Thoughts on cause? 10 codes along with rare loss of power while driving
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Joined: May 2020
Posts: 247
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From: Fort Worth
2005 CL55 AMG || 2005 CL65 AMG || 1989 560SEC
Thoughts on cause? 10 codes along with rare loss of power while driving
Odd case, thinking through it.
This only happens on the freeway, and only while using cruise or manually maintaining a steady speed. If I'm driving aggressively the issue never manifests, verified over several 2-400 mile trips.
The engine loses 95%+ of its power, barely able to maintain the current speed, and incapable of accelerating more than about 5mph from the speed I was maintaining before trying to accelerate. Flooring the accelerator results in one to two gear drops with either a slight increase in speed, or a reduction. Similar in feeling to starving a carburated engine of fuel, or pulling the choke while driving.
No misfires, just extreme bogging down.
Restarting the car solves the issue (parked, or in Neutral while in motion), but I've never had any codes that persist after restarting.
It happened again this week, so I maintained speed and ran the code reader, yielding 10 codes, 9/10 of them CANBUS comm/timeout faults, which showed as historic this time:
P2602 Voltage supply of valves is faulty
2310 CANBUS, N47-5 control unit communication with CANbus issue
2311 One or more messages from the ECU are not available on the CAN bus
2312 one or more messages not available on the CANbus (ECU)
2313 one or more messages from unit A80 not available on CANBUS (electronic selector lever module control unit)
2314 one or more messages... Unit N370 (EIS/EZS control unit)
2315 one or mote messages... Unit A1 (maybe? readout cut off on diag screen) Instrument cluster
2316 one or more messages from unit A1 (instrument cluster) not available on CANbus
2318 one or more... Unit A80, intelligent servo module module
2300 Communication with other control units installed in this vehicle not possible (Bus OFF fault)
I'll be poking around, as the car has a new TCU (flashed) and trans connector bushing. Will try cleaning module connections with electric spray also. I've been searching for similar instances in others' cars, but not much loss. I do think the engine has been out of this car at some point, unless exhaust mainfold bolts are known to spontaneously back out on their own.
Any thoughts? I'm thinking it's a ground issue, or module/module connector issue.
This is in a CL65.
This only happens on the freeway, and only while using cruise or manually maintaining a steady speed. If I'm driving aggressively the issue never manifests, verified over several 2-400 mile trips.
The engine loses 95%+ of its power, barely able to maintain the current speed, and incapable of accelerating more than about 5mph from the speed I was maintaining before trying to accelerate. Flooring the accelerator results in one to two gear drops with either a slight increase in speed, or a reduction. Similar in feeling to starving a carburated engine of fuel, or pulling the choke while driving.
No misfires, just extreme bogging down.
Restarting the car solves the issue (parked, or in Neutral while in motion), but I've never had any codes that persist after restarting.
It happened again this week, so I maintained speed and ran the code reader, yielding 10 codes, 9/10 of them CANBUS comm/timeout faults, which showed as historic this time:
P2602 Voltage supply of valves is faulty
2310 CANBUS, N47-5 control unit communication with CANbus issue
2311 One or more messages from the ECU are not available on the CAN bus
2312 one or more messages not available on the CANbus (ECU)
2313 one or more messages from unit A80 not available on CANBUS (electronic selector lever module control unit)
2314 one or more messages... Unit N370 (EIS/EZS control unit)
2315 one or mote messages... Unit A1 (maybe? readout cut off on diag screen) Instrument cluster
2316 one or more messages from unit A1 (instrument cluster) not available on CANbus
2318 one or more... Unit A80, intelligent servo module module
2300 Communication with other control units installed in this vehicle not possible (Bus OFF fault)
I'll be poking around, as the car has a new TCU (flashed) and trans connector bushing. Will try cleaning module connections with electric spray also. I've been searching for similar instances in others' cars, but not much loss. I do think the engine has been out of this car at some point, unless exhaust mainfold bolts are known to spontaneously back out on their own.
Any thoughts? I'm thinking it's a ground issue, or module/module connector issue.
This is in a CL65.
