Po131 Po171 P1133 codes on 2007 chevy equinox

Question

Already replaced maf sensor o2 sensor b1 s1 & still bringing up codes po171 po 131 p1133

Answer 1

Hi there,

P0171 indicates the fuel mix is too lean. Here is a list of possible causes.

P0171 CHEVROLET - Fuel Trim System Lean Bank 1

Read more: https://www.autocodes.com/p0171_chevrolet.html

P0131 and P1133 indicates an issue with the O2 sensor. Here is a list of possible causes.

P0131 CHEVROLET - HO2S Circuit Low Voltage Bank 1 Sensor 1

Read more: https://www.autocodes.com/p0131_chevrolet.html

P1133 CHEVROLET - HO2S Insufficient Switching Bank 1 Sensor 1

Read more: https://www.autocodes.com/p1133_chevrolet.html