What is the solution for Ford Focus EGR valve failure?
2 Answers
The phenomenon of EGR valve sticking or open circuit is relatively common in sedans, with the fault code being P1404. First, it is necessary to illuminate the 'Check Engine' light on the dashboard to alert the driver to take the vehicle to a repair shop for inspection as soon as possible.
EGR valve failure is quite common on the Focus, typically caused by carbon buildup jamming the valve, leading to the engine warning light or power loss. I've repaired it several times. The first step is to use an OBD diagnostic tool to read the fault code, such as P0401, to confirm the issue. Next, remove the EGR valve, thoroughly spray the valve body and intake passages with carburetor cleaner to remove carbon deposits, and scrub the interior with a small brush. Reinstall it and start the engine to test for smooth operation. If cleaning doesn’t work, the valve may be internally damaged, and replacing it with a new one is recommended. During installation, ensure the seal is properly positioned to prevent leaks. Long-term use of low-quality fuel accelerates carbon buildup, so regularly adding fuel system cleaner helps prevent it. The entire process requires patience to avoid damaging other components during disassembly. It’s best to perform this in a garage for safety.
