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Engine code 171 - 1999 BMW 318 ti

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Ensure there are no wiring faults from the Digital Motor Electronics (DME) to the throttle motor using a break out box.
If the wiring is not faulty then replace the throttle motor, then clear the DME adaptation values.
Switch off the ignition for approx 30 seconds.
Turn on ignition and delete DME adaptations and fault code memory.
Push down on the accelerator pedal four times to wide open throttle.

Posted on Aug 04, 2010

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SOURCE: trouble codes 171, 174, 137 & 401 came on after engine replacemen

did they ever reflash the ecm with the new codes for the motor

Posted on Mar 09, 2010

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I have two engine codes 171 and 174 engine is running fine how do i repair them


Well code 171 is telling you the fuel mixture is too lean for bank one and code 174 is too lean bank two.
So the most common cause is low fuel pressure.

Apr 12, 2015 | 2004 Chrysler Crossfire

1 Answer

Code 171


According to the page I found at Toyota, it's a "Random cylinder mis-fire" - meaning it is not happening consistently. Here is the site for the code 300: http://engine-codes.com/p0300_toyota.html.

Also according to the same site, on this different link, is your code for the 171 which states that it is a " fuel mixture system being lean on bank one" of your engine. The site goes on in substantial detail in both cases to tell you what the cause could be and how to fix them. Best of luck with it, hope you can do it yourself. Here is the other link: http://engine-codes.com/p0171_toyota.html

Jun 15, 2014 | 2010 Toyota Corolla

1 Answer

Need help with codes 300, 301, 306 and 171


Well code 300 is a random miss, 301 is for cylinder 1 and 306 is for cylinder 6. Code 171 is saying the fuel mixture on bank one is too lean. And that could cause the other codes.
Have you checked fuel pressure and the filter ?

Jan 31, 2014 | 1999 Toyota 4Runner

1 Answer

2006 xj8 code po 171 engine light is on


Lean report from right side bank #1 oxygen sensor

Replace both sides upstream sensors if over 100,000 miles

They slow down & set a mil lamp

Leave the rear monitors

Dec 02, 2012 | 2001 Jaguar XJ8

1 Answer

Trouble codes 171, 174, 137 & 401 came on after engine replacemen


did they ever reflash the ecm with the new codes for the motor

Mar 09, 2010 | 2004 Mitsubishi Endeavor

2 Answers

Code PO 171


http://www.automotiveforums.com/t473813.html

PO 171 is a system to lean code. This link will explain why this is and how to fix it,

Mar 02, 2010 | 1998 GMC Sonoma

1 Answer

Check engine light on computer codes 171 174 171-HEGO sensor unable of snitch cylinder bank #1 fuel system at adaptive limit (1990 on) code 174 hego sensor snitching too slow, cylinder bank #1 (1990)


switch, we run off snitches. 171 174 banks 1 & 2 Lean. Most likely cause are Upper Intake Manifold Gaskets, failed seals. It's not 1990 on. It's 1996 and on OBD2.

Aug 03, 2009 | 2003 Ford Explorer Sport

1 Answer

Codes #171 & 174


first check out for o2 sensor if its faulty this can show up.but if its proper.Evaporative emission control system leak very small 171 System too lean (bank 1) 174 System too lean (bank 2) 

Jan 05, 2009 | 2004 Ford F150

1 Answer

Check engine light comes on


I looked up code 171 and found 'system lean bank one' Sounds like a fuel injection sensor. countrycurt0

Aug 28, 2008 | 1999 Plymouth Breeze

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