It may have occurred to you that the overdrive light on your Ford Explorer flashes intermittently. When this light flashes, there is a transmission problem that needs to be addressed.
Check out this article to find out why your overdrive light flashes, how to fix it, and what causes it. Come on, let’s start!
- Activates limp mode when there is an issue with the transmission
- Once the light flashes, stop driving safely
- Repairs must be thoroughly diagnosed before they can be attempted
- The failure of the system is at risk if the problem is ignored
- The usual starting points are fluids, seals, and solenoids
- Specialized shops are best for complex hydraulics
Ford Explorer Overdrive Light – What Does It Mean?
When there is a problem with the transmission, the overdrive light (O/D) on the Ford Explorer will turn on. An overdrive transmission allows relaxed cruising at high speeds to maximize fuel efficiency.
There is a problem preventing the overdrive from engaging when the overdrive light flashes. To protect itself from damage, the transmission enters “limp mode” or a failsafe operation when the light flashes.
When the transmission is in limp mode, some gears are unavailable and the transmission shifts differently. The performance and fuel economy will usually be affected.
A flashing O/D light can indicate a variety of diagnostic trouble codes
| DTC | What the fault is | Reasons for occurrence |
| P0740 | Problems with torque converter clutches | The TCC solenoid is bad, there’s not enough fluid, there’s a wiring problem |
| P0753 | A circuit for controlling overdrive valves | Valve body failure, solenoid failure |
| P0755 | Incorrect ratio for second gear | Valve body damage, worn clutches, damaged gears |
| P0758 | Solenoid control fault on 2nd and 3rd shifts | Wiring issues, bad solenoid |
| P0731, P0732 | Ratios of the first and second gears are incorrect | Slippage in the gears, damage to the gears |
| P0733, P0734 | Ratio of third and fourth gears is incorrect | Weakening clutches and bands, hydraulic leaks |
| P1744 | Mechanical failure of a torque converter | A leaky seal on the pump seal, converter failure |
Overdrive light flashing on Ford Explorer: common causes
The overdrive light can flash due to several common issues. The following are the most common causes:
- The solenoids or connectors of the transmission are faulty
- Fluid level is low in the transmission
- Liquid leaks from transmissions
- Sensors malfunctioning in transmissions
- Bands and clutches that are worn out causing slippage
- Errors with torque converters
- A leaking seal or a defective valve body
- Issues with control modules
During transmission gear engagement, solenoids are operated hydraulically.
In the event of a solenoid or connector failure, shifting is negatively affected. For smooth gear changes, there is insufficient hydraulic pressure due to low fluid levels.
A leak reduces pressure and allows contaminants to enter, which accelerates wear. Gear changes are hampered by slipping clutch materials.
Transmission control modules monitor transmission operation. When something out of the ordinary happens, the overdrive indicator is illuminated.
The malfunction of electrical components, such as bad sensors and wiring, can unnecessarily trigger limp mode.
Overdrive Light Flashing? Here’s How To Fix It
You can pinpoint the source of overdrive light blinking in your Ford Explorer by following these diagnostic steps:
- The Powertrain Control Module contains Diagnostic Trouble Codes (DTCs) that can be accessed by scanning for trouble codes. The starting point is simplified when a code indicates a specific sensor or solenoid.
- Ensure that the transmission fluid is at a good level and in good condition. Add more fluid if necessary and check its color. Translucent red is the color of fresh fluid. Developing a brownish discoloration in the fluid may be indicative of excessive heat or oxidation caused by slippage.
- Watch each gear while driving– If you observe delayed shifts, harsh gear engagements, or higher RPMs between shifts, you could be experiencing slippage. Make sure the trouble codes match when issues arise.
- Inspect the cooler line, hoses, pan, and seals for leaks. For an easier time spotting leak sources with a UV inspection light, use fluorescent dye in the transmission if necessary.
- Try resetting the computer if the codes were set erroneously – The DTCs will be cleared and you will be able to see if issues persist.
- Whenever codes point to sensor, solenoidal, or electrical connector issues, check them.
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Fixes that could be implemented
You can proceed with the appropriate repair once you’ve identified the root cause:
- In the absence of any underlying issues, reset the computer adaptive programming
- Solenoid or gear replacement
- Wiring or connections that are shorted or corroded should be repaired
- Seals and gaskets that are worn should be replaced
- Bands and clutches that are worn out should be replaced
- Replace torque converters
- Damaged valve bodies should be swapped
- A fluid service that was overlooked can cause contamination
- Components that control fluid pressure should be replaced
- In the case of a faulty control module, repair or replace it
Through methodical diagnosis, you can determine exactly what needs to be repaired.
There may be no need to replace solenoids if leaks are simply sealed, calibrations updated, or solenoids replaced at an affordable price.
You’ll have to undertake a major overhaul or replacement if irreparable transmission damage occurs as a result of ignored maintenance.
