P3191 fault code: what it means

P3191: Engine does not start on a Lexus hybrid: the hybrid system cranked the petrol engine but it did not fire. Car may run on battery, then shut down.

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

ran out of fuel or fuel pump fault
dirty throttle body / MAF sensor
ignition coil or spark plug faults
immobiliser or ECM fault

P3191 by make

Lexus

Engine does not start on a Lexus hybrid: the hybrid system cranked the petrol engine but it did not fire. Car may run on battery, then shut down.

Usual causes: ran out of fuel or fuel pump fault; dirty throttle body / MAF sensor; ignition coil or spark plug faults; immobiliser or ECM fault

Toyota

Engine does not start on a Toyota hybrid: the hybrid system spun the petrol engine but it did not fire. Car may drive on battery only, then shut down.

Usual causes: ran out of fuel or fuel pump failure; dirty throttle body / MAF sensor; ignition coil or spark plug faults; low compression or carbon build-up (high-km 1NZ/2ZR)

What the repair usually costs

MAF (mass air flow) sensor replaceNZ$170–NZ$660 · A$160–A$600
Throttle body clean and idle relearnNZ$90–NZ$190 · A$100–A$200
Electronic throttle body replaceNZ$470–NZ$1,290 · A$440–A$1,190
Coil packs and spark plugs (4-cylinder)NZ$280–NZ$1,000 · A$260–A$920

Not sure what P3191 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.