P2121 code - Accelerator Pedal Position Sensor
12-15-18, 07:30 PM
#1
Driver School Candidate
Thread Starter
P2121 code - Accelerator Pedal Position Sensor
I have a 2004 ES330. It’s my daily driver and runs great but I just pulled the car out of the garage to wash it and when I turned it back on, the check engine light came on so I scanned the code and got a P2121. I checked the connection on the sensor behind the pedal and it’s perfectly fine but there’s a delay when pressing the accelerator pedal to get the RPM’s up and I have not tried driving the car. I cleared the code and still have the same symptom on the accelerator pedal. Has anyone ever gotten this code and fixed it? Looks like I have to replace the accelerator pedal assembly with sensor but before ordering, I just want to make sure that’s the fix for it. Any help is appreciated.
(The car has 128k miles and I purchased it from the original owner 4 months ago and has been perfectly fine since then)
(The car has 128k miles and I purchased it from the original owner 4 months ago and has been perfectly fine since then)
12-15-18, 08:17 PM
#2
Lexus Champion
That's almost always the fault of the sensor itself on the pedal but damaged wires can also cause it. Was your ES part of the recall/settlement? You can check here
https://www.nhtsa.gov/recalls#vin
https://www.nhtsa.gov/recalls#vin
12-15-18, 08:59 PM
#3
Driver School Candidate
Thread Starter
That's almost always the fault of the sensor itself on the pedal but damaged wires can also cause it. Was your ES part of the recall/settlement? You can check here
https://www.nhtsa.gov/recalls#vin
https://www.nhtsa.gov/recalls#vin
I checked my VIN on that link and it shows 0 recalls for my car.
12-15-18, 09:25 PM
#4
Lexus Champion
Not sure but I doubt it. Does the sensor on the pedal look like this one in the video? On the car he's working on the sensor is on the throttle body but I think it's basically what's on your pedal assembly could be wrong.
I can't seem to find the sensor seperate in parts diagrams maybe aftermarket has it. Amazon has the entire pedal assembly they say it doesn't fit your car but Lexus parts site says it does pretty sure I have the part number correct.
https://www.lexuspartsnow.com/parts/...010-33010.html
edit -Rockauto sells the sensor not cheap. In that video the problem is a cold solder joint.
I can't seem to find the sensor seperate in parts diagrams maybe aftermarket has it. Amazon has the entire pedal assembly they say it doesn't fit your car but Lexus parts site says it does pretty sure I have the part number correct.
https://www.lexuspartsnow.com/parts/...010-33010.html
edit -Rockauto sells the sensor not cheap. In that video the problem is a cold solder joint.
Last edited by LeX2K; 12-15-18 at 09:36 PM.
12-15-18, 09:37 PM
#5
Driver School Candidate
Thread Starter
Not sure but I doubt it. Does the sensor on the pedal look like this one in the video? On the car he's working on the sensor is on the throttle body but I think it's basically what's on your pedal assembly could be wrong.
https://www.youtube.com/watch?v=L7urUVFx4Dg
I can't seem to find the sensor seperate in parts diagrams maybe aftermarket has it. Amazon has the entire pedal assembly they say it doesn't fit your car but Lexus parts site says it does pretty sure I have the part number correct.
https://www.amazon.com/dp/B00G6I61IK/
https://www.lexuspartsnow.com/parts/...010-33010.html
https://www.youtube.com/watch?v=L7urUVFx4Dg
I can't seem to find the sensor seperate in parts diagrams maybe aftermarket has it. Amazon has the entire pedal assembly they say it doesn't fit your car but Lexus parts site says it does pretty sure I have the part number correct.
https://www.amazon.com/dp/B00G6I61IK/
https://www.lexuspartsnow.com/parts/...010-33010.html
12-15-18, 09:53 PM
#6
Lexus Champion
I don't think it will be that hard to replace. Sensor sure looks like the one in the video to me.
https://www.ebay.com/itm/183414331596
https://www.ebay.com/itm/183414331596
12-18-18, 03:33 PM
#7
Driver School Candidate
Thread Starter
UPDATE;
So it looks like the accelerator pedal assembly with sensor needs to be replaced all at once when getting the P2121 code. I couldn't find it locally brand new for sale (price ranges anywhere between $360-$500) so I went to the junkyard and took the accelerator pedal assembly complete with sensor from another 4th Gen ES. Went home, installed it and the code is gone and I have a working accelerator pedal again and the code is gone. Best part is I got a used pedal and sensor for $14.
So it looks like the accelerator pedal assembly with sensor needs to be replaced all at once when getting the P2121 code. I couldn't find it locally brand new for sale (price ranges anywhere between $360-$500) so I went to the junkyard and took the accelerator pedal assembly complete with sensor from another 4th Gen ES. Went home, installed it and the code is gone and I have a working accelerator pedal again and the code is gone. Best part is I got a used pedal and sensor for $14.
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