99 Es300 dies with P0171 error- Pls help!
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Hello,
i have a 99 es300 with 148k miles and recently got engine lights on with error code P0171. This also happened a year ago where i replaced the o2 sensor and the error went away only to resurface after a year.
couple months ago i observed a hissing or some similar sound while driving and when i opened the hood i could hear it somewhere close to the belt near the engine when the car was on. I wasnt sure what was causing it.but now when i turn on the car and try to listen closely i am not sure if i hear it again or if its continuously doing it..
Also when i start the car for the first stime it would die. but when i start the second time with my leg on gas raising hte accelerator the car would start fine.this happens frequently.
I have also observed a slight sound from the engine side (not sure what i should call it sounds like garr...)when i accelerate the gas after a stop sign. this goes off on a increasing speed. only happens when i put my legs on the gas after a stop or from a slow speed to increase the speed.
Anyone have any thoughts what i should be looking at ..or what could be causing these symptoms. Is there a diy steps to look at air/vacuum leaks/replace fuel filter etc? i did the o2 sensor replacement myself last time so would like to do the troubleshooting if its doable .
thanks again in advance
i have a 99 es300 with 148k miles and recently got engine lights on with error code P0171. This also happened a year ago where i replaced the o2 sensor and the error went away only to resurface after a year.
couple months ago i observed a hissing or some similar sound while driving and when i opened the hood i could hear it somewhere close to the belt near the engine when the car was on. I wasnt sure what was causing it.but now when i turn on the car and try to listen closely i am not sure if i hear it again or if its continuously doing it..
Also when i start the car for the first stime it would die. but when i start the second time with my leg on gas raising hte accelerator the car would start fine.this happens frequently.
I have also observed a slight sound from the engine side (not sure what i should call it sounds like garr...)when i accelerate the gas after a stop sign. this goes off on a increasing speed. only happens when i put my legs on the gas after a stop or from a slow speed to increase the speed.
Anyone have any thoughts what i should be looking at ..or what could be causing these symptoms. Is there a diy steps to look at air/vacuum leaks/replace fuel filter etc? i did the o2 sensor replacement myself last time so would like to do the troubleshooting if its doable .
thanks again in advance
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You're right, I was confusing it with the baffle in front of the throttle body (which is different from the RX300). Attached one can see dual throttle bodies in a 99 ES300.
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xk2nx
ES - 1st to 4th Gen (1990-2006)
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09-17-09 08:09 AM