My auto load leveling sensor has gone bad on my 2003 Tahoe Lt. The air pump has been recently replaced, so is there a way to by-pass the circuit boards and even the air pump and just take the air intake lines to the rear shocks and make them like a manual air shock, where you control the pressure in the shocks?

Your climate system can only cool or heat but not both. The temperature has a big effect on this. The cooling needs the compressor.

ok lets start with the codes they say your getting. P??? which 1's and how many. there are few o2 sensors, are they next to the Exhaust next to the converter? MASS AIR FLOW -MAF use this, for now i am guessing, until i see the correct codes your are getting. this could be the 1 you may have below, please read it........

• P0103
  Mass Air Flow Sensor Circuit High Input
• Possible causes
• Faulty mass air flow sensor
  - Intake air leaks
  - Dirty mass air flow sensor
  - Dirty mass air filter
  - Mass air flow sensor harness is open or shorted
  - Mass air flow sensor circuit poor electrical connection
• Before replacing the mass air flow sensor, try replacing the air filter and cleaning the air flow sensor with low compress air or mass air flow sensor cleaner. Reset code and drive vehicle. If the code comes back, it may be necessary to replaced the mass air flow sensor.
• possible symptoms Engine Light ON (or Service Engine Soon Warning Light)
  - Engine stall
  - Engine running rough
  - Excessive fuel consumption
  - Excessive smoke
• the code is generated when An excessively high voltage from the sensor is sent to Engine Control Module (ECM).

2003 NISSAN Altima Sedan OBDII Codes List

Could be the crank sensor, fuel pump, or simply a relay going bad. Is the check engine light on? If so get the codes out of it and that will be your first step. I think pepboys, advanced auto and autozone will retrieve your codes for free. Give one a call and ask them.

If you have looked up the code and it tells you the vehicle is running lean and you have changed the O2 sensors, you may have a clogged fuel filter or worst yet a fuel pump that is going bad and not providing enough pressure. Take it to a repair shop and ask them to test the pressure. It is an inexpensive test that will only take a couple of minutes. If the pressure is low try replacing the filter first as it is much cheaper than replacing the fuel pump that is in the gas tank.

P1784 low reverse pressure switch sense circuit.
Start by checking fluid level and condition. then check electrical connections. if all ok, probably solenoid in the valve body assembly.

P1767 Transmission Relay Always On. Transmission Range Sensor Circuit Malfunction (PRNDL Input)

Start with the simple and Check your fuses and transmission fluid level, if the level is good and the condition of the fluid is good. There may be an issue with your solenoid or your transmission pump. You can check your pump buy checking your transmission fluid level with the engine not running and take note where the level is. Then start the engine and check the fluid level again, if the level has gone down. The your pump is good, if it does not go down. Then your pump has gone bad and your going to have to rebuilt the transmission or replace the pump.

You better of replacing the whole transmission of the pump has gone bad, since the low transmission fluid pressure would have worn out most for your clutches throughout the transmission.

Thank you for using Fixya and hope is just a simple Solenoid that has gone bad or a wire harness that has shorted out.

the lt autoride has self adjusting shocks, and the regular lt doesn't. if you look the autoride has airlines going to the shocks.

Ok, there are sensors on your front wheel hubs. This could easily cause the abs light to turn on. The loud noise could easily be your wheel hub going bad. Easiest way to check, jack up the front of the truck, grab tire, shake back and forth and up and down. Same amout of play each way? You're wheel hub is bad.......

For p0300 ,p0240 on chevy tahoe 00- 06 check a wire going along with the battery ground to the engine block thre should be a high resistence on the small wire ,it gets corrode over time ,it should be located on underneath of the driver side engine,

That is an indication that your air shocks at the rear needs to be replaced or there is a sensor that may have gone bad, event the air pump mey not be working. Most owners replace the more expensive air shocks with good conventional shocks like Monroe Reflex Shocks if there not towing heavy trailers. You can have the conventional shocks installed and have the ride control system deactivated. First check your fuse just t make sure the fuse to the air compressor has not gone bad, and the air ride leveling sensor, wire harness has not been damaged due to corrosion. 

Its probably the temperature actuator located in the right rear interior