Ebcm rebuild help
Thread Starter
Cruising
Joined: Mar 2026
Posts: 13
Likes: 1
Ebcm rebuild help
I recently had my ECBM replaced. The mechanic installed it and test drove the car with no ABS or traction control lights coming on. When I started the car myself, the lights appeared, but after turning the car off and back on, they went away. I showed him, and he scanned the car but found no codes. I also reset the codes and drove for about an hour in stop-and-go traffic with no warning lights. When I got home and restarted the car, everything was still fine.
However, about a week later, the ABS and traction control lights came back on when I started the car again. When I turned it off and restarted it, the lights went away—just like before. I’m not sure what the issue could be or what to do next.
I've been getting codes like B0-RFA C2105 and C2115. Also have been getting "serv tire mon sys" which I guess is the sensor going bad or it only showed up bc the car didn't have the ECBM and needs to relearn.
However, about a week later, the ABS and traction control lights came back on when I started the car again. When I turned it off and restarted it, the lights went away—just like before. I’m not sure what the issue could be or what to do next.
I've been getting codes like B0-RFA C2105 and C2115. Also have been getting "serv tire mon sys" which I guess is the sensor going bad or it only showed up bc the car didn't have the ECBM and needs to relearn.
Tech Contributor
Joined: Jan 2007
Posts: 19,450
Likes: 1,155
From: Dyer, IN
I recently had my ECBM replaced. The mechanic installed it and test drove the car with no ABS or traction control lights coming on. When I started the car myself, the lights appeared, but after turning the car off and back on, they went away. I showed him, and he scanned the car but found no codes. I also reset the codes and drove for about an hour in stop-and-go traffic with no warning lights. When I got home and restarted the car, everything was still fine.
However, about a week later, the ABS and traction control lights came back on when I started the car again. When I turned it off and restarted it, the lights went away—just like before. I’m not sure what the issue could be or what to do next.
However, about a week later, the ABS and traction control lights came back on when I started the car again. When I turned it off and restarted it, the lights went away—just like before. I’m not sure what the issue could be or what to do next.
So the rest of the story.....https://www.corvetteforum.com/forums...need-help.html
You had a number of symptoms in your other thread:
Check engine light finally correlated to a P0171 DTC
DTCS for HVAC, BCM, ABS
The ignition key being "stuck and stiff in the lock cylinder preventing/limiting rotation + a B2723 DTC
We could have pursued the ignition switch further for the electrical implications, but you indicated you did not have the necessary expertise or tools to troubleshoot.
On the surface, it sounds like you replaced an EBCM for an ignition switch issue.
Melting Slicks
Joined: Dec 2018
Posts: 2,654
Likes: 1,386
From: Orange County, CA
When you have ABS/TC lights, you need to check fault codes while the lights are on and BEFORE turning the car off. The codes are clearing once the unit is powered down.
I had this behavior on my 2001 (codes would disappear when car was turned off then on). It was an intermittent C1214 which required "rebuild" of resoldering several solder joints on the circuit board.
I had this behavior on my 2001 (codes would disappear when car was turned off then on). It was an intermittent C1214 which required "rebuild" of resoldering several solder joints on the circuit board.
Thread Starter
Cruising
Joined: Mar 2026
Posts: 13
Likes: 1
I cannot find anywhere where you have disclosed what year your car is. All C5s are not the same.
The codes are for the tire pressure sensors, nothing to do with the EBCM....and the EBCM does not "learn" the tire pressure sensors.
So the rest of the story.....https://www.corvetteforum.com/forums...need-help.html
You had a number of symptoms in your other thread:
Check engine light finally correlated to a P0171 DTC
DTCS for HVAC, BCM, ABS
The ignition key being "stuck and stiff in the lock cylinder preventing/limiting rotation + a B2723 DTC
We could have pursued the ignition switch further for the electrical implications, but you indicated you did not have the necessary expertise or tools to troubleshoot.
On the surface, it sounds like you replaced an EBCM for an ignition switch issue.
The codes are for the tire pressure sensors, nothing to do with the EBCM....and the EBCM does not "learn" the tire pressure sensors.
So the rest of the story.....https://www.corvetteforum.com/forums...need-help.html
You had a number of symptoms in your other thread:
Check engine light finally correlated to a P0171 DTC
DTCS for HVAC, BCM, ABS
The ignition key being "stuck and stiff in the lock cylinder preventing/limiting rotation + a B2723 DTC
We could have pursued the ignition switch further for the electrical implications, but you indicated you did not have the necessary expertise or tools to troubleshoot.
On the surface, it sounds like you replaced an EBCM for an ignition switch issue.
Thread Starter
Cruising
Joined: Mar 2026
Posts: 13
Likes: 1
When you have ABS/TC lights, you need to check fault codes while the lights are on and BEFORE turning the car off. The codes are clearing once the unit is powered down.
I had this behavior on my 2001 (codes would disappear when car was turned off then on). It was an intermittent C1214 which required "rebuild" of resoldering several solder joints on the circuit board.
I had this behavior on my 2001 (codes would disappear when car was turned off then on). It was an intermittent C1214 which required "rebuild" of resoldering several solder joints on the circuit board.
Tech Contributor
Joined: Jan 2007
Posts: 19,450
Likes: 1,155
From: Dyer, IN
Pull codes from the DIC, I curious what you find.
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Thread Starter
Cruising
Joined: Mar 2026
Posts: 13
Likes: 1
It's just B0-RFA C2105 and B0-RFA C2115 in the DIC
Tech Contributor
Joined: Jan 2007
Posts: 19,450
Likes: 1,155
From: Dyer, IN
I had the car towed to the shop since I wasn't able to drive it. But I drove it home after which is an hour away from the shop and didn't stall and had to drive it back and forth for the abs/traction repair on a different day.
It's just B0-RFA C2105 and B0-RFA C2115 in the DIC
It's just B0-RFA C2105 and B0-RFA C2115 in the DIC
Thread Starter
Cruising
Joined: Mar 2026
Posts: 13
Likes: 1
Probably going to reach back out next week to him. I'm thinking it might be the wheel speed sensors but I wanted other people's opinions and ideas