Dec 19, 2018 · EGR valve failures causing the code P0401 were common in the Mazda CX-7 vehicles with a 2.3L turbo engine. In many Mazda/Ford 4-cylinder engines, the code P0401 can be caused by a sticking EGR valve. The EGR valve must be replaced to repair the problem. Not all EGR problems are caused by a failed EGR valve. There appear to be 2 major reasons for turbocharger failure and Mazda CX-7 issues. The 2.3L petrol has 1) has known issues with the VVT actuator and 2) the motor runs hot. Both contribute to turbocharger issues and can cause complete engine failure. The VVT actuator uses oil pressure to change camshaft positions in the engine. The turbo appears not to be the only major weakness of the petrol 2.3L CX7. Another is a problem with the timing chain and over-revving of the VVTi engine, as well as excessive heat build up. Additionally, owners complain of poor mileage from the vehicle even on open road / highway driving from the turbo 2.3L engine. Aug 29, 2022 · A faulty fuel pump can affect the turbocharger of the Mazda CX-5 in several ways. First, it can cause the engine to run lean, which can damage the turbocharger. Second, it can cause the engine to misfire, which can also put more stress on the turbocharger. Finally, it can cause the engine to overheat, which can lead to engine failure and damage Nov 19, 2011 · Failure Date: 01/19/2012. The 2. 3 liter 4 cylinder l3t engine that is in my wife's 2007 Mazda Cx-7 has a bad variable valve timing actuator which was verified today by dual Mazda of jacksonville florida. A warranty extension was issued by Mazda around the 14th of January 2012 following the initial TSB (technical service bulletin) date 23 Worst 2008 Mazda CX-7 Problems #1: Engine Failure 2008 CX-7 Average Cost to Fix: $5,000 Average Mileage: 107,000 mi. Learn More #2: Turbocharger Failed 2008 CX-7 Average Cost to Fix: $4,500 A lack of power may develop due to a failed turbocharger. Failed turbochargers will require replacement to restore engine power. 313 people reported this problem 133 comments Mazda CX-7 Vehicles With This Problem 6 model years affected 2007, 2008, 2009, 2010, view all Average mileage: 92,834 (15,500–177,000) DGexq1g.

mazda cx 7 turbo failure symptoms