Q: Over drive light is blinking & not shifting into overdrive

This seems to be a fairly common problem (https://www.yourmechanic.com/book/?mktg_jid=344) with the 2013 Optima. It may be caused by incorrect calibration of the Steering Angle Sensor or it may be related to a mechanical issue with the suspension or tires. I...

Hello. The heat issue that you have with the van sounds like you have a blend door issue under the dash. As for the vibration I usually check to see if the idle is getting too low when the AC...

Hello there. The knock sensor code (https://www.yourmechanic.com/article/is-it-safe-to-drive-with-a-faulty-knock-sensor) can have various causes on your 2004 Chevrolet Silverado. The knock sensor circuit low, bank 1 code is telling us that the knock sensor in bank 1 that it has low circuit voltage....

Hello - most likely, these creaking noises (https://www.yourmechanic.com/services/creaking-noise-when-turning-the-steering-wheel-inspection) are coming from the front strut bearing plates. This is a common worn suspension noise, especially in cold weather. I would recommend a front suspension inspection (https://www.yourmechanic.com/services/brakes-steering-and-suspension-inspection) by a mobile, professional mechanic,...

I can think of a couple of things that could potentially be causing this issue. If you have an intake manifold gasket leak near the number four cylinder, this can cause the cylinder to misfire. If the number four cylinder's...

The wiring in the door could be shorted to the door or they may not be hooked up properly. If the wiring is good, then the BCM (Body Control Module) may need to be flashed (reprogrammed). If you need further...

Hi there. Typically when you have an inconsistent power issue with accessories like a radio, lights and other components, it's due to a loose ground wire or a faulty electrical relay. It could also be caused by battery cables that...

A faulty or blown fuse in other electronically controlled systems can cause the IAC motor to malfunction, leading to a higher than normal engine idle speed. Other possible causes of a high idle include vacuum leaks, a malfunctioning throttle (throttle...

Your vehicle uses the AX4S Ford transmission. Inasmuch as you have the 3.8L motor, your transaxle model number is PNA-WC. The Ford service part number for that transaxle is F68Z-7000-AARM. If you are having trouble with your transmission be sure...