DTC P0170 & P0173 - Fuel Trim Failure
NOTE:
For component terminal identification, see TERMINAL IDENTIFICATION
in this article. For wiring diagrams, see WIRING DIAGRAMS
article.
- No specific self-diagnostic test is provided by manufacturer. Check volume airflow sensor, fuel injectors, engine coolant temperature sensor, intake air temperature sensor, barometric or manifold absolute pressure sensor, heated oxygen sensor, and related connectors and harnesses.
- Also check fuel pressure, check for intake air leaks, and for cracked manifold. Refer to the BASIC TESTING and SYSTEM/COMPONENT TESTS articles.