High LTFT and Low STFT with lean P2187 code on RR Velar.

[nac9]

Hey Guys, can you suggest what can be the problem with my 2019 2.0L Petrol Velar? I am getting an LTFT of around 25 and above and an STFT in the range of ±10. I am also getting P2187 (too lean at bank 1) error. I am also getting 12-13 mpg in city and 16- 18 mpg on the highway, which is way too low.

I checked the O2 voltage, MAP, and MAF sensor readings on the OBD, and they seem to work within the normal range.

Please suggest what can be the problem. Thanks.

 

[Rover Range]

More than likely. The engine breather box diaphragm is leaking.
On the round cover, there's a port on the bottom. With the engine running, put your finger over the port and feel for a vacuum. If there's vacuum, the diaphragm is leaking.

 

[nac9]

More than likely. The engine breather box diaphragm is leaking.
On the round cover, there's a port on the bottom. With the engine running, put your finger over the port and feel for a vacuum. If there's vacuum, the diaphragm is leaking.

View attachment 25324

Yes Sir. I checked there is a small hole there and its sucking air from there. When I put my finger on it the engine vibrates a bit. Can you please tell me is this the problem for High LTFT and how to solve it ??

Should I buy this part and change it : https://parts.landrovercary.com/oem-parts/land-rover-vent-cover-lr182553 srsltid=AfmBOopSRnmlAOLl4g7zoLef9BXM9xA5kjwfSvWZLucdNUwZLsTzBucs

Thanks for your fast reply (and a reply with the image).

 

[Rover Range]

You have a vacuum leak.
That affects the fuel trims, as the PCM is trying to compensate.
Change out the breather box. Also reset the PCM adaptions.

 

[nac9]

I changed the breather box and yes there is no suction from that small hole now. My LTFT is also close to zero.
Thank you so very much again for your help. Means alot.

 

[Rover Range]

Sweet.
Glad I could help.

 

[nac9]

Sir, can you please suggest any coolant/antifreeze compatible with my car for topup?
Eg. Dexcool...
I have attached images (color of coolant) for your reference.

Thanks again.