P0170 code I've had 3 different codes in succession. first was a right bank fuel balance second is P0170, bank 1 trim that was traced to a leaking throttle body gasket that was then replaced (for second time). third code is P0400, which the dealer traced to a new, aftermarket hose that they put back on "as best as possible", charged me $122 and the light was back on before I got home (the hoses were all on tight when I checked them at that time). Major question is how are these codes connected? And what can I do to fix the problem because I cannot afford these costly bills that fail to fix the problem.

Marvin

• 85242 Answers
• Posted on Sep 09, 2008

SOURCE: My check engine light is

Bank 1 is the converter on the side that engine cylinder one is on. Yes that is true about the converter, the computer is programmed for a certain value, an aftermarket cat will not meet that value and the check engine lite will be triggered.

Harvey N Tawatao

• 3854 Answers
• Posted on May 02, 2009

SOURCE: CHECK ENGINE LIGHT ON CODE P0170

DTC P0170 applies to fuel trim malfunction on all 2.4L vehicles, 3.0L Federal vehicles and right bank (bank 1) on 3.0L California vehicles. 
DTC P0173 applies to fuel trim malfunction on left bank (bank 2) on 3.0L California vehicles.
DTC Set Criteria (2.4L)
Engine is in closed loop control. Intake air temperature is more than 14°F (-10°C). Barometric pressure is more than 11 psi (76 kPa). Volume Airflow (VAF) sensor output frequency is 88 Hz or more. Code will set if long-range fuel correction is less than -12.5 percent, or more than +12.5 percent, for 5 seconds and short-range fuel correction is less than -10 percent, or more than +10 percent, for 5 seconds. 

Engine is in closed loop control. Intake air temperature is more than 14°F (-10°C). Barometric pressure is more than 11 psi (76 kPa). VAF sensor output frequency is less than 88 Hz. Code will set if long-range fuel correction is less than -12.5 percent, or more than +12.5 percent, for 5 seconds. On 2.4L code will also set if short-range fuel correction is less than -15 percent, or more than +15 percent, for 5 seconds. On 3.0L Federal code will also set if short-range fuel correction is less than -13.5 percent, or more than +13.5 percent, for 5 seconds. 

Have the O2 Sensor changed on the Right Bank, ( passenger side of the Engine, or where the # 1 cylinder is.)
Good luck and hope this helps

SOURCE: i have a 2000 eclipse p0170 code

o2 sensors are back if they have alot of carbon build up.

SOURCE: I get an engine light and problem code "Fuel Trim

I would try thermostate and make sure engine is getting to proper operating temp..

SOURCE: I have 2000 mitsubishi mirage.

Hi,

That code typically comes on due to an air leak, clogged fuel injectors, clogged fuel filter, or even a bad mass air sensor. I have answered other questions from people with similar problems, and some have had luck simply using a fuel injector cleaner with a full tank of premium gasoline. I've had good luck with STP Complete Fuel System Cleaner, available at most auto parts stores. I would also recommend you replace your air filter.

If your light had turned off, there really isn't much any mechanic can do, though you can ask for them to check for any air leaks in your intake system. But if your light comes on again and stays on, the problem probably is with your mass air sensor, and would probably need to be replaced.

Let me know,if needed further assistance.

Hope i helped you.

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