Post your ash mass and mileage! – page 4 – bimmerfest – bmw forums gas near me

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Is this no codes or no check engine light? I had soft codes for a clogged exh pressure line that did not illuminate a cel. It is possible that you have a failed/ing component that does’nt register a fault on the instrument cluster (slight vacuum leak etc). Or a failure of something that is causing frequent regenerations. Other possibilities, tires, sticking brakes, driving too slow, other changes in driving profile, etc. 19 Seems acceptable for the mileage IMO

In the past, the infamous 4D16 and a couple of related codes appeared temporarily . . . after a tussle with the local BMW dealer, managed to get them to run the diagnostics on urea/DPF system on their dime . . . it passed that test. That was 7,000 miles ago, still zero codes. Once an Active Tank level code (don’t have it handy with me) showed up, cleared the code to see if it is real, it has not returned yet. I have driven about 3,000 miles since I cleared that code.

Tires are new, checked for sticky brakes (rotors and pads are also new), one year old battery . . . I drive this car 95% of the time, same routes, about 70% city and 30% hwy . . . highway I drive around 80 mph . . . a few weeks back was in the LA area, drive back was late night . . . drove steady 90 mph . . . this thing runs BEAUTIFUL . . . like it is on rails!

Hi everyone. So I had cbu, a new dpf, all new injectors about 11k miles ago. Last month had 2 new injectors replaced. DPF code came on before injectors replaced. Indy shop cleared it. 2 days later, SES light came on and I brought it to stealership who replaced Nox sensors. It’s been fine for a couple hundred miles but I think rougher than normal idle. I checked the KTMP-Mom on my trip home tonight after reading this thread and it never got above 73C degrees. I’m a city driver mostly. I also purchased Carly last night, although I have not received it. I didn’t check the temp until today until my trip home from work. I will continue to check it but assuming there is no change, I will bring my car back to the dealership to check the gauge. B/c I’m a woman and no one at the Service Dept ever takes me seriously, is there a service bulletin or something I can refer them to?

My plan now is to have my husband drive the car and force regeneration once a week during his 45 minute mostly hwy commute assuming I can get Carly to work. I do not want to go through a carbon cleaning and new dpf again (emissions warranty expires 11/18). Car is ’11 335d, 65k miles. Also, how should I phrase my request for the Service Dept to check my dpf? I don’t want to be stuck with this $4k repair after my emissions warranty expires.

Somewhere I read bad NOx sensors cause lower mpg . . . not sure what the connection is . . . does the car run "rich" to lower chamber temp and as a result reduce NOx production? That was a WAG . . . my mpg is 18.8 mpg, which is on the low side . . . it used to be 23 mpg . . .

As for the lower MPG and more frequent regens, possibly CBU or other issue causing the engine to make a lot of soot?? More soot produced if there is an issue will lead to more frequent regens. Visible smoke from a pre-DPF diesel years ago was useful as a diagnostic tool. By paying attention to the amount of smoke, type of smoke and the conditions when it is produced, you could get an idea of what’s going on inside the engine. Now with our DPF equipped diesels, the DPF effectively "hides" all visible smoke such that it’s possible to have a smoke problem and not know it until other problems show up. Maybe give it a long hard run on the highway to help clean things up.

I’ve had the 4D16 code and had both NOx sensors and the SCR cat replaced around 165k miles. I recently started getting the 4D16 code again at 190k miles, probably due to sensor drift. I don’t think it needs another SCR cat. I’ve noticed no change in MPGs and performance and they are 100%normal. I drive my cars like I stole them so I probably would notice a drop in MPGs if it were happening.

Is this no codes or no check engine light? I had soft codes for a clogged exh pressure line that did not illuminate a cel. It is possible that you have a failed/ing component that does’nt register a fault on the instrument cluster (slight vacuum leak etc). Or a failure of something that is causing frequent regenerations. Other possibilities, tires, sticking brakes, driving too slow, other changes in driving profile, etc. 19 Seems acceptable for the mileage IMO

In the past, the infamous 4D16 and a couple of related codes appeared temporarily . . . after a tussle with the local BMW dealer, managed to get them to run the diagnostics on urea/DPF system on their dime . . . it passed that test. That was 7,000 miles ago, still zero codes. Once an Active Tank level code (don’t have it handy with me) showed up, cleared the code to see if it is real, it has not returned yet. I have driven about 3,000 miles since I cleared that code.

Tires are new, checked for sticky brakes (rotors and pads are also new), one year old battery . . . I drive this car 95% of the time, same routes, about 70% city and 30% hwy . . . highway I drive around 80 mph . . . a few weeks back was in the LA area, drive back was late night . . . drove steady 90 mph . . . this thing runs BEAUTIFUL . . . like it is on rails!

Hi everyone. So I had cbu, a new dpf, all new injectors about 11k miles ago. Last month had 2 new injectors replaced. DPF code came on before injectors replaced. Indy shop cleared it. 2 days later, SES light came on and I brought it to stealership who replaced Nox sensors. It’s been fine for a couple hundred miles but I think rougher than normal idle. I checked the KTMP-Mom on my trip home tonight after reading this thread and it never got above 73C degrees. I’m a city driver mostly. I also purchased Carly last night, although I have not received it. I didn’t check the temp until today until my trip home from work. I will continue to check it but assuming there is no change, I will bring my car back to the dealership to check the gauge. B/c I’m a woman and no one at the Service Dept ever takes me seriously, is there a service bulletin or something I can refer them to?

My plan now is to have my husband drive the car and force regeneration once a week during his 45 minute mostly hwy commute assuming I can get Carly to work. I do not want to go through a carbon cleaning and new dpf again (emissions warranty expires 11/18). Car is ’11 335d, 65k miles. Also, how should I phrase my request for the Service Dept to check my dpf? I don’t want to be stuck with this $4k repair after my emissions warranty expires.

Somewhere I read bad NOx sensors cause lower mpg . . . not sure what the connection is . . . does the car run "rich" to lower chamber temp and as a result reduce NOx production? That was a WAG . . . my mpg is 18.8 mpg, which is on the low side . . . it used to be 23 mpg . . .

As for the lower MPG and more frequent regens, possibly CBU or other issue causing the engine to make a lot of soot?? More soot produced if there is an issue will lead to more frequent regens. Visible smoke from a pre-DPF diesel years ago was useful as a diagnostic tool. By paying attention to the amount of smoke, type of smoke and the conditions when it is produced, you could get an idea of what’s going on inside the engine. Now with our DPF equipped diesels, the DPF effectively "hides" all visible smoke such that it’s possible to have a smoke problem and not know it until other problems show up. Maybe give it a long hard run on the highway to help clean things up.

I’ve had the 4D16 code and had both NOx sensors and the SCR cat replaced around 165k miles. I recently started getting the 4D16 code again at 190k miles, probably due to sensor drift. I don’t think it needs another SCR cat. I’ve noticed no change in MPGs and performance and they are 100%normal. I drive my cars like I stole them so I probably would notice a drop in MPGs if it were happening.