ok so ive had a problem with my engine management light wont go out reduced power lumpy that sort of thing been to the garage an the only codes they could not turn off were
p1120 throttle position sensor low input
p1550 reduced power

the garage told me i needed a new throttle pedal as the sensor was knackered so changed it (bloody expensive to) with no improvement went back to the garage thinking the codes just needed clearing but yet again those 2 codes wont turn off...the garage is out of ideas without keeping my car which i cant afford an so am i anyone got an idea or 3?????????