XC90 2.5T 2006 misfiring problem

[Dhimas Yuniarso]

DTC 30089, Fuel pressure regulator.

Tried many things but this error code keeps back ON.

Appreciate your kind help....

[vegasjetskier]

Might be the fuel pressure sensor, as indicated in the original codes, or it could be the regulator. Is there a Schraeder fitting on the end of the fuel rail so you can measure the fuel pressure? Also, you might want to check the connection to the fuel pressure sensor.

[Dhimas Yuniarso]

We have checked the fuel pressure its 6.00 instead of 4.00.
I think the fuel send more pressure than it should be.

Check engine light still on but the misfiring problem desepear.

Is that fuel pressure sensor problem or regulator?
Btw, isn't it regulator combined together with fuel pump?

Thanks,

Dhimas

[Dhimas Yuniarso]

Check engine light with DTC ECH-2900: Fuel Pressure Control valve signal to high/low.

We checked as following:

1. Check any leak in fuel system result not found
2. Check ECM result good. (check by Volvo special tools)
3. Check PEM Result (signal lower than it should)
4. Check Fuel pump result 2 motors are working and fuel pressure is higher than it should be. (6.00 instead of 4.00)

Hope the information would help.

Thanks
Dhimas

[Dhimas Yuniarso]

Dear All,

Car was fixed for some months after my last post.
Conclussion:

Replaced all plugs.
Replaced Fuel Filter.
Replaced Fuel pump.
Replaced fuel pressure sensor.

The last one need to replaced after 1st and 2nd parts changed not solve the problem.

Now car running fine.

Hope this help for future reference of other members.

Thanks and Rgds,
Dhimas