P0152 CEL-common causes with our cars?

Sometimes the O2 ECU gets moisture in it thru the sealant and causes crazy issues. I replaced both of mine not long ago. Cheap part... about $250 or so...worth a shot.

 

From my ws manual query

High Voltage (max)

1-Check The wiring
2-Check the signal (0.97-1.05)
3-Check injectors and wiring
4-Check ignition coil and wiring
5-Check engine CO HC emission base HC<250 ppm CO<l.l%

Not sure what u did for the prior slow down issue. Which bank was having the problem and what exactly did u do? What is a gothspeed?


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Good to know about gothspeed. I thought it was a work around for the slow down issue.

Did u do a hard reset after the ecu change?

Sounds to me like you may have an air/fuel issue. ? Cause

Any other ( or pending ) codes? p1125 or p1126?



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Did turn off the power with the cut off. From my limited experience, a cut off hard reset is recommended when stuff like this done.

You don't have anything like a minicat or extender connected to the upstream sensor? (Don't be insulted had to ask)

To me seems like your options are:
-take it to someone with a Leonardo and see if a proper Diagnosis can be rendered.

-if that's not in the cards... I'm not a pro but this is what I'd do.

I'd check the data from that sensor using my smartphone OBD reader, and compare sides and to downstreams. I'd be interested to see data for the bank 2 downstream compared to upstream especially when cold.

I'd swap coils left to right banks, and see if the problem follows them. I agree there should be other codes like misfire etc, but so simple I would try it.

Replace plugs

Consider swapping ecu's and see if problem follows.

Remove injectors and send them out for cleaning, can be done pretty inexpensively.

I believe High voltage would occur from a excessive O2 at the sensor (assuming all components are functioning normally). So what would cause this?

-lean condition: vacuum leak, intake manifold leak, air leak after the MAF, dirty or problem injector giving inadequate fuel.

-exhaust manifold leak/crack.

-incomplete combustion - spark plug or coil

This is my simple minded list, I'm sure someone will add/correct.


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Do you have a way of monitoring the Upstream O2. Sensor should stay flat at idle and move up and down with snap throttle inputs. If it is stuck at high voltage you could have a lean condition (too much O2) or possibly an open in the wiring since you replaced the sensor. Did you use the correct O2 sensor? Also how did you check for exhaust leaks? You need to use a smoke machine with the engine cold (a hot cat will absorb the smoke) to do a definitive test. Look at your fuel trims on that bank, are they high (+10 % or more)? One last thing since it's free, do a hard reset, shut off the electrical system for a min. of 30 minutes and then perform the reset. See if the O2 comes back to life. Fix the issue or you will destroy your cat. $$$$$$$

 

Do you have the yellow ODB module off Amazon and the software from Mechanic66 ?
It can read all the codes for Engine ECU & TCU.

I had a bad connection in the connector on the upstream O2 that was hard to find.

I actually purchased a replacement O2 sensor just to have a good reference for testing and that's how i found the connector problem when i was swapping them in and out.

You can also ohm test the heater circuit on the 02, but be careful not to touch any other pin.

I think we have the ECU pin out drawing floating around, so you could buzz from the connector (O2 end) to ECU connector to see if the wiring is good.

 

the ODB/Software i mention above, should be able to show the actual voltage and lambda value of the O2 sensor in the "monitor parameters" page.
I'll check tonight to make sure it can.

My Leo can certainly do this.

I think that would give you the best visibility to the issue.

 

Do you know which one it is as my iPhone app doesn't read the Tx codes. Thanks.

 

Here it is....
https://www.amazon.com/gp/product/B01GCIBYK8/ref=oh_aui_detailpage_o04_s00?ie=UTF8&psc=1

For 360 it does not set PIS at this time.
But for reading codes and reading parameters it works.

 

Remember
Once you get it and install the free App. (which does not show Ferrari)
You must pass the serial no. and other details to mechanic66 for him to work his magic.

 

Angus, who is this mechanic66?

 

It's great that you can read tcu data. But if you would like ecu (x2) data including ability to see live ecu data you can get the
EOBD-facile app (like 7 bucks for full version). I have an inexpensive wifi OBD connector <20 bucks. Works great.


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