2002 Toyota Camry Error code P1451

  • 88,000 MILES
The check engine light came on a few weeks ago on my Toyota Camry 2002 and its been consuming more gas than it did before. I had it scanned and it gave the following error code: P1451. The place I had it scanned said that its a faulty Fuel Tank Pressure Sensor and that it should be replaced. My questions are: is that information accurate as to what needs to be replaced according to the code? And if it is, where is that sensor located at!
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Thursday, September 19th, 2013 AT 7:15 PM

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P1451 - Diagnostic Module Tank Leakage (DM-TL) Switching Solenoid Control Circuit Signal Low

This is not a code I've run into before but it is important to understand that diagnostic fault codes never say to replace parts or that they're defective. They only indicate the circuit or system that needs further diagnosis. A sensor referenced in a code can be defective but that only occurs about half of the time. There could also be a problem with the wiring going to it.

This code description suggests it's related to the system that puts the fuel tank under a small pressure or vacuum, then it is monitored to determine if there is a leak in the vapor recovery system. No one would ever know that unless it was really bad, but those are responsible for a lot of emissions due to fuel vapors escaping, including when the car is standing still. These systems check for those leaks on '96 and newer cars.

If the mechanics are experienced with your car model, they may know a part to be a common cause of this code. Without that experience, the proper procedure is to do some electrical checks first to rule out everything but the sensor.
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Thursday, September 19th, 2013 AT 11:49 PM

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