: If draining the water doesn't work, replace both the primary and secondary fuel filters. This is often the "quick fix" for most pressure-related codes.
: Water or debris in the fuel tank can quickly overwhelm filters and lead to pressure drops. valtra error code l302 link
Valtra Tractor Error Codes Guide | PDF | Clutch | Throttle - Scribd : If draining the water doesn't work, replace
The lift pump may not be delivering the required flow rate (e.g., 3 liters per minute for certain T-series models). valtra error code l302 link
Are you also experiencing issues with the or PTO ?
: Visually inspect the mechanical linkage for any signs of wear, damage, or incorrect adjustments. Make any necessary adjustments or replacements.