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P0404 2000 cadillac dts

The p0404 code is showing up on my 2000 cadillac dts what could this be?

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Torsion Bar on Cadillac dts 2006 fell off but isn't broke, how do I put it back on. Amy suggestions or links showing how to install?


Whatever fell off isn't a torsion bar - there isn't one. For help, describe the part better (a picture would help).

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Well, I don't think so. The pressure sensor will throw its own code (0450, 0451, 0452, 0453, or 0454). And likewise, the fuel level sender or sensor could also throw its own codes (P0460-P0464).

I'm not sure the level sensor and the pressure sensor are linked together. They are separate on a 2005 buick century, the pressure sensor being at the top of the tank located on the fuel pump module, but Cadillac: anything is possible.

Since you replaced the purge solenoid, there may be a problem in the circuit. The purge should have battery voltage to it with the key on. The ECM will ground the circuit internally when the purge is wanted. One symptom of a purge valve that isn't working or stuck closed can be a whooshing sound when the fuel tank cap is opened, indicating excessive pressure in the tank.
A shop's scan tool could be used to command the purge valve on to check it.

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1 Answer

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1 Answer

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1 Answer

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