P0403 Mercedes-benz -

Question

Mercedes benz cls 550 2011 fair senso p0403 herp

Answer 1

Hi there,

This code points towards an issue with the exhaust gas recirculation. This could be caused by a fault with the EGR volume control solenoid valve or faulty wiring. Here is some more info for you.

P0403 MERCEDES-BENZ - Exhaust Gas Recirculation Circuit Malfunction

Read more: https://www.autocodes.com/p0403_mercedes-benz.html