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Discussion Starter · #1 ·
I have this code come up every now and then. It hasnt posted a CEL yet but its in there when I sometimes check it with a scanner tool. I googled it to death and can only find one thread that says its a camshaft actuator on an Audi. Anybody have any insight.

Thanks,
Scott
 

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Since it hasn't posted a CEL, I wonder if it's maybe normal? Maybe they knew it would throw this code now and again and have the CEL set to ignore it. My best guess.
 

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Did autozone do the scan or do you own the scanner? I've been in some Advance stores to have them do a scan and sometimes they use the more sophisticated scanners with all the bells and whistles, might be worth a shot.
 

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The service manual states:

Conditions for Setting the DTCDue to aging and poisoning of the sensor element, the characteristics could change and have to be monitored. Therefore, a self diagnosis is implemented within the sensor control unit which is determining a measurement deviation in relation to a reference point defined during sensor production.

P11D7 The NOx sensor control unit sends a unique message to the ECM upon the self-diagnosis being aborted. The number of aborts is tracked by the ECM. If the number of self diagnostic aborts exceeds a threshold, the DTC is set.

P22FE The NOx sensor self diagnostic result is received from the NOx sensor control unit and stored in a ring buffer, which takes the average of the last calibrated number of test results and averages them for comparison to an upper and lower calibrated threshold. If the average result is greater than or less than the calibrated thresholds, a NOx sensor self diagnostic fault will set.
 

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Chevrolet Customer Assistance Representative
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Hi Sparky,

Thank you for bringing this to our attention and we realize how frustrating this may be. Sorry that you're getting this code on your Cruze at such low mileage. If you'd like for us to reach out to your dealership to speak with them further about this instance please let us know. Feel free to send us a private message if you'd like any assistance with this situation.

Amber N. (assisting Jackie)
Chevrolet Customer Care
 

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Discussion Starter · #13 ·
Probably has a bad NOx sensor. I would think it would be an easy fix under warranty. Are you getting any other messages ? Diesel exhaust quality poor message ? ULSD is the only fuel this emission system will accept. It knows if the DEF fluid is being altered also.
 

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Finally had a chance to take the car into the dealer yesterday. With the CEL stuck on all the time, the service advisor starts her up and tells me it is idleing funny and doesn't sound right (duh, it's a diesel). They had the car for a half-day and were "unable to detect problem at this time". They reset the CEL code which was P11D7 - "found a history code for NOX sensor after diag could not duplicate the code. Test drove the and the system is working great. Thank you".

Less than 6 hours after leaving the dealership the CEL is back on again! So basically I wasted most of my day for them to clear the CEL and not much else other than assurance that the car is brand new and they don't know what they are doing (yet).

Only the CEL is coming on. No other messages are present. Appears to be emissions related because the engine is running great.
 

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Discussion Starter · #16 ·
I dont know why they didnt at least order a Nox sensor. It is a controlled part so it takes a little time to get. I believe there is no danger in driving the car. I think it just puts the exhaust fluid at full flow because it doesnt know how much the levels are being reduced. Maybe someone smarter could verify that.
 

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I suggested possibly of ordering/replacing the NOX sensor and they seemed very reluctant because it was "too new" with not enough miles to go bad. They also kept calling it an oxygen sensor.
OMG Such a confidence inspiring service department.
 
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I suggested possibly of ordering/replacing the NOX sensor and they seemed very reluctant because it was "too new" with not enough miles to go bad. They also kept calling it an oxygen sensor.
Have you reached out to customer service on this forum? They are pretty good about getting things resolved.
 
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Well thanks diesel! :biggrin: You are correct. Anyone with any questions or needing assistance with an issue can sends us a private message and we will assist. Happy holidays from the both of us.

Jackie and Erica
Chevrolet Customer Care
 
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