code P0171 (system too lean-bank 1)?
04-12-11, 06:03 PM
#16
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Trouble code P1133 indicates that the Bank 1 Sensor 1 Air/Fuel ratio sensor does not function correctly. This code will set if the heater in the sensor does not operate. The sensor is a very common failure.
Last edited by obtainchi; 04-12-11 at 06:20 PM. Reason: Mis-Diagnose
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irishman88 (08-22-19)
04-12-11, 08:21 PM
#17
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Hmmmmmm, ok, well, appears you had the proper one replaced. Here in Calif. we have to use a specific air/fuel O2 sensor, because of the strict Calif. emissions. There are two parts numbers for the O2 sensors, one is for Calif emission vehicles and the other is for non-Calif emissions. Hopefully, you have the right one for that ES300. Otherwise, dont know why your having a CEL for the O2 sensor if you got the proper one replaced. Keep us posted and maybe you might have to take it into a Lexus dealer or find a Lexus mechanic who can diagnosis the issue right away. Good Luck.
04-15-11, 05:56 AM
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So just making sure..U replaced bank 1 sensor 1( behind the engine against the firewall) ? How many wires were on the sensor? It should be four if it's a heated o2 sensor.I also had the p0171 and replacing all the o2 sensor removed the system too lean code.
Last edited by brandoe91; 05-30-11 at 08:03 PM.
10-22-13, 07:40 AM
#19
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any time you have an entire bank msifiring as in timing go to the OCV... and OCV filters... more than likely the too lean is from the misfires... or in our es300's Lexus calls them Cam Timing Valves part number 15340-0A010 and 15330-0A010...
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Scraape (03-25-17)
10-23-13, 03:19 PM
#20
Variable valve timing was introduced in 1998 for the 1999 model year. I think the op's car has no VVT therefore no OCV.
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tattooeasy (07-09-17)
10-23-13, 03:26 PM
#21
P1133 indicates slow response sensor. P1135 indicates a defective heater element.
10-23-13, 03:29 PM
#22
thanks man, i just hope it won't be too late and too expensive until i find the exact cause of P1133 (with a new sensor in place). i am not sure, but with the right car specifications, Denso provides proper air/fuel ratio (o2 sensors) sensors. Another mechanic wants to replace the 1,3 and 5 fuel injectors.
02-23-14, 11:50 PM
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checked my engine light at Autozone and the codes on my es300 1998 were:
1. P0300, P0301, P0303, P0305 (random cylinder misfire, cylinder misfire 1, 3, and 5).
2. P0171 - "system too lean- bank 1 (cylinder number 1 denotes bank 1)"
I had some recent repairs, which are: tuneup (spark plugs, ignition coil #2, ignition coil wires), oxygen sensor (bank 1 sensor 1).
i have visited several mechanics, none of them have pointed to a particular problem, basically they are trying to change most of the engine. Please share any tips that you have thx.
1. P0300, P0301, P0303, P0305 (random cylinder misfire, cylinder misfire 1, 3, and 5).
2. P0171 - "system too lean- bank 1 (cylinder number 1 denotes bank 1)"
I had some recent repairs, which are: tuneup (spark plugs, ignition coil #2, ignition coil wires), oxygen sensor (bank 1 sensor 1).
i have visited several mechanics, none of them have pointed to a particular problem, basically they are trying to change most of the engine. Please share any tips that you have thx.
11-20-14, 02:16 PM
#24
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Also am bumping this as I too have same problem misfire 1 3 5 and lean bank...hoping someone has better answers. 294k miles. Lot of maintenance done too it... runs rough.
Thanks,
Lee
Thanks,
Lee
11-22-14, 07:24 PM
#25
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Found the problem. The air inlet tube made of rubber cracked a couple inches before the throttle body. Everyone should check for this when getting this code. I feel it will be common problem in higher mileage es300's.
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Jordan95 (01-24-18)
07-05-17, 03:40 AM
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checked my engine light at Autozone and the codes on my es300 1998 were:
1. P0300, P0301, P0303, P0305 (random cylinder misfire, cylinder misfire 1, 3, and 5).
2. P0171 - "system too lean- bank 1 (cylinder number 1 denotes bank 1)"
I had some recent repairs, which are: tuneup (spark plugs, ignition coil #2, ignition coil wires), oxygen sensor (bank 1 sensor 1).
i have visited several mechanics, none of them have pointed to a particular problem, basically they are trying to change most of the engine. Please share any tips that you have thx.
1. P0300, P0301, P0303, P0305 (random cylinder misfire, cylinder misfire 1, 3, and 5).
2. P0171 - "system too lean- bank 1 (cylinder number 1 denotes bank 1)"
I had some recent repairs, which are: tuneup (spark plugs, ignition coil #2, ignition coil wires), oxygen sensor (bank 1 sensor 1).
i have visited several mechanics, none of them have pointed to a particular problem, basically they are trying to change most of the engine. Please share any tips that you have thx.
how did you solve this problem? i have same problem on RX-300, please share me your experience. I'm trying to solve it few month already but....
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