P045B fault code: what it means

P045B: SKYACTIV-D 1.5 low-pressure EGR valve control circuit fault. LP-EGR is disabled; may come with DPF problems.

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

LP-EGR control valve motor
wiring fault
carbon sticking the valve

P045B by make

Mazda

SKYACTIV-D 1.5 low-pressure EGR valve control circuit fault. LP-EGR is disabled; may come with DPF problems.

Usual causes: LP-EGR control valve motor; wiring fault; carbon sticking the valve

What the repair usually costs

A/C compressor replace incl. drier and flush (European)NZ$1,560–NZ$3,200 · A$1,490–A$3,050
EGR valve replacement or cleanNZ$350–NZ$1,710 · A$330–A$1,630

Not sure what P045B 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.