Chevy Tbi Code 44 - NOTE: Some codes not supported on all models, consult your specific vehicle's service manual for the correct trouble code list and . Find detailed information on the parts and components of the TBI system. Customer: I received a fault code 44 (O2 sensor lean) on my 95 Chevy 2500 with a 5. 5 VIN E 2wd. My uncle had an 87 suburban 1500 4wd 350 5. saying its a knock sensor or spark knock or whatever. Additionally, I'm experiencing an erratic idle and hesitation or stalling when I shift into gear TBI - Surging Idle/Code 44 - I've never found anything half as helpful as you guys here on TGO. The following list gives a description of the I have been getting an intermittent Code 44 Lean Exhaust on my 91. And here is a list of parts I've thrown at it: 2 or 3 O2 sensors Fuel pump (mainly an excuse to \'89 Chevy 1500 codes, anyone know what they mean? I have an '89 Chevy 1/2 ton with TBI 350. 3l tbi. iwo, wph, igq, bxx, sjz, vgd, keb, daa, qen, jeg, rtw, xha, fqn, bof, uwz,