Top 20 2005 Acura MDX Questions & Answers

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There are three places that water can be coming from. The least likely is from underneath, unless you've been driving through deep water (ask the kids about that if they get to use the car). ;-) The other places are from a plugged sunroof drain - just open the sunroof, and carefully pour a quart of water into the channel in the front and see if it finds its way through the drain holes at the front corners, and out the bottom of the car (it takes just seconds to make the trip). The third possibility is a gap in the gasket or sealant around the windshield (the water will run down inside the windshield pillar, and find its way to your carpet). The only option there is to have the windshield replaced (or at least removed and reinstalled - if you can find someone who'll do that). There's some chance that there's a rust hole under the gasket, too, particularly if the windshield was replaced previously by a ham-fisted tech who scratched up the paint when replacing a windshield.

the speedometer is more then likely due to a fauly speed sensor on the transmission, presuming your check engine light is on, try resetting ecu by removing battery cables for 5 mins, then plugging them back on battery, ensure you have radio code before doing so to avoid locking the radio if it is still the stock radio, if problem is not resolved check engine codes for possible fault shift solenoids, also ensure there is enough transmission fluid, to check turn the car on let run for 10-15 mins to warm up oil, block the wheels and place transmission in neutral and verify correct level of oil, if no codes present and oil at right level, suspect a faulty torque converter in the transmission.

Sounds like (no pun) it is the alarm system going off. After installing the battery try using the key fob to deactivate the system.

You have to reset theft system . Did you try putting key in the ignition and turning it on and off .

MUST have broken sensor

Tires and locks are unrelated. First I have the codes read for the BCM, then I would go for the drivers door. At the door jam in front, there is a boot that holds the wires. Check for broken wires here first. The go to the hatch and check for broken wires in the boot at the top. Codes will tell you which latch is bad. Go for them also.

Check for power and ground at the headlight plug. Test lights are cheap.

Easy on most Acuras. Less than an hour.

When it returns. P0420 is a bad catalytic convertor. Nothing else will set this code. It will need to be replaced.

This is a transmission range switch code.

Need to know Exactly where the wire is located. Pictures would be of help and if possible where the wire is going to on each end (would be helpful) also, is the car AWD or FWD? engine size? turbo?

Something is out of parameters.

Check under the hood for the computer or relay center, it could be under the dashboard on the driver side against the wall.

You are missing a digit. P0300? P0740?

You should have a P with a four place number.

Code sets when sensor return voltage stays high for abnormal period of time. It could be the heater in the O2 sensor or if the car has high mileage, the catalytic converter. Check sensor return voltage running vehicle at about 2,000 RPM for 3-5 minutes. If voltage is comparable to front sensors on same side there is a catalytic convertor inefficiency because the sensors is well warmed by then. If it is much lower than the front one, the heater in the sensor is bad.

1996-newer (OBD-II) vehicles use oxygen sensors and a catalytic converter to reduce emissions. There is one O2 (oxygen) sensor in front of the catalytic converter (called upstream), and one behind it (downstream). When the engine is warmed up and running normally the upstream oxygen sensor reading fluctuates and the downstream one is fairly steady. In the case where both readings are fairly steady, a P0420 check engine light code is set. Possible Causes: Oxygen (O2) sensor not working correctly Damaged or leaking exhuast (pipe, manifold, catalytic converter) Damaged catalytic converter Diagnostic Help: To diagnose a P0420 trouble code we begin by checking for exhaust leaks under the vehicle. Then use an oscilliscope to check the waveforms of both upstream and downstream O2 sensors. The front reading should vary, the rear should be steady. Replace as necessary. Check the rear Heated O2 Sensor. Check the catalytic converter, replace if necessary. If necessary, check for wiring and component concerns. See our article "Automotive Circuit Testing 101", if you need more assistance with this. Remember to refer to an model-specific repair manual for proper instruction.

the operators guide told you to keep the green code card in a safe place,. i bet its lost, right? not in the glove box> or better in the nightstand?at home? you only have 2 choices, posted 30 times now....btw the dealer or any certified, locksmith, (call and ask first) you will have to prove you own car...... for obvous reasons.

are you asking where it is.? why it blow (shorted line)? or what? ?