P0128 & P0303 - Check engine light on on 2003 Chrysler PT Cruiser

First occurrence of issue. Cold (15 degrees F) temperature start up - saw check engine light on - and has stayed on. Used scan tool to find two DTC's P0128 & P0303. Can you determne what is wrong just from this (& what I need to do to fix it)?

by in Livonia, MI on December 20, 2010
1 answer 1 comment
ANSWER by on December 20, 2010
P0128 is likely to be a stuck open cooling system thermostat or low coolant level. P0303 is a number three cylinder misfire, check the spark plug, fuel injector and connection or vacuum leak at number three cylinder.
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COMMENT by on January 30, 2011
Yes, very cold day in Jan the code appeared