* Transmission Fluid Level and Condition: The most common cause is low or dirty transmission fluid. Check the fluid level using the dipstick (engine running and warmed up). If the level is low, you likely have a leak somewhere. If the fluid is dark, burnt, or smells burnt, it needs to be changed (and potentially the filter as well). Low fluid can severely damage the transmission.
* Transmission Solenoid Issues: These electrical components control various functions within the transmission. A faulty solenoid can cause the overdrive light to blink. This usually requires professional diagnosis and repair.
* Transmission Sensor Problems: Various sensors monitor the transmission's operation. A malfunctioning sensor can trigger the blinking light. Again, professional diagnosis is needed.
* Internal Transmission Problems: This is the worst-case scenario. Worn clutches, damaged planetary gears, or other internal components can cause the overdrive light to blink. This often leads to costly repairs or a transmission replacement.
* Wiring Harness Problems: A damaged or corroded wire in the transmission's electrical system can also cause this issue.
What you should NOT do:
* Continue driving extensively: Driving with a blinking overdrive light puts significant stress on your transmission and could cause irreparable damage.
* Try to fix it yourself (unless you're a skilled mechanic): Automatic transmissions are complex. Incorrect repairs can worsen the problem.
What you SHOULD do:
1. Check the transmission fluid level and condition immediately. This is the quickest and easiest check.
2. Have a mechanic diagnose the problem. A professional can use diagnostic tools to pinpoint the exact cause of the blinking overdrive light and recommend the appropriate repair. Ignoring it will likely lead to a more expensive repair later on.
3. Consider the age of the vehicle: A 1995 car is quite old. The cost of repairs might be substantial compared to the value of the vehicle. A thorough assessment from a mechanic will help you determine if repair is economically feasible.
In short, a blinking overdrive light is a serious warning sign. Don't delay getting your Mazda 626 checked by a qualified mechanic.
