P0453 fault code
 

Hello to all and happy holidays!!!!
Symptom: The check engine light was on and the gas gauge needle was stuck on empty.
I replaced the fuel sending unit with a new one. The check engine light remained on and the gas gauge needle remained stuck on empty after the replacement. It is obvious the fuel sending unit was not causing the check engine light to come on.
Using an ELM327 mini OBD today I got a P0453 fault code reading which references the Tank Pressure Sensor. Does anyone know how to fix it?
Thanks,
Robert

Yes, it is a short circuit in the pressure sensor circuit to the DME, probably requiring a wiring harness repair.

I had P0453 after purchasing my 02. Wiring all looked good. Replaced the sensor with another (used one, thanks Woody!!) CEL is gone.

I don't have pics on me right now, but it is very easy to access.

Open frunk
Pull battery (make sure you have your radio code!)
Pull the battery TRAY (4 x 13mm nuts)

Access to tank is there. It's a little bit tough to pull the sensor, as the harness and connection is under the lip of the body (towards back of body), but still pretty easy.

Take the one phillips head screw off, then take off the sensor from the base of the sensor.

Sometimes its jammed in there pretty tight, so moving back and forth to loosen it is helpful. Pull electrical connector. I used a couple of plastic trim removal tools to pry it apart. Once it came off, put in new (or new-used) sensor in there, press it down and screw it down to it forms a good tight seal.

Reconnect harness (make sure there's no frayed wires, etc.. as that may be the issue!), put battery tray and battery back on, and that should be it!!


I checked on the new sensor that I had resistance using a multimeter (even though I'm not very versed in that !), and the one I pulled had no resistance, showing me sensor was bad.

Hope this helps!!