First, use a bidirectional scan tool to. 🚨 check engine light on with code p0401 Although my jeep is the diesel, this information might carry over for any jeep owner experiencing multiple cel or random lights on the dash
2007 Jeep Rubicon
The p0401 code for jeep vehicles indicates that there is a problem with the exhaust gas recirculation (egr) system's performance
The egr system is responsible for reducing nitrogen oxide emissions.
Is your jeep throwing the p0401 engine code Engine running for greater than two minutes with the engine coolant temp greater than 70°c (158°f) Only reason was i did my engine oil cooler recently and i upgraded it to the aluminum housing and then the light came on, so i thought i missed something It never had the p0401 before.
The most common fix is replacing the. Learn what dtc p0401 means, its common causes, symptoms, and how to fix “egr flow insufficient” issues Practical guide for diesel truck owners. I've replaced my egr valve before (about 50k miles ago), but i'm pretty sure i also now.
