P2019A error code

jlglr4

Full Access Member
Joined
Mar 19, 2019
Posts
583
Reaction score
293
Location
Northern California
I could have sworn they had a voltage readout for sensor 1, but I also can’t find it in the menu. I guess we just use the lambda reading. Should still go up and down while in closed loop. So, maybe watch those values - I think the range of oscillation is around 0.95-1.05. That very first reading of Bank 1 you posted was a zero, along with a 0% duty cycle on the heater wire. So, seems like there might be a problem there.

Something appears to be up with the bank 1 post-cat sensors, but I would zero in on the pre-cat sensor first. If that bank 1 sensor 1 is not operating, makes it hard to diagnose anything else. I’d also still take a peak at short term and long term fuel trims together for both banks as well.

Fuel rail pressure looks off compared to my last measurements, but my car might call for different pressures. Or your car might be calling for higher pressure to get whatever it wants from the fuel injectors at a given pulse width. Even at that, seems like actual should be a little closer to desired. For reference, I was seeing about 2900-3200 kPa actual and desired at idle (618 rpm) when I last checked (that’s on a 2016 scv6).
 

Mozambique

Full Access Member
Joined
Feb 26, 2018
Posts
113
Reaction score
11
Location
toronto
Still getting the 0% for O2 sensor heated duty cycle bank 1 sensor 2.
You must be registered for see images attach
 

Mozambique

Full Access Member
Joined
Feb 26, 2018
Posts
113
Reaction score
11
Location
toronto
O2 lambda values for sensor 1 look fine.
Short term fuel trim bank 1 seems to show widest fluctuations
 

Attachments

  • Screenshot_20210829-141743_IIDControl.jpg
    Screenshot_20210829-141743_IIDControl.jpg
    55.7 KB · Views: 2
  • Screenshot_20210829-141737_IIDControl.jpg
    Screenshot_20210829-141737_IIDControl.jpg
    55.4 KB · Views: 2
  • Screenshot_20210829-141652_IIDControl.jpg
    Screenshot_20210829-141652_IIDControl.jpg
    55.8 KB · Views: 2

Mozambique

Full Access Member
Joined
Feb 26, 2018
Posts
113
Reaction score
11
Location
toronto
Have found Bosch upstream O2 sensors at a reasonable price. Plan is to replace those, then see and replace downstream sensors if needed as next step.
Thank you SO much for your help!!
 

Mozambique

Full Access Member
Joined
Feb 26, 2018
Posts
113
Reaction score
11
Location
toronto
Update!
Have been trying to find time to put the new upstream O2 sensors on. Then after a month or two of being on, the CEL went off!! Either the bulb expired, or the fault self-fixed. Win-win regardless!! :)
....... waiting for it to come back on :(
 

Latest posts

Members online

Forum statistics

Threads
34,775
Posts
202,473
Members
28,417
Latest member
Colterrgeist
Top