is stable after engine warm up, & fuel trim is considerably in error on the lean side.
The signal from a/f ratio sensor is approximately proportional to existing air-fuel ratio.
CHECK: system for intake leaks, incorrect fuel pressure, plugged fuel injectors, 02 sensors or coolant sensor operation.
check air fuel ratio sensors. to test main AFR sensors directly you will need a good scan-tool to test parameters.
A thorough preliminary check is important. If you take your time you may find the answer before you start playing the "process of elimination " game.
Good luck, let me know how it is going.

this code sets when air fuel ratio feedback is stable after engine warm up,and fuel trim is considerably in error on lean side;The signal from air fuel ratio sensor is approximatelyproportional to existing air-fuel ratio.

for this code suspect excessive lean condition,normal rangefor total trim is between -35% to +35%,DTC uses "two-trip detection Logic".

Check system for intake leaks,incorrect fuel pressure,plugged fuel injectors,O2 sensor or coolant sensor operation.

check air-fuel ratio sensors
to do it you need to check them with a good scanner tool.

also,check MAF sensor operation.

personally i would clean with the special spray for MAF sensor (you can get it from you autoparts store) and try a fuel injector cleaner before start spending money in shops.

hope this info can help you.