Drivable short-term, but fix now to avoid damage.
This code means the engine computer sees a high signal or high voltage on the 'B' fuel metering control circuit of the diesel injection pump. It typically points to an open circuit, a short to power, or a failing metering valve or pump electronics. Fixing it usually starts with inspecting the wiring and connectors, then testing the pump's control components if the circuit checks out.
$250 – $1800
Varies by vehicle and root cause.
You may manage short distances, but it's not wise to keep driving on it. A high metering signal can cause rough running, power loss, and even a no-start. Get it diagnosed soon, and if the engine is struggling or in limp mode, head to a shop right away.
Wiring and connector repairs are often a few hundred dollars. If the fuel metering valve or injection pump must be replaced, the bill can reach roughly $800 to $1,800 with parts and labor. A diagnosis pinpoints the cause so you don't overspend.
Yes, it's a serious code since it affects fuel delivery from the injection pump. Left unaddressed, it can leave you stranded with a no-start. It's worth fixing promptly even if the car still moves.
It means the voltage on the metering control circuit is higher than expected, usually from an open wire or a short to power. That's different from P0259 ('Low'), which signals voltage that's too low. The reading helps the technician focus the wiring test.