P0025 fault code: what it means

P0025: Bank 2 exhaust camshaft over-retarded (V engines).

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

low or sludged engine oil
sticking exhaust VVT solenoid
worn cam phaser
stretched timing chain

P0025 by make

Lexus

Exhaust cam timing over-retarded, bank 2 on a Lexus V6/V8.

Usual causes: low or sludged engine oil; sticking exhaust OCV bank 2; worn exhaust cam phaser; stretched timing chain

Mercedes-Benz

Bank 2 exhaust camshaft timing over-retarded. On M272 V6s this is often linked to balance shaft or chain wear.

Usual causes: worn balance shaft sprocket (early M272); stretched timing chain; faulty camshaft adjuster

What the repair usually costs

Timing chain, tensioner and guides (4-cylinder)NZ$1,120–NZ$2,530 · A$1,160–A$2,570
Timing chains and tensioners (V6 / V8)NZ$1,890–NZ$4,080 · A$1,920–A$4,110

Not sure what P0025 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.