VOLVO
ECM-P049C00 - Exhaust Gas Recirculation B Flow Excessive Detected. General Failure Information. No sub type information
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
2 modelsS80 (2007–), V70 (2008–)
Show models by year and engine (2)
What does this fault code mean?
The code indicates that the flow through the EGR system is too large. The engine control module (ECM) monitors EGR control and sets the code when a fault is found in the EGR valve or its wiring. The fault is checked with the engine running, and the car may show no symptoms to the driver.
Possible causes
- Contact resistance, looseness or oxidation in the connections to the EGR valve
- The EGR valve sticks because of dirt or soot
- Break in the wire to the EGR valve
- Air leak in the intake system
- Damaged EGR valve
What you can do
- 1With the ignition off, inspect the intake system for air leaks and damage
- 2Check the fuses for the EGR system. Their location is given in the owner's manual
- 3Check the connectors to the EGR valve for looseness and oxidation, and remedy as needed
- 4Clean the EGR valve of dirt and soot and check that it does not bind
- 5Use a multimeter to check that the wire to the EGR valve has no break
- 6Replace a damaged EGR valve, have a workshop adapt it and clear the code
Symptoms you may notice1
- No noticeable symptoms for the driver
General guidance for car owners. Diagnosis on the car can point to a different cause.