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Car Forum / Lexus Cars / April 20091999 RX 300 check light
My RX300 check light came on yesterday, I cheked the under the hood and everything looks normal, I checked the gas tank cap and made sure it is tight, car runs fine but I am concern. please help. Abid > My RX300 check light came on yesterday, I cheked the under the hood > and everything looks normal, I checked the gas tank cap and made sure > it is tight, car runs fine but I am concern. > please help. > > Abid Abid, There are literally hundreds of possible causes for the check engine light. The gas tank cap should be tightened until you hear it clicking. If a loose gas cap is the cause, the check engine light will turn itself off after a few trips. Bring your vehicle to a place like Autozone that will lend you a scanner to plug in to the test port under the driver's side of the dashboard. Note the numerical trouble code, post the code(s) here, and I can provide some things to check.  SignatureRay O (correct punctuation to reply) On Jan 25, 4:01 pm, "Ray O" <rokig...@NOSPAMtristarassociates.com> wrote: > <ak...@att.net> wrote in message > [quoted text clipped - 22 lines] > Ray O > (correct punctuation to reply) Thanks Ray, the code is P1133 Seems you've got plenty of company! http://www.google.com/search?hl=en&q=%2B%22P1133%22+%2B%22lexus%22&aq=f&oq= On Jan 25, 4:01 pm, "Ray O" <rokig...@NOSPAMtristarassociates.com> wrote: > <ak...@att.net> wrote in message > [quoted text clipped - 27 lines] > Ray O > (correct punctuation to reply) Thanks Ray, the code is P1133 On Jan 25, 4:01 pm, "Ray O" <rokig...@NOSPAMtristarassociates.com> wrote: > <ak...@att.net> wrote in message > [quoted text clipped - 27 lines] > Ray O > (correct punctuation to reply) Thanks Ray, the code is P1133 ******* P1133 is a Toyota-specific code - Air/Fuel sensor circuit response malfunction An air/fuel sensor is kind of like an oxygen sensor, and I believe that it is only installed on vehicles with California emissions requirements. Unfortunately, I do not have access to a factory repair manual for your car, so I can only guess that since the trouble code does not identify which of the 2 A/F sensors is bad, that there is an open or short in the circuit for the sensors. Inspect the wiring for the sensors, which should be mounted near or above the O2 sensors on the exhaust manifolds and look for damage to the insulation and wires. If you are in the U.s. and are willing to pay $10/day, you can go to techinfo.toyota.com for access to the factory repair manuals and wiring diagrams as well as specific instructions for diagnosing the trouble code. Diagnosis will require a code scanner with the ability to display voltages from particular sensors, or a volt/ohm meter. SignatureRay O (correct punctuation to reply) > Thanks Ray, the code is P1133 1999? You're ripe for a sensor replacement. Bear of a job to get at it. Parts stores like Autozone and others have OBD-II readers and other tools on their Free Loaner Tool program. This including oxygen sensor sockets. So you can always check your local store's policy. Denso sensors don't seem to be the most reliable sensors, but they are cheap. However, on some cars they may be the only choice. P1133 indicates Bank 1 Sensor 1, which is the right bank. If it's seized from road salt/corrosion, you may have difficulty in removing it. Otherwise the $137+shipping (www.rockauto.com) #2349009 Denso (Toyota #89467-41011) should be fairly easy to replace if you or friends are mechanically inclined. Read also the P1133 experience of others on: http://clublexus.com/forums/rx300-forum/103353-code-p1133-a-f-sensor-and-shift-p roblem.html On Jan 25, 10:45 am, ak...@att.net wrote: > My RX300 check light came on yesterday, I cheked the under the hood > and everything looks normal, I checked the gas tank cap and made sure > it is tight, car runs fine but I am concern. > please help. > > Abid |
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