P090C Ford Auto Trouble Code. P090C Ford Auto Trouble Code on vehicles with electronically controlled automatic transmissions, the 3-4 shift solenoid is responsible for actuating the hydraulic circuits to activate clutches or bands that change gears inside the automatic transmission. Jan 15, 2010 Hi Clive, the focus convertible has a hard top roof that folds in 2, the roof & rear screen fold over each over & the boot lid raises up to allow the two parts to load into the boot space above a cover which has a sensor fitted to it, if this cover is not closed the sensor tells you on the display screen, I believe the roof is electrical, that's all I can tell you so far, it's raining to day.
Ford Error Codes Sensor Circuit
P0171 FORD 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
First diagnose P0171 FORD 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 terminals.
P0171 FORD Tech Notes
If the P0171 is combined with the P0174 code, it's very likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replace the air filter and clean the air flow meter. If the problem persistss the front oxygen (O2) sensor may need to be replaced.
It's a very common problem for the Ford Windstar. Link to a website with information on how to repair: 1999-2003 Fords Windstar Code P01712004 FORD F150 P0171, P0174, P0301, Misfire and Lean Condition
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Cost of diagnosing the P0171 FORD code
Labor: 1.0
The cost of diagnosing the P0171 FORD code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.When is the P0171 FORD code detected?
- Fuel injection system does not operate properly.- The amount of mixture ratio compensation is too small. (The mixture ratio is too lean.)
P0171 FORD Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Excessive Fuel Consumption
P0171 FORD Meaning
With 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 (Ford Error Codes P1000
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 Malfunction Indicator Light (MIL) (2 trip detection logic).
P0171 FORD More Information
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