Question about 2004 Dodge Caravan
I have obd code ,171, 406, 138 an my caravan gets hard to start after i shut it off for more than 20 minutes?
On youe veicle you have to follow procedures to check O2 sensors
voltage to high more than 3.7 volts
circuit shorted or O2 sensor is no good thats for code 138
code 171 contaminated O2 sensor
406 is your EGR system shorted open thats whats probably causing your O2 sensors to contaminated fix the EGR and clean passage way to intake
Posted on May 08, 2010
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Posted on Jan 02, 2017
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