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Discussion Starter · #1 · (Edited)

I have a 2004 Acura EL 145k Km
I first started noticing Higher than normal fuel consumption
Few weeks later got error code
P0134 - 02 Sensor Circuit No Activity Detected (Bank I Sensor 1)
I cleared it
Then I checked with an OBD reader app and I see readings for "Volts Bank 1 sensor 2" and "O2 Sensor1 Equivalence Ratio(Alternate)" (<No idea what that is) but no readings for "Volts Bank 1 Sensor 1"
The p0134 code hasn't returned
If I disconnect the sensor through the connector I do get
P0135 - Oxygen O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)

I see the Short term Fuel Trim is pretty high 25ish usually or 50 on highway. I read this should be single digit.
Replacement o2 sensor NTK 24664 = $316

Does anyone have an OBD2 reader / app that can check on their car if they see "Volts Bank 1 Sensor 1"?
Any other suggestions on how to troubleshoot before I have to change the front o2 sensor?
Or what the issue might be and why

Any help would be appreciated.
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