P1805 fault code: what it means

P1805: Stop lamp (brake) switch circuit fault. Brake lights, cruise control and push-button start may misbehave.

Engine and gearbox (powertrain) · Minor

Usual causes, most likely first

stop lamp switch faulty or misadjusted
wiring or connector fault
stop lamp fuse

P1805 by make

Nissan

Stop lamp (brake) switch circuit fault. Brake lights, cruise control and push-button start may misbehave.

Usual causes: stop lamp switch faulty or misadjusted; wiring or connector fault; stop lamp fuse

What the repair usually costs

Smart / proximity key supply and program (push-button start, sublet locksmith)NZ$430–NZ$960 · A$320–A$760

Not sure what P1805 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.