Top 20 2009 Cadillac DTS Questions & Answers

Question edited for clarity and dreadful spelling of 'Cadillac'. Question moved to model category. Yes it does have power steering. https://www.google.com/search?q=2009+Cadillac+DTS+power+steering ..

I would have the cooling fans checked. When the car is moving there is air forced through the radiator naturally. But when stopped, the car relies on the fans to pull air through the radiator to pull heat out of the coolant.

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Third gear clutch pack worn out ! Your best bet is have check out at the transmission shop ! May have DTC'S - diagnostic trouble codes , shift solenoid .

this could be a door switch problem or a BCM problem. access the BCM for codes and data this will help. check to make sure the headlight switch for the interior lights is in the off position.

Is there a security light lit on the instrument cluster ? could be a anti-theft system problem ! Three electronic control modules involved in the starting circuit of this vehicle , BCM - body control module , PCM -powertrain control module , an theft deterrent module ! The immobilizer system functions are provided by the theft deterrent module (TDM) and the engine control module (ECM). When an ignition key is inserted into the ignition lock cylinder and the ignition is switched ON, the transponder embedded in the head of the key is energized by the exciter coil surrounding the ignition lock cylinder. This exciter coil is part of the TDM. The energized transponder transmits a signal that contains its unique value, which is received by the TDM. The TDM then compares this value to a value stored in memory. If the values match, the TDM will send the prerelease password via the serial data circuit to the ECM. If the transponders unique value is incorrect, the TDM will send the fuel disable password to the ECM. When the ignition switch is placed in the Start position a discrete signal is supplied to the body control module (BCM) notifying it that the ignition is in the Start position. The BCM then sends a message to the engine control module (ECM) notifying it that CRANK has been requested. The ECM verifies that the transmission is in Park or Neutral. If it is, the ECM then supplies 12 volts to the control circuit of the starter relay. When this occurs battery positive voltage is supplied through the switch side of the starter relay to the starter solenoid. If you knew how , in the under hood fuse / relay box is the starter relay , it has a four pin socket when relay is removed ! Two should have battery voltage , one should show ground an one is control voltage from the PCM on pin 86 , pin 85 goes to ground. Pin . Pin 87 should have battery voltage an pin 30 supply's voltage to Fuse #24 marked STRTR in the under hood fuse / relay box ! Yea , if you look on the bottom or side of the relay the pins are marked ! Check for what is missing power or control an go from there .

Do you mean (FTP) FUEL TANK PRESSURE SENSOR IF YES THEN ITS MOUNTED ON FUEL SENDING UNIT.
THEN YOU HAVE PRESSURE SENSOR ON FUEL RAIL THAT MEASURES FUEL PRESSURE.

check whether you do have any wire touching someting shortening.

In your owners manual & may be inside the cap door

switch is bad

Yes have all tires removed from rims and have them sealed,,,a tire shop will know what you mean.

You can't override it. The anti theft system and immobilizer are there to stop exactly what you are trying to do, start the car with a key that is not programmed to the car. You have to fix the problem, not find a way around it. You need to reset it to recognise the key. If you didn't buy a new chipped key, you have a valet key and it won't start the vehicle ever.. https://www.google.com/search?q=1999+Cadillac+DTS+reset+security ..

it has to go into the radiator low somewhere, look for the start of it there...the other end may be > the water pump outlet. Usually...unless there is something freaky about the particular one, these rad hoses are clamped either end with either a stiff spring clip clamp, which needs pliers ...or a gear clamp, which needs screwdriver.Have something in place to drain radiator contents into.

Try to check for codes using a code reader. It could be the temperature sensor is going out.

Have you got the valet switch turned on?

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That is usually a problem with the overdrive lockup solenoid inside the transmission.

It sounds like you have a failed transmission.

Not sure what you're saying but if you mean the sunroof slides closed but the rear doesn't come down and seat fully, the I'd start by looking to make sure nothing is in the way of it fully closing, also when was the last time you greased the slides on the sun roof?

The actuators or air diverters are fubar. Motor is fine.