Will a bad fuel injector effect the transmission?

Hi, my name is Devin. I'm an auto repair expert with the Car Genius team at RepairPal. I'm so sorry to hear you’re having trouble with your vehicle. A bad fuel injector can cause the engine to run poorly, which might put your Mountaineer into "limp mode". When in limp mode, the computer will limit gear range and rpm to prevent damage to the engine. However, the transmission issues you're experiencing, like slipping and not shifting out of 1st gear, could also be related to the transmission itself. It's crucial to address the fuel injector issue, but I recommend having both the engine and transmission checked by a professional to identify the exact cause. If you need more advice, have any other questions about your vehicle, or would like to get connected to a RepairPal Certified shop near you, we have you covered. Give us a call at 877-913-1554, and we will happily help you out!