P0170 Fuel System Odyssey, Destination Resolution

The P0170 is defined as “fuel trim malfunction, bank1.” This is a DTC (diagnostic trouble code) that is triggered when the fuel trim in cylinder ... Explore the P0170 OBD-II code for fuel trim issues: learn common triggers like vacuum leaks and MAF sensor faults, along with diagnostic tips at RepairPal. Steps taken: Thoroughly cleaned out throttle body. Pulled and cleaned the MAF sensor. Both with the appropriate cleaners. Cannot find any leaks, ... I will take you though the repair of both P0170 and P0172 - How to diagnostic the car problems and EASYLY fix it. The car has both a problem ... The most common problem associated with this code is the MAF sensor or air mass meter. This is especially the case with Mercedes-Benz and Volkswagen and other ... The p0170 code refers purely to the fuel mixture (air/fuel ratio) but without stating which way it's going. p0171 is mixture to lean and P0172 is too rich. 16555/P0171/000369 - Fuel Trim; Bank 1: System Too Lean. Possible Causes: Mass Air Flow Sensor (G70) defective, Intake System Leak(s). The Toyota FSM says the P0170 code for the 1995 LC is not set until fuel trims have reached +/- %35 and my trims are not even close to that. First thing to check for is vacuum leaks posted MAF. P0170 indicates a lean condition with unmeasured air. Second would be fuel. 'P0170' Fuel Trim Malfunction Bank 1 Legacy Forum.