Question about Honda Accord
Connected car to code reader, code PO 128 appeared. 2009 Honda Accord. 32,000 miles
Po128 cooling system preformance, this can be caused by a bad thermostat or fan relay, if the fans are staying on to long and last a bad coolant temp sensor, this car uses two coolant temp sensors, the best way would be with a scan tool to watch the sensor values and see if there are ok, this being a 2009 honda with 32,000 miles , this type of problem is not seen to often. check connections to sensors and make sure wiring is ok,
Posted on Jan 16, 2013
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Posted on Jan 02, 2017
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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