Hello,
I have a 2007 BMW 530d M Sport LCI.
I have noticed the engine rpm is not stable when cruising i.e. driving at a constant speed, the rpm needle on the dash moves very slightly and the car makes a slight shudder likes it's going to change gear. When I pull up at a traffic light and keep my foot on the brake, the car will move as if it's engaging gear (I have an auto gearbox).
I connected a C110 scanner and checked the engine rpm when the car is idle. It's fluctuating between 678rpm and up to 690rpm when idle.
I also noticed that I have a 452A error code and the last DPF regen is shown as 0m!
I also have an error code for a glow plug on cylinder 2 (4222).
I service this car regularly and is well looked after. I had a similar problem two years ago with the car shuddering when driving at a constant speed and I replaced the main and EGR thermostats and this solved the problem.
Now, I am worried that it is the gearbox, DPF or torque converter!
Any advice would be greatly appreciated.
Thanks.
I have a 2007 BMW 530d M Sport LCI.
I have noticed the engine rpm is not stable when cruising i.e. driving at a constant speed, the rpm needle on the dash moves very slightly and the car makes a slight shudder likes it's going to change gear. When I pull up at a traffic light and keep my foot on the brake, the car will move as if it's engaging gear (I have an auto gearbox).
I connected a C110 scanner and checked the engine rpm when the car is idle. It's fluctuating between 678rpm and up to 690rpm when idle.
I also noticed that I have a 452A error code and the last DPF regen is shown as 0m!
I also have an error code for a glow plug on cylinder 2 (4222).
I service this car regularly and is well looked after. I had a similar problem two years ago with the car shuddering when driving at a constant speed and I replaced the main and EGR thermostats and this solved the problem.
Now, I am worried that it is the gearbox, DPF or torque converter!
Any advice would be greatly appreciated.
Thanks.