bloated liver Posted October 17, 2017 Report Share Posted October 17, 2017 Hello, I ended up driving through a flooded viaduct and after coming out on the other side, I heard what sounded like a hole in the muffler. Next day, I took it to a muffler shop and they told me/showed me that the flex pipe needed to be replaced and I approved. After getting the car back, I ran an errand and throttled up to 45-50 mph when the Check Engine link began to flash/blink. I put it in neutral and pulled off the road to check. Engine sounded fine. Oil was full. No abnormal smells, vibrations, etc. Car sounded fine and the light went off so I went on my way. This morning the light came on again after passing a car at roughly 40-45mph. This time the car was somewhat hesitant to accelerate and the engine felt sluggish. After 45 seconds, the condition went away and the car experienced no further issues. My question is would the exhaust repair trigger some type of code to cause the light to come on? Is there a sensor in between the flex pipe repair that the mechanic could have possibly forgot to reconnect? Could an incorrect repair set the light off? Or could this be just a coincidence of two separate issues occuring at the same time? BTW, I have a dealer appt tomorrow to get a scan. Any thoughts/recommendations would be highly appreciated. Car details - 2011 Ford Edge Ltd. AWD, 3.5L w/approx 88k miles. Daily driver. Quote Link to comment Share on other sites More sharing options...
akirby Posted October 17, 2017 Report Share Posted October 17, 2017 Could be a messed up O2 sensor either from the repair or the water itself. How deep was it? 1 Quote Link to comment Share on other sites More sharing options...
bloated liver Posted October 18, 2017 Author Report Share Posted October 18, 2017 Top of the wheels. I checked the engine compartment after driving through but it didn’t appear wet. Not sure if it did get wet and evaporated from the heat. Is the O2 sensor higher up by the throttle bodyAir cleaner? Quote Link to comment Share on other sites More sharing options...
omar302 Posted October 18, 2017 Report Share Posted October 18, 2017 You should get an OBD2 scanner to read the codes. It will pay for itself. Also, if the wheels were submerged by water, it is highly recommended (maybe necessary even) to change the PTU & rear diff oils ASAP. Also expect your wheel bearings to wear out much quicker. 1 Quote Link to comment Share on other sites More sharing options...
enigma-2 Posted October 18, 2017 Report Share Posted October 18, 2017 Ford requires the PTU and rear axle fluid to be changed after driving through a flooded street. These are vented assemblies and water will reduce the lubricating properties by q very large margin. 1 Quote Link to comment Share on other sites More sharing options...
WWWPerfA_ZN0W Posted October 18, 2017 Report Share Posted October 18, 2017 PTU definitely needs checked, but when you have a CEL, you should pull codes first to see what the computer thinks might be wrong. Which is what you are doing, so please update when you have results. These cars are electronically heavy, so it definitely could have been "wet wiring" that just needed time to dry out. Just remember, this is akin to a flooded condition, however temporary, so hopefully water did not get into any of the internal wiring or fuse boxes. Might work fine now, but could experience random glitches further down the road. Quote Link to comment Share on other sites More sharing options...
akirby Posted October 18, 2017 Report Share Posted October 18, 2017 Top of the wheels. I checked the engine compartment after driving through but it didn’t appear wet. Not sure if it did get wet and evaporated from the heat. Is the O2 sensor higher up by the throttle bodyAir cleaner? The O2 sensors are in the exhaust just before and after the catalytic converter. You definitely need to get the codes read to see where to start. 1 Quote Link to comment Share on other sites More sharing options...
bloated liver Posted October 18, 2017 Author Report Share Posted October 18, 2017 Thank you all for the feedback. Went to the dealer and of course, no codes could be found. Will definitely have the PTU and O2 sensor checked 1 Quote Link to comment Share on other sites More sharing options...
enigma-2 Posted October 18, 2017 Report Share Posted October 18, 2017 If the dealer states that they can't change the fluid in the PTU and a new PTU must be installed, know that another dealer may be willing to change it. Also, most if not all transmission shops will change it. (Fluid has to be pumped out of the fill hole). 1 Quote Link to comment Share on other sites More sharing options...
WWWPerfA_ZN0W Posted October 18, 2017 Report Share Posted October 18, 2017 A flush or multiple drain/fills would be a must in a contaminated ptu situation. Quote Link to comment Share on other sites More sharing options...
bloated liver Posted October 20, 2017 Author Report Share Posted October 20, 2017 Good morning, OP here with a followup/resolution. I took my car to another Ford dealer and they retrieved the code that caused the check engine light to come on. Long story short the #6 cylinder was misfiring, so they recommended replacing the ignition coil and getting a tune up that included replacing the spark plugs. This problem was unrelated to the flooded waters I drove through. As for my flood damage concerns, aside from having the flex pipe repaired, Ford recommended servicing the trans fluid (flush), rear axle service, and power steering (flush). Oh and of course, my battery (over six years old) didn't pass the battery check test so I had that replaced as well. Just a quick thanks to all of you who provided their recommendations. When it comes to cars, I'm not mechanically savvy and sometimes it's difficult knowing what questions to ask. 1 Quote Link to comment Share on other sites More sharing options...
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