2003 Chrysler Town & Country: OBD Code P0171?

Check engine light code P0171.
This code says p0171 fuel system lean, bank 1 sensor 1.

The Sensor has to be replaced.


The most probable reason for this trouble code is a faulty oxygen sensor.
But before directly replacing O2 sensor i recommend to make sure there is no vacuum leak and also check wiring to the B1S1 O2 sensor.If all this checked ok,then replace the sensor.
Make sure to use a genuine Mopar oxygen sensor as I have seen too many troubles with aftermarket O2 sensors .Use quality parts and branded parts.

For you help:------
Bank 1 is the rear bank, closer to the firewall
Sensor 1 is the upstream O2 sensor ( in the exhaust manifold), that is before catalytic converter.

This details will help.
Thanks.

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1999 Toyota Tacoma: Check Engine Light Read Code P0171?

The DTC / OBD II code P0171 basically indicates and means  System to lean on Bank1 Sensor.

In All it says that engine is running too lean. This basically means there's not enough fuel being metered for the amount of air being measured. The most common problem for this code is usually related to the mass airflow sensor being contaminated. The tiny resistor wires get contaminated with dirt and grit and this insulates the sensing ability and causes the system to run lean. Usually the sensor wires can be cleaned once the mass airflow sensor is removed and then spray mass airflow sensor cleaner or brake cleaner into the tube and blow dry. The other thing that needs to be checked is intake leaks any vacuum lines or intake leaks will cause the system to run lean.

This will help.
Thanks.

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FREE Car repair guide? 
http://technoanswers.blogspot.in/2012/03/car-repair-guide.html 

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