Greetings Everyone,

A couple weeks ago I got a Check engine light on my 05 HCH.

I've got just over 110000 on it now. Replaced the 12V battery about 10K miles ago.

I finally got a scanner and collected the following three codes.

P0139 HO2S-12 (Bank 1 Sensor 2) Circuit Slow Response

P1130 HO2S-12 / HO2S13 Signal Circuit Demand Charging

P2000 Hybrid Battery System Voltage High

I haven't reset this yet. Have any of you had any experience with these codes?

I really don't like the P2000 code. I fear high voltage could kill my HV battery.

Any thoughts would be appreciated.

Thanks in advance for your inputs.
Glen Ray

 

No replies to this yet??

At almost exactly 110k I also got the P0139 Circuit Slow Response. The second O2 sensor is the one monitoring the efficiency of the catalytic converter. This can mean one of two things - the O2 sensor is going out or the catalyst is operating less than optimum efficiency. I'd suspect the former more than the latter.

I reset mine and it never came back. Put about 2000 miles on it since then. From my experience working with performance vehicles this can be an extremely intermittent code, even when the catalyst is not present in the system on race days.

I can't speak to the other two.

jason