Question about Cars & Trucks
Po 171 Code Only After Extended Idling, Cold Weather With Heat On High, Looks Like Engine Is Not Heating Up Fast Enough?
Code p0171 refers to system too lean-bank 1===causes --intake /exhaust leak---AIR system MAF/VAF sensor--fuel pressure /pump/ regulator---injectors--HO2S IF the thermostat working ok then the engine will get hot enough up to 85 degrees minimum. May be you have an air lock in the coolant system or the heater control is not opening the flow control to the heater core properly
Posted on Jan 01, 2014
transmision shifts are based on engine load imputs a 171 and 174 refer to a lean condition therefor the shift is being based on an assumed cold engine so yes it may be related
Posted on Apr 23, 2009
P174 means Oxygen sensor was slow in switching Single, Right
or Rear HO2S - Fuel control
P171 means Oxygen sensor not switching - system was at adaptive limits - Single, Right or Rear HO2S - Fuel control
for a comprehensive code listing for your car.
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Posted on Jan 08, 2010
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