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Old 09-04-2025, 08:01 AM   #8
blue62
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Join Date: Aug 2018
Location: Woodland Wa
Posts: 1,313
Quote:
Originally Posted by BoxsterInTheSun View Post
Super helpful. Couple of updates...

I got a P1119 ( Oxygen Sensor Heating ) code, not sure if that helps point us in a certain direction here.

I also ran the live data function on my code reader and watched the voltages of the O2 sensors and recorded the lows and highs to see if they were in the expected ranges:

O2B1S1: Low = 0.080 / High = 0.720
O2B1S2: Low = 0.655 / High = 0.765

O2B2S1: Low = 0.175 / High = 0.730
O2B2S2: Low = 0.590 / High = 0.665

Not sure if any of this is helpful...
That code is telling you that there is a problem with the O2 sensors heating circuit.
So it is either the sensor it's self, a resistance problem in the wiring harness, a bad connection,
or a problem in the DME.

An O2 sensor has to be at around 650 Degrees F. to function.
That's what the heating circuit is all about.
Older style O2 sensors were heated via the exhaust...so they took a while before they started to function and create feed back to the ECU.
Modern day sensors begin heating as soon as you turn the key on via the heating circuit.
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