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my Launch Cready Elite Benz, with latest updates, is showing a couple codes on my wife's 2016 E350, P066500 and P066300, which are "The actuation for the switchover valve of the intake manifold (cyl bank 2) has a short to positive" and "The actuation for the switchover valve of the intake manifold (cyl bank 2) has an electrical fault or an open circuit"
no check engine light. I clear these codes, restart the engine, and they come right back. Eyeballed what I could see under the hood, and I don't see any bad wiring, rodent damage or whatall. I keep bags of peppermint/balsam rodent repellant under the hood as I've lost cars to this before.
My indie mechanic wants to run a xentry scan, but needs an appointment and will be billing me for this.
Try to use the ACTUATION feature on the Launch, see does the switchover valve actually move the vacuum actuator ( must have vacuum pressure first ) it serves or make its electromagnetic click-click sound ?
This is a vacuum stop valve or solenoid Y77/2 and Y77/3 you speak of ?
Vacuum hand pump kit can troubleshoot it easy.
Bank 1 is always based on Cylinder 1 in that bank.
M276.xxx , same as M278, M272, and M273 , the cylinder 1 or Bank 1 is at the RIGHT SIDE bank of the engine as viewed from inside the car towards engine bay.
Bank ID using cylinder #1 is also good in a Front Wheel Drive car using V6, like Toyota Camry with its transverse mounted engine.
I wonder if some people may call them as : inner/firewall bank and outer/radiator bank ?
The engine bank2 is on the US driver side with Cyl.4-5-6. intake valve actuator
Both DTC complain about the same electric valve not being in-circuit. The ECU is reporting what it is sensing through its control lead.
primary concern would be a connector issue... either broken, popped off or dirty...
when is the last time this engine was worked on for sparkplugs or oily Cam sensors replacement at that time this DTC may have been created.
hmmm, it had a ~56K 'B' service not long ago, but I don't believe spark plugs were part of that. I don't think its had any issues with oily cam sensors. its a late 2016 build
for whatever its worth, this is NOT lighting the check engine light, I just see the codes on my Launch Cready Elite Benz, with the latest firmware. I assume those flaps are similar to the ones on my old M104, they lengthen or shorten the intake manifold to optimize for different RPM ranges?
hmmm, it had a ~56K 'B' service not long ago, but I don't believe spark plugs were part of that. I don't think its had any issues with oily cam sensors. its a late 2016 build
for whatever its worth, this is NOT lighting the check engine light, I just see the codes on my Launch Cready Elite Benz, with the latest firmware. I assume those flaps are similar to the ones on my old M104, they lengthen or shorten the intake manifold to optimize for different RPM ranges?
MB intake runner used to have internal failure with broken plastic actuator but your two DTC faults strictly point to open electrical circuit, nothing about actuator travel or missing vacuum from the popular failed check-valve in vacuum pump.
If the connector looks fine ohm out the solenoid itself to read less than say 50ohms.
Hopefully parts are available aside from complete intake 🤞
09-20-2024, 04:16 PM
