You either have a bad oxygen sensor or a vacuum leak. Code P1133 indicates a faulty heated oxygen sensor but a vacuum leak could also cause this code.
20 gallons of gas says the manual
Follow the manufactures recommendation as listed in your owners manual or change it every 5,000 miles.
in my 2003 bonneville i got same code number and was told its a torque convertor clutch solenoid circut stuck on
remove radio from a grand marquis 2003
Brisbane won the 2003 grand final by 50 points
Immortal Grand Prix - 2003 was released on: USA: 15 September 2003
replacing a fuel sensor on a 2003 grand prix?
how do you remove the back seat in the 2003 poniac grand am
Where are the freeze plugs on a 2003 pontiac grand am
The 2003 Dodge Grand-Caravan has 12 valves.
The 2003 Jeep Grand-Cherokee has 12 valves.
The 2003 Suzuki Grand-Vitara has 24 valves.