DTC P0170, DTC P0171 &/Or DTC P0172: Notes
Code Definition
- DTC P0170: Fuel Trim Malfunction
- DTC P0171: Fuel System Too Lean
- DTC P0172: Fuel System Too Rich
NOTE:
Before performing any DIAGNOSTIC TEST, refer toWARNINGS, CAUTIONS and NOTES in DIAGNOSTIC TESTS
.
NOTE:
Testing individual components does not isolate shorts or opens. Perform all voltage tests using a Digital Volt-Ohmmeter Meter (DVOM) with a minimum 10-megohm input impedance, unless stated otherwise in test procedure. Use ohmmeter to isolate wiring harness shorts or opens.