Having problems with your Ford Escort ?

Hello and thank you four time.I have a 2003 zx2 with a trouble code of po171 .is there a know malfunction that the ZX2 of 2003 has that will set off this code. Thank you . Tom.H

Posted / edited by AnonymousUser on : 21-06-2021

Answers :

Google po171 ford , and a reply from aa1car.com will explain the code and what causes it , and possible remedy's.

System too lean bank 1
- The adaptive fuel strategy continuously monitors the fuel delivery hardware. The test fails when the adapative fuel tables reach a rich calibrated limit

Probable Cause[s]

  1. Fuel plugged or dirty /Damaged or worn fuel pump /fuel supply line restricted
  2. \015\012
  3. Exhaust leaks in the exhaust manifold or gasket or mating gasket before or near the heated oxygen sensor (HO2S)
  4. \015\012
  5. Air leaks after the mass air flow sensor ,vacuum leaks
  6. \015\012
  7. Damaged or contaminated maf sensor
Repair Help & Product Troubleshooting for Ford Escort

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