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Please help to identify the issue. It’s been for long time to figure out what wrongs to my Lexus IS200t with code P1170, system too lean. There were a few things serviced/replaced on the vehicle, but the issue has not been resolved.
1. MAF replaced
2. Fuel Pump replaced
3. Oxygen sensor replaced
4. Thorttle Body clean/replaced
5. Fuel Injectors replaced
6. Turbo Boost Valve Salenoid replaced
Vacuum leak checked, but nothing found.
- The current data shows Absolute Throttle Position, Position B very high.
- Long Term Fuel Trim was at 39.8% and Short Term Fuel Trim was about 15% at idle. I believe this one causes the issue. When I accelated, the fuel trim become normal, but when no pushing on gas pedal, the fuel trims come back too high as idle. Is this related to vacuum leak?
please check the pictures attached and help to isolate the issue. Thank you
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Slideshow: A five-car lineup spanning more than five decades of Toyota performance and engineering will tackle one of Italy's most celebrated automotive routes.
2017 Lexus IS200t P1170 System Too Lean
