2011 Chevrolet Malibu
Mileage
97,020
Service Date
8/27/2019
Services Performed
- CHECK PCV FLOW THROUGH BREATHER TUBE. A SLIGHT VACUUM CAN BE FELT, PCV, OK. CLEAN THROTTLE PLATE AND BORE AS NECC. CLEAN MASS AIR FLOW SENSOR. REPLACE AIR FILTER IF NECC. CHECK FOR VACUUM LEAKS. ***************
- TROUBLE CODES, P0137- B1S2 SIGNAL, P0171- SYSTEM LEAN BANK 1, P0326- KNOCK SENSOR. * CLEAR CODES AND TEST DRIVE VEH. MASS AIR FLOW SENSOR READING LOW, BOTH O2 SENSORS WILL SHOW LEAN AT IDLE. OK WHILE DRIVING. * CHECK INTAKE MANIFOLD FOR VACUUM LEAKS, NONE FOUND. INSP EXHAUST FOR LEAKS, NOTHING SEEN OR HEARD. CHECK O2 SENSORS FOR RESPONSE WITH PROPANE ADDED TO INTAKE, BOTH WENT RICH. INSP MASS AIR FLOW SENSOR. VERY DIRTY. THROTTLE PLATE AND BORE NEED CLEANING. * RECOMMEND AN EMISSION SYSTEMS SERVICE. * RETEST MAF AND BOTH O2 SENSORS WITH SCAN TOOL. ALL READINGS NORMAL. * IF CODES RETURN, VEH MAY NEED A DOWNSTREAM O2 SENSOR AND OR A MASS AIR FLOW SENSOR. *********************
EDWARD L. gave our service a 5 star review on 9/6/2019
