My check engine light came on after 140 miles since the last one. So I did the counting the SES blinks and this is what I got. 1 long blink, pause, 2 short blinks, 7 short blinks, 4 short blinks. So that would be code 01274 correct? I looked up the code and two different definitions. One said A/F ratio sensor 1. The other said Cylinder #4 High To Low Side Open. Someone let me know whats the def. for this code and what it means.

 

DTC P1274, P1284 A/F SENSOR 1

Trouble diagnosis name:
Air fuel ratio (A/F) sensor 1 rich shift monitoring

DTC detecting condition:
The A/F signal computed by ECM from the A/F sensor 1 signal is shifted to the rich side for a specified period.

Possible Causes:
* Air fuel ratio (A/F) sensor 1
* Air fuel ratio (A/F) sensor 1 heater
* Fuel pressure
* Fuel injector


DaveO
G35 Editor
Sport Z Magazine

 

I have noticed a good amount of smoke coming from the exhaust. This is a sypmton of a rich condition correct? Can it be from babying the car? This past 5 days I have only used the car back and forth to work and have not gotten on it at all. pretty much staying out of boost. Could this cause the car to go into this rich condition? Bigger question, should I not drive the car? Is this a common problem when going FI? What should I check?

 

I did check the car with a scanner and it is coming back 1274. But it will not display the definition for infiniti.

 

I just ran out for a spirited drive to see if that would clear up the smoke from the exhaust. It did, but even though my SES light did not come back on my obd2 scanner picked up the same code again P1274. WTH!? What could this be coming from? Could Turbonetics have gone to conservative with the tune thus making the car run rich and tripping the sensor? I looked under the hood and don't see a leak. The area arounf the fuel injectorsis dry. Anyone had this problem when they went FI or have any ideas? I'm not sure if I should keep driving the car. Could it just be a matter of fouling the plugs vs engine damage?

 

No one has thrown this code??

 

The 1274 code is for one of the secondary O2s. There is a TSB from Infiniti on this. You have to take the ECU to the dealer. Have them apply the TSB and then send the ECU back to Turboneitcs to have it reflashed again. This seems to be a common issue with Gs.

 

Could the code be defeated by further spacing out the O2 sensor from the downpipe like what people are doing when they get rid of the cats and use test pipes?

 

No the Turbonetics kit already does this.//.

 

Just spoke with Turbonetics, they said they would talk it over with a tech so that they could trouble shoot it. Hopefully the fix can be done on their end because taking just the ecu to myy dealer will require more explaining then I want to deal with.

 

Why? If you ever do have to take it in for anything, it's not like you'll be able to hide the kit.

 

Well, theres not much on the engine and trans that I will be able to take the car in for due to the kit.

 

I don't understand why a ECU reflash is necessary? Reflash to the same program or a different one? If different, what is changed? And why not use that code from the get go? Unless the TSB itself involves a reflash?

 

The TSB IS a reflash...