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Showing posts with label vw error code p0171. Show all posts
Showing posts with label vw error code p0171. Show all posts

Saturday, January 19, 2013

Chrysler Van System Too Lean Bank 1

OBD Error Code P0171 On Chrysler Van


Chrysler Van will not Start 



The starter turn over right but Engine will not start and Error code P0171 comes up.
n these case first see if you could hear the fuel pump turning ON when you crank/ start the engine.

Normally when you turn the key to start and start to Run you hear fuel pump running noise for 1-2 seconds.Hear that noise.If that fuel pump start noise is not heard then its fuel pump start up failure.

NOW why these code P0171 gets set:----


Engine running rich or Engine running Lean all is controlled by PCM.
The powertrain control module (PCM) has control and ability to watch the upstream oxygen sensors to know how rich or lean the engine is running. It has the ability to compensate for rich or lean conditions up to an extent. Suppose if the PCM detects Engine running lean, then in that condition it will start adding more and more fuel to try to bring it back to the correct range. It can add up to about 33% more fuel, and if it still can't bring the ratio back into the correct range then it will set this fault code. This could be a bad upstream oxygen sensor or MAP sensor, fuel quality issue, but in your case it was most likely caused by low fuel pressure.So first get the fuel pressure tested,these will help to confirm the problem.

As per our Auto garage repair experience ,With code P0171  set and you not hearing the pump run plus a no start condition is pointing to a likely fuel pump failure.
So first check fuel pressure,then check for power and ground at the pump connector while a helper cycles the key on and off or cranks the engine. If the pump does have power and ground but won't run then it will need to be replaced.If the pump has power but pressure is less then also pump is faulty.Also it can be faulty fuel pump relay,as power is not there.

The fuel pump relay is located in the box under the hood which you could try swapping with another and see if that helps but it's unlikely. Relays very seldom fail.

To measure the fuel pressure the simple procedure is as follows :--


Remove the fuel line from the rail and install a T hose inline and then attach the fuel pressure gauge to the T hose. There isn't a test port on the fuel rail itself on your Chrysler Van model.

Many a times confirming the fuel pump start up noise becomes very difficult.In that case take the help of helper.




As per Chrysler Van the pump connector is easily accessed, it clips up to the frame right behind the fuel tank located towards the center of the tank area.

With the chime going off when turning the key on it can be tough to hear the pump. It would be best to have a helper back near the tank or a helper turning the key while you listen back there.

For mode help and information regarding fuel pump connector ,There are four wires in the connector. The one to be checked are black/light green which is ground, and the fuel pump driver wire is dark blue/orange.

These details will help.
Thanks.





Users Who Viewed This Problem Also Viewed:

2000 Toyota Celica: Still Getting OBD code P0171? 

http://howtobyme.blogspot.in/2012/05/2000-toyota-celica-still-getting-obd.html


2003 Chrysler Town & Country: OBD Code P0171?

http://whatisbyme.blogspot.in/2012/06/2003-chrysler-town-country-obd-code.html

1999 Toyota Tacoma: Check Engine Light Read Code P0171?

http://whatisbyme.blogspot.in/2012/05/1999-toyota-tacoma-check-engine-light.html




What to Do When Car Turns Over But Won't Start?
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Car Starting Problems




Wednesday, October 12, 2011

Code P0171 on VW Jetta?

PLEASE HELP.
THERE WAS CHECK ENGINE LIGHT ON MY VW JETTA.I SCANNED FOR CODES AND THE STORE GAVE ME THE CODE P0171.
BUT WHAT DOES THIS CODE MEAN.
MY VW JETTA IS 2002 AND ENGINE IS 1.8.

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OK.



The P0171 lean code usually causes folks to immediately replace the air mass meter.
But in most of cases on 1.8T engine, there is a vacuum/manifold/boost leak of some sort problem.
I suggest having the intake system completely smoke tested, and repair any leaks you find
Also, the turbo diverter valve can cause this, if the diaphragm inside of it is ruptured
and sometimes, failed crankcase ventilation hoses can do the same.

This possibilities are to be checked.
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THANK YOU.
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For more car related problem troubleshooting:---

This are the sections, you can go through and click the link to read its troubleshooting.

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http://schematicsdiagram.blogspot.com/2011/06/how-to-test-starter-solenoid.html

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http://schematicsdiagram.blogspot.com/2011/06/how-to-test-cars-starter.html

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