P0172 Diagnostic Trouble Code Discussion for December 2018
Fuel System Rich (Bank 1)
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| Help Request | Posted | |
| 2006 Ford F-150 XLT 5.4L Poor Fuel Economy, MIL Lamp on VIN: 1FTRX14516 P0172: Engine Too Rich Bank 1. Truck came in about 2 months ago with Knock sensor codes. We recommended new sensors, customer declined. Truck came back Friday with same codes. We did the repair and delivered the truck. Monday the customer calls and says the engine light is on and th... |
December 18, 2018 | |
| 2005 Ford F-150 FX4 5.4L Cuts out VIN: 1FTPX14555 The remaining problem is that fuel trim numbers are negative 25 at idle and up to positive 25 on accel and sets rich and lean codes. Seems to run good other than stumble right off idle sometimes.no misfires. All temp sensors seem to make good sense. Any id... |
December 27, 2018 |
