P258B fault code: what it means

P258B: Electric brake vacuum pump performance (Cherokee, JL Wrangler, Gladiator). ESC light may come on. FCA says check wiring and vacuum hoses before replacing the pump.

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

1. vacuum hose leak or loose connection
2. electric vacuum pump
3. wiring/connector
4. software

P258B by make

Not sure what P258B means on your car? Ask Credov.

Before you clear it

Write the code down or photograph the scanner first. A code that comes straight back after clearing points to a fault that is still there. A car whose codes were cleared just before you arrived may be hiding one: the scanner's readiness monitors show "not ready" for a while after codes are cleared.

Researched by Credov from manufacturer and workshop sources. A fault code points to where a fault may be; a workshop confirms it with a diagnosis. Browse all fault codes.