Check engine light came on. Code reader said: P0453 High reading from EVAP. 2 months of research and here are the results!
Turned out to be a severed wire harness on top of the fuel tank going to the FTP (fuel tank pressure) sensor. Have to drop the fuel tank to repair.
First confirm the error by checking the 3 wires coming from the sensor at the connector (C211) in the right pillar at the passenger seat. Pins 18-19-20.
Pin 18 is 5 volts reference using pin 20 as the signal return (ground). Pin 19 is the signal sent from the FTP. Should be around 2 to 3 volts. My problem was 5 volts on pin 19 caused by an open return (ground).
When I tried to purchase a new FTP on both Ebay and Amazon, I noticed that only a wire connector was available. This was a big hint. Apparently only the wires are the problem! There is a 6 inch length of cable extending to the FTP that seems to vibrate over 10 years to the extent of separating!
Now to drop the tank to solder the wires back together, you just need to lower the back of the tank 6 inches by removing the heat shields and disconnecting the filler hose. After lowering 3 inches, disconnect the cable to the canister and continue to 6 inches so you can reach the separated wires. I could not disconnect the FTP connector because the brilliant engineers placed the connector upside down making the lock on the connector inaccessible! Luckily, I could solder the wires on top without disconnecting.
One more hint. Do not disconnect the muffler and tailpipe as directed by the field service manual! Just bend the interfering shield down.
