You’ll likely see P0171 and P0300 when there’s a vacuum leak. Popular Mechanics: How to find a vacuum leak. This will cause the cylinders to misfire, and it’ll throw P0302 if the leak is around that specific cylinder on the intake manifold. Vacuum leak– If your Escape has a vacuum leak, it can be difficult for the PCM to get the right air/fuel mixture.You’ll likely see P0171 and/or P0202 with a bad injector. Here’s a good video on how to diagnose an injector it can be a little tricky. Bad Fuel Injector– If you have a fuel injector that has failed, it won’t be able to properly atomize fuel, and you’ll get P0302.Coil Packs– Coil packs rarely go bad, but when they do, they can cause P0302 in your Ford Escape.Here’s how to tell if your plug wires are bad (video). Spark Plug Wires– On most modern engines, the plug wires are not nearly as long as they once were (if your vehicle even has them), but they can still go bad.Here’s a great video on verifying a spark plug is bad. That being said, a bad spark plug is the number one offender when it comes to P0302. Your Escape likely has iridium plugs that need to be changed very infrequently. Look at the electrodes and see if they are in good shape. Bad Spark Plugs– A fouled spark plug is the most common cause of P0302.They are presented somewhat in order from most to least likely to be causing P0302: The spark plug to the left was bad enough to cause a bad backfire. Here are the most common problems that may cause misfiring. There are quite a few things that can cause the P0302 trouble code to trigger in the Ford Escape. You may smell raw gas coming from the tailpipe.Your Escape may produce excess vibration, especially at lower RPM.It depends on how serious the misfire is. The vehicle itself may begin to run rough.Here are the most common symptoms of P0302 in the Ford Escape. If one of the above variables is off, your Escape’s second cylinder will misfire, or it won’t fire at all. Compression– The air-fuel mixture must be compressed during the engine’s power stroke.Spark– The spark plug needs to fire at the right time and at the right temperature.Air– It needs to be metered by your Escape’s mass air flow sensor or MAP sensor, so the powertrain control module (PCM) knows exactly how much air to let into the combustion chamber.Fuel– In the right quantity (around 14.7 parts air to one part fuel).In order for an engine to burn fuel efficiently, each cylinder needs: A quick google image search will confirm the correct cylinder (include your Escape’s model year and engine type). On “V” configuration engines, it’ll usually be the first cylinder on the head further back from the front of the engine. P0302 is a cylinder-specific misfire code, meaning it’s only the second cylinder that has a misfire. P0302 Meaning: Cylinder 2- Misfire Detected Cylinder 2 The most common fix for P0302 is to replace the spark plugs, coil packs, or (if equipped) plug wires. It also can cost money to ignore it, since driving with a misfire can damage the Escape’s catalytic converter. Unlike a lot of the OBDII codes, this code has to do directly with engine combustion. ![]() Repairing P0302 should be considered a high priority. If it’s bad enough to cause your Escape’s check engine light to come on, you shouldn’t drive your vehicle at all. P0302 is a real drivability concern and should be dealt with right away. ![]() It indicates that your vehicle’s second cylinder has a misfire. P0302 in the Ford Escape is a common OBD II trouble code.
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