Coolant warning light, Engine management light
Thread Starter
Newbie
Joined: Nov 2023
Posts: 1
Likes: 0
GLC 220d
Coolant warning light, Engine management light
Dear All,
I have recently encountered an intermittent issue with my. 2019 GLC, whereby the coolant light comes on at circa 90 degrees Celsius, the engine management light turns on and fan runs very loudly
I have had a diagnostics undertaken, and the below codes have come up:
U121A87- communication with control unit 'fan' has a a malfunctiom
U069800- communication with the component 'coolant pump' has a malfunction
U069987- Communication with the component 'coolant pump' has a malfunction. The message Is missing
Power consumption of component M43/6 (low temperature circuit circulation pump' is not ok
U011564- Communication with control drivetrain has a malfunction. There is an implausable signal
I was wondering if anybody else had has these codes pop up suddenly which could be related to an overarching part of the loom/sensor or component.
Any help would be greatly appreciated
B
I have recently encountered an intermittent issue with my. 2019 GLC, whereby the coolant light comes on at circa 90 degrees Celsius, the engine management light turns on and fan runs very loudly
I have had a diagnostics undertaken, and the below codes have come up:
U121A87- communication with control unit 'fan' has a a malfunctiom
U069800- communication with the component 'coolant pump' has a malfunction
U069987- Communication with the component 'coolant pump' has a malfunction. The message Is missing
Power consumption of component M43/6 (low temperature circuit circulation pump' is not ok
U011564- Communication with control drivetrain has a malfunction. There is an implausable signal
I was wondering if anybody else had has these codes pop up suddenly which could be related to an overarching part of the loom/sensor or component.
Any help would be greatly appreciated
B
Last edited by B17ant; Nov 9, 2023 at 02:22 PM.
Newbie
Joined: Mar 2024
Posts: 1
Likes: 0
a class w177
Dear All,
I have recently encountered an intermittent issue with my. 2019 GLC, whereby the coolant light comes on at circa 90 degrees Celsius, the engine management light turns on and fan runs very loudly
I have had a diagnostics undertaken, and the below codes have come up:
U121A87- communication with control unit 'fan' has a a malfunctiom
U069800- communication with the component 'coolant pump' has a malfunction
U069987- Communication with the component 'coolant pump' has a malfunction. The message Is missing
Power consumption of component M43/6 (low temperature circuit circulation pump' is not ok
U011564- Communication with control drivetrain has a malfunction. There is an implausable signal
I was wondering if anybody else had has these codes pop up suddenly which could be related to an overarching part of the loom/sensor or component.
Any help would be greatly appreciated
B
I have recently encountered an intermittent issue with my. 2019 GLC, whereby the coolant light comes on at circa 90 degrees Celsius, the engine management light turns on and fan runs very loudly
I have had a diagnostics undertaken, and the below codes have come up:
U121A87- communication with control unit 'fan' has a a malfunctiom
U069800- communication with the component 'coolant pump' has a malfunction
U069987- Communication with the component 'coolant pump' has a malfunction. The message Is missing
Power consumption of component M43/6 (low temperature circuit circulation pump' is not ok
U011564- Communication with control drivetrain has a malfunction. There is an implausable signal
I was wondering if anybody else had has these codes pop up suddenly which could be related to an overarching part of the loom/sensor or component.
Any help would be greatly appreciated
B
Hi, I have a same problem with my Mercedes did you resolve your problem? Thanks for replay
Newbie
Joined: Jan 2025
Posts: 2
Likes: 0
C-Class W205 FL
Hi @B17ant
Did you find any solutions to the above fault codes? I've gotten the same fault too. unable to solve, was hoping you have found a solution to the above faults.
Regards,
Kel
Did you find any solutions to the above fault codes? I've gotten the same fault too. unable to solve, was hoping you have found a solution to the above faults.
Regards,
Kel
Last edited by KLCT_w205; Jan 5, 2025 at 04:11 AM.
