P1157 Diagnostic Trouble Code Discussion for August 2015
Air Fuel Sensor (Bank 1 Sensor 1) AFS Line High Voltage
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| Help Request | Posted | |
| 2003 Ford Expedition Eddie Bauer 4.6L Excessive Emissions, Poor Idle Quality, Poor Fuel Economy VIN: 1FMRU17W63 P1157: Map Supply Voltage Failure. Vehicle will intermittently run Bad (Chugs, sputters w/ loss of power), No DTC's. When this occurs Bank 1 STFT goes to -26% and Bank 2 STFT goes to +20% . All other data looks fine. The symptoms only last for 15 to 20 seconds then it will clear up and run fine... |
August 09, 2015 |
