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I had a long list of codes, cat error was in there but I did not believe it. So I checked everything else. Again, the test that convinced me was...
Yes. I agree it may not be the engine power in this case. However, the original symptom did include low engine power and the error codes matched...
The battery that kept draining was the hybrid battery. Checked it thoroughly for cell voltage and it was fine but drained very quickly on hills....
I had a similar problem - the battery kept dying. The car through tons of trouble codes and you could really see the battery drain on hills and at...
