Question

I have a 2004 Pontiac Vibe with the engine codes P0133 and P0171. I received both codes, how can I fix them?

Answer 1

P0133 02 sensor slow response Bank 1 Sensor 1

P0171 Fuel trim lean Bank 1

Fix the lean fuel trim when the fuel trim occurs , what happens is the 02 sensor reacts slow, vacuum leak would be the common cause for a lean fuel trim

Answer 2

P0133 PONTIAC Code - HO2S Slow Response Bank 1 Sensor 1
Read more: https://www.autocodes.com/p0133_pontiac.html

P0171 PONTIAC Code - Fuel Trim System Lean Bank 1
Read more: https://www.autocodes.com/p0171_pontiac.html