2003 Cadillac CTS error codes. (Engine Indicator Lights Cadillac CTS)

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Question Details Asked:Jan 08, 2013 - 12:49 PMStatus:Closed

Edmunds Visitor	2003 Cadillac CTS error codes. I bought this car new in 2003 and never had a problem, but lately my engine light has been on and my battery keeps going dead. I put it on a scope and found po154 (a problem in 02 circuit with no activity detected (bank 2, sensor 1). Also po128 coolant thermostat (coolant temp below thermodynamic reg. temp)? Any one got any ideas? Thanks.
	In Maintenance & Repair > Engine > Indicator Lights In Makes & Models > Cadillac > CTS 1 answer - 133 days ago
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Answers

ray80 01/08/13 4:40 pm PST

For the P0128, hows the heater working, cooler then expected or perhaps temp (if equipped) a little low?

For the assortment of stuff, how old is battery? The electronic can be sensitive to shaky battery condition (of course they could be true codes also)

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