Monday, August 13, 2012
Honda Pilot EX 3.5L Codes: P0300, P0301, P0302, P0303, P0304, P0305 and P0306
VEHICLE: 2006 Honda Pilot EX 3.5L, V6, MFI, SOHC, Eng Desg J35A9
Multiple engine misfires. Codes: P0300, P0301, P0302, P0303, P0304, P0305 and P0306.
1. Check the Exhaust Gas Recirculation (EGR) valve voltage on the scan tool, it should be 1.25 V when the EGR valve is closed. Sometimes the valve will stick, causing a rough idle.
2. If the engine misfires when driving, block or unplug the EGR valve and see if the problem goes away. If the problem goes away, check for a faulty EGR valve or EGR distribution problem.
3. Load test each ignition coil and see if one is breaking down intermittently. One faulty ignition coil can set all 6 misfire codes. Also verify the spark plugs are good.
4. If the engine misfires at idle and it's not an ignition coil issue or a lean problem, it is common for the valve to get tight and cause a rough idle with misfire codes.
Exhaust Gas Re-Circulation (EGR) Control Valve
Tight Engine Valves
Cleaned Exhaust Gas Recirculation (EGR) Passages
2006 Honda Pilot EX 3.5L Codes: P0300, P0301, P0302, P0303, P0304, P0305 and P0306