A P0170 code for a 1998 Toyota 4Runner indicates a fuel trim malfunction on bank 1, meaning the engine control module (ECM) has detected an issue with the fuel mixture on that side of the engine. This could be due to various factors, such as a vacuum leak, faulty fuel injectors, a malfunctioning mass airflow sensor (MAF), or issues with the oxygen sensors. If left unresolved, this can lead to poor engine performance, increased emissions, and decreased fuel efficiency. It's advisable to diagnose the underlying issue promptly to prevent further damage.
Trouble code P0170 means:Fuel trim malfunction (Bank 1)
Trouble code P0170 means:Furl Trim Malfunction (Bank 1)
Trouble code P0170 means:Furl Trim Malfunction (Bank 1)
Trouble code P0170 means:Fuel trim malfunction (Bank 1)
Trouble code P0170 means:Fuel trim malfunction (Bank 1)
Fuel trim malfunction, bank 1.
For 1996 and newer Trouble code P0170 means:Fuel trim malfunction (bank 1)
Trouble code P0170 means:Fuel trim malfunction (bank 1)
Trouble code P0170 means: Adaptive Fuel Trim Too Rich or Too Lean (Bank 1)
P0170 Fuel Trim Malfunction (Bank 1)
P0170 is for engine code for a bank 1 fuel trim (mix) malfunction. In this situation the vehicle may be running lean. The emissions components such as the mass air flow sensor (MAF) and others will need to diagnosed and checked.
P0170 Fuel Trim Malfunction (Bank 1) Plenty of sites you guide you through obd-codes. Check e.g. obd-codes.com