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How to Fix P20C2 Code on Ford: DEF Pump Malfunction Troubleshooting
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Alright folks, let’s break down the P20C2 code that a lot of Ford truck owners, especially with diesel engines, have been running into lately. The DEF system is there to reduce harmful emissions, but when it throws the P20C2 code, that means there’s a problem with the DEF pump itself. Most of the time, this error is triggered by a malfunction in the DEF pump or its sensors, causing issues with the fluid delivery to the exhaust system.

Here’s how you can troubleshoot and fix it:
  1. Check the DEF Level: Yeah, sounds basic, but you’d be surprised how often it’s just low fluid. Check the tank first.
  2. Inspect the Pump: Look for any visible signs of wear, cracks, or leaks in the DEF pump.
  3. Sensor Check: The DEF system has multiple sensors. You might need to run a diagnostic tool to see if one is faulty. Replacing a sensor is way cheaper than the whole pump.
  4. Reset the Code: Sometimes, it could be a temporary glitch, especially in colder weather. Try resetting the code using an OBD-II scanner and see if it comes back.

If you’ve done all that and the problem persists, it might be time to replace the DEF pump. Luckily, it’s a pretty straightforward job for a DIYer, though you’ll want to consult your service manual for specifics based on your Ford model. Hope this helps and keeps you from spending big bucks at the dealership!
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