Rschliebe Report post Posted June 26, 2018 New to the forum and ownership of a 2010 FFH. Car is great. First trip away from home we got a wrench light when traveling at highway speeds. As soon as I would turn off the ignition, it would go away. It would come back on at highway speeds. Not all of the time though. It was warmer (80's) for Washington State. I am concerned that maybe the battery was heating up. No change in performance of the vehicle. Just a bit concerning as we just purchased the vehicle. So far I am pretty impressed with the vehicle and love the challenge to see what mileage I can get. Quote Share this post Link to post Share on other sites
markwilson66 Report post Posted December 7, 2018 I get this too occasionally when driving for periods at 74-80 MPH. Like yours, it goes away as soon as the ignition is turned off.I've scanned for codes and there are no MIL on so I don't really worry about it. Quote Share this post Link to post Share on other sites
BIGREDRASA Report post Posted December 8, 2018 I had this issue at 75 MPH + on a hot day, couple of years ago. Shut car off and restarted, all OK. Back on the road, and light came on. Hooked up a code reader and got nothing. Somewhere I read that was a software issue having to do with coolant readings. Took to the dealer, they flashed the computer, no more problems. 1 markwilson66 reacted to this Quote Share this post Link to post Share on other sites
lolder Report post Posted December 9, 2018 I get this too occasionally when driving for periods at 74-80 MPH. Like yours, it goes away as soon as the ignition is turned off.I've scanned for codes and there are no MIL on so I don't really worry about it.Take it to Ford. There's a TSB that increases motor/electronics cooling pump speed. They are overheating as the car gets older and cooling system efficiency deteriorates. 3 rowekmr, markwilson66 and FordHEVtoy reacted to this Quote Share this post Link to post Share on other sites
X_916 Report post Posted February 13, 2019 I Know it's an older thread but I had to reflash PCM and reply electronic cooling system Quote Share this post Link to post Share on other sites
Jrpavv Report post Posted March 14, 2020 On 2/12/2019 at 11:01 PM, X_916 said: I Know it's an older thread but I had to reflash PCM and reply electronic cooling system Where you able to do this yourself with Forscan or did you have a dealer do it? Quote Share this post Link to post Share on other sites
redd_dog Report post Posted April 14, 2020 When I had the wrench light turn on under similar conditions, my auto mechanic said it was the water pump designated for the high-voltage battery was failing. He replaced the water pump, and I haven't seen the wrench light since--even on hot days when I would have seen the wrench symbol. This goes with the recommendation up in this thread to take the issue to a dealer or trained auto mechanic to fix it. Quote Share this post Link to post Share on other sites
