2021 Honda Accord Sport(2.0) Crankposition sensor P0335

Hey Guys I’ve run until a unsolveable issue with my accord. I replaced my head gasket on my car and put everything back together but forgot to relearn the crankshaft sensor. So I had a mountain of codes come up. But the biggest one is the crankshaft position sensor (P0335 No Signal). The car starts but struggles to turn on. It dumps fuel into the chambers to turn on car. Once it finally turns on it drives in limp mode. Doesn’t go over 2500rpms. My friend was able to relearn on and off but still same issue.

Now because my sensor doesn’t communicate with the PCM. And the car doesn’t know when to time the fuel and spark it runs to rich. Causing a lot of black smoke on my O2 sensor which produces low voltage on the wiring current so all other sensors on the O2 circuit fails with low voltage.

My main focus is trying to figure out the no signal. I’ve replaced the crankshaft sensor. I’ve followed the harness from sensor to fuse box and no damaged wires.

I took the car to a Honda dealership hoping they would provide inside and maybe fix but they only ran my codes and just suggested engine tear down or engine replacement costing me $12,000. Instead of looking at the electrical issue. Of course I told them to kick rocks. So now the car is back with me. I’m not a mechanic but I do understand how cars work. I’ve done tons of research on this car before replacing my head gasket and trying to solve this issue. But I’m stuck!

Is there a fuse for this sensor? Or is it a direct circuit to PCM? Is there certain steps to relearning?

I hope covered everything required to help solve this and required for a new thread. I’ll very attentive of this post if there are any questions. I want my car back! I love my accord.

Thanks in advance!

 

If you have a scanner that can read sensor output, what does the scanner see for the voltage?

I think you'll have to try some electrical testing with a volt meter. Does the crank sensor have 3 wires going to it? What are the wire colors?

 

My friend has to bring his snap on scanner over to reread the voltage. I have pictures of most of all the codes. I’ll have to check number of wires. And my voltage.