A rattle from the rear of the vehicle may indicate that the rear shock absorbers are defective. Updated shocks are available; however, careful inspection of all suspension components should be performed before any parts are replaced.
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A defective EGR valve can cause a popping or knocking noise from the engine compartment. It is usually heard when the engine is warm (between 1600 and 1800 RPM).
A defective vehicle speed sensor can cause problems with the cruise control and speedometer operation, as well as erratic shifting. The connectors on the sensors are also susceptible to corrosion, which will create similar symptoms. Any of these problems can cause Check Engine Light illumination.
The overhead video screen may not power on, updating the video entertainment system software may be necessary to correct this concern.
A squeak heard while turning the steering wheel may indicate that the rubber boot seal on the steering shaft needs some trimming and lubrication.
Due to a problem with the rear drain, the sunroof may develop a leak into the passenger area. The drain tube can get kinked; tubing can be installed over the drain hose to prevent further problems.
Software updates are available to address transmission issues. However, due to the age of these vehicles, mechanical failures are more likely to be causing transmission problems. If a mechanical failure is repaired or the transmission is replaced, it is important to make sure any software updates have been taken care of. Failure to do so could result in continuing transmission issues.
There have been reports of premature head gasket failure; an updated gasket design is available to correct this problem.
On vehicles equipped with V6 engines, the Check Engine Light may illuminate and code P0339 is stored for intermittent loss of the crankshaft position sensor signal. Our technicians tell us that adding a shim to the crankshaft sensor will commonly correct this issue but in some cases the flex plate may require replacement.
A knocking sound my be heard from the engine at times with the air conditioning on. The cause could be the AC compressor itself, if that is the case there is an updated AC compressor to correct this issue.
Warm air only may be discharged from the AC system due to a faulty infrared temperature sensor.
A whistle sound may be noted from the glove box area when the AC system is in the "fresh air" mode. Our technicians tell us that updating the HVAC control module software will correct this issue.