Car Questions
RepairPal is your advocate for car care advice and guidance

Code PO128

(2005 Chevrolet Trailblazer)
in Appleton, WI on March 12, 2013
I replaced the coolant temp sensor. I am still getting a PO128 code. I tested the sensor and it tests good. The gauge reads 200. What else could be causing the code?
Displaying 1 answers & 1 comments
Popular Answer
on March 12, 2013
Did you replace the thermostat as suggested before? You say temp. reads 200 but is it constant while driving down the road? Unless you have a REAL scanner a DVOM and the savvy to use them, get a mechanic to have a look. Circuit or ecm problem, will have to be tested.
on December 09, 2013
I have same problem. Always get same code. Now have intermittent starting problems and no mechanic around can seem to find the problem.
RepairPal estimates are guaranteed at over 2,000 quality certified locations nationwide. Learn more

Similar Questions

View answers to similar questions from RepairPal's community of auto experts and enthusiasts.
I have a 2004 Honda Civic Ex. Error codes are: PO134 PO107 PO113 PO135 PO128 I need to get an oxygen senso...
starts better but still some time it act like it don"t want to. code po327 &code po128 is on
Didn't find what you were looking for?