Original post by: L Pfaff ,


@mike_mac , Mike, Suzuki error code P1172 - Lambda controller limit malfunction bank 1 too lean. Info found at link #1 below.

Possible faults are, low fuel level, low fuel pressure, restricted fuel system(plugged filter/pinched/damaged line , MAF(mass air flow)/MAP(manifold absolute pressure) sensor faulty/malfunction, also check for vacuum leaks as link #2 Suzuki trouble shooting forum recommends.

Make sure fuel level is good(not empty), check for clogged gas filter(replace if it has not been done recently) and pinched/damaged fuel line, have fuel pressure checked(replace fuel pump if found to be too low) and or clean/replace MAF sensor. Good luck.

I hope this helped you out, if so let me know by pressing the helpful button.