Cel P1135, P1155, please help
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hi guys,
my car is 99 es300, 74k miles, changed timing belt and 2 cam seals and crank seal. now i'm getting check lights, so OBD 2 to checked the code, p1135 and p1155. i changed both sensors front and back (Denso, original parts), cleaned MAF, replaced air filter (K&N). unplug battery and plug back on, and still getting cel light. I checked see if bad fuse and relay, they are fine. what else can i do to get rid of dam lights. please help,,,,,![Egads!](https://www.clublexus.com/forums/images/smilies/pat.gif)
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my car is 99 es300, 74k miles, changed timing belt and 2 cam seals and crank seal. now i'm getting check lights, so OBD 2 to checked the code, p1135 and p1155. i changed both sensors front and back (Denso, original parts), cleaned MAF, replaced air filter (K&N). unplug battery and plug back on, and still getting cel light. I checked see if bad fuse and relay, they are fine. what else can i do to get rid of dam lights. please help,,,,,
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If you clear the codes and reset the ECU, do they come back insantly when you drive the next time? If so, this would indicate a "hard" fault and something is wrong w/ the sensor you replaced. If you drive the car and it takes a while for the CEL to come on and you check the codes, does it show a "pending" code? If it's a pending code, then the sensor is fine but something else is causing the issue.
Did you replace the sensors because you were getting codes before? Did someone say you needed to change them? I didn't have to change my Air/Fuel sensors until 230k miles.......
When it comes to the Air/Fuel sensor or 02 sensor, I use Toyota OEM parts, nothing from Autozone, etc.......
Did you replace the sensors because you were getting codes before? Did someone say you needed to change them? I didn't have to change my Air/Fuel sensors until 230k miles.......
When it comes to the Air/Fuel sensor or 02 sensor, I use Toyota OEM parts, nothing from Autozone, etc.......
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If you clear the codes and reset the ECU, do they come back insantly when you drive the next time? If so, this would indicate a "hard" fault and something is wrong w/ the sensor you replaced. If you drive the car and it takes a while for the CEL to come on and you check the codes, does it show a "pending" code? If it's a pending code, then the sensor is fine but something else is causing the issue.
Did you replace the sensors because you were getting codes before? Did someone say you needed to change them? I didn't have to change my Air/Fuel sensors until 230k miles.......
When it comes to the Air/Fuel sensor or 02 sensor, I use Toyota OEM parts, nothing from Autozone, etc.......
Did you replace the sensors because you were getting codes before? Did someone say you needed to change them? I didn't have to change my Air/Fuel sensors until 230k miles.......
When it comes to the Air/Fuel sensor or 02 sensor, I use Toyota OEM parts, nothing from Autozone, etc.......
#6
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From your description, the codes that are being triggered are NOT "hard" faults......it takes one ignition cycle for a "hard" fault - light would come on instantly. A pending code is the ECU "sees" a potential problem but "waits" to see if the condition remains again on the next ignition cycle. If it does, then it triggers the CEL.
You said you changed your timing belt - are you 100% positive you aligned ALL the marks correctly when installing the new t-belt? My hunch is that it is off a coupe of teeth and the ECU can't compensate all the way changing the air/fuel mixture - thus throwing both codes for both sensors at the same time........
Go check this and let us know your findings.........
You said you changed your timing belt - are you 100% positive you aligned ALL the marks correctly when installing the new t-belt? My hunch is that it is off a coupe of teeth and the ECU can't compensate all the way changing the air/fuel mixture - thus throwing both codes for both sensors at the same time........
Go check this and let us know your findings.........
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thank you
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From your description, the codes that are being triggered are NOT "hard" faults......it takes one ignition cycle for a "hard" fault - light would come on instantly. A pending code is the ECU "sees" a potential problem but "waits" to see if the condition remains again on the next ignition cycle. If it does, then it triggers the CEL.
You said you changed your timing belt - are you 100% positive you aligned ALL the marks correctly when installing the new t-belt? My hunch is that it is off a coupe of teeth and the ECU can't compensate all the way changing the air/fuel mixture - thus throwing both codes for both sensors at the same time........
Go check this and let us know your findings.........
You said you changed your timing belt - are you 100% positive you aligned ALL the marks correctly when installing the new t-belt? My hunch is that it is off a coupe of teeth and the ECU can't compensate all the way changing the air/fuel mixture - thus throwing both codes for both sensors at the same time........
Go check this and let us know your findings.........
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when i checked fuse it was fine but relay, i'm not sure, i just guess it's ok, because when i read this forum someone said if you have 4 different codes then it's bad relay, but mines are 2 codes and repeating (p1135, p1155, p1135, p1155)... if it's relay, do you know which one it is? i want to check it.
thank you
thank you
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The A/F relay is under the hood I believe. It's labeled as "A/F RELAY". To test the relay, disconnect the relay. Flip the relay over. Look for pin 30 & 87. Get a DVOM, set it to continuity check, touch the pins, it should have continuity. Pins 85 & 86, get a jumper cables apply battery power and ground to it and hear it click, if doesn't relay no good. Make sure the A/F fuse is good also.
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