I Think It Finally Happened...
Thread Starter
Instructor
Joined: Jul 2011
Posts: 198
Likes: 0
From: Hemet California
I Think It Finally Happened...
It was the weirdest thing...I started my car tonight and it seemed to rev up really high, and then the revs kept bouncing from about 500 to 1500. Before I shut it down, the messages "Reduced Engine Power", and "Service Traction" came up.
When I restarted the car, I didn't get any messages, and it idled fine, but the check engine light was on. So when I got home, I pulled the codes, and heres what came up:
10-PCM - p1516 H Command vs Actual Throttle Position Performance (TAC Module)
28-TCS - c1255 H EBTCM Internal Malfunction
c1278 H TCS Temporarily Inhibited By PCM
So what I'm thinking is that my EBCM(?) unit finally went out... Could someone please elaborate on what exactly these codes mean, before I take it in to Chevy, so I kind of know what I'm in for? That would be awesome.
If it's of any importance, the corvette is a '98 with about 63,000 miles. Oh, and it doesn't have active handling.
When I restarted the car, I didn't get any messages, and it idled fine, but the check engine light was on. So when I got home, I pulled the codes, and heres what came up:
10-PCM - p1516 H Command vs Actual Throttle Position Performance (TAC Module)
28-TCS - c1255 H EBTCM Internal Malfunction
c1278 H TCS Temporarily Inhibited By PCM
So what I'm thinking is that my EBCM(?) unit finally went out... Could someone please elaborate on what exactly these codes mean, before I take it in to Chevy, so I kind of know what I'm in for? That would be awesome.
If it's of any importance, the corvette is a '98 with about 63,000 miles. Oh, and it doesn't have active handling.
Burning Brakes
Joined: Jan 2011
Posts: 1,062
Likes: 291
From: Allyn WA
It was the weirdest thing...I started my car tonight and it seemed to rev up really high, and then the revs kept bouncing from about 500 to 1500. Before I shut it down, the messages "Reduced Engine Power", and "Service Traction" came up.
When I restarted the car, I didn't get any messages, and it idled fine, but the check engine light was on. So when I got home, I pulled the codes, and heres what came up:
10-PCM - p1516 H Command vs Actual Throttle Position Performance (TAC Module)
28-TCS - c1255 H EBTCM Internal Malfunction
c1278 H TCS Temporarily Inhibited By PCM
So what I'm thinking is that my EBCM(?) unit finally went out... Could someone please elaborate on what exactly these codes mean, before I take it in to Chevy, so I kind of know what I'm in for? That would be awesome.
If it's of any importance, the corvette is a '98 with about 63,000 miles. Oh, and it doesn't have active handling.
When I restarted the car, I didn't get any messages, and it idled fine, but the check engine light was on. So when I got home, I pulled the codes, and heres what came up:
10-PCM - p1516 H Command vs Actual Throttle Position Performance (TAC Module)
28-TCS - c1255 H EBTCM Internal Malfunction
c1278 H TCS Temporarily Inhibited By PCM
So what I'm thinking is that my EBCM(?) unit finally went out... Could someone please elaborate on what exactly these codes mean, before I take it in to Chevy, so I kind of know what I'm in for? That would be awesome.
If it's of any importance, the corvette is a '98 with about 63,000 miles. Oh, and it doesn't have active handling.
Course if it is still there then I would begin the next phase of troubleshooting.
Racer
Joined: Jul 2010
Posts: 262
Likes: 2
From: Shawnee Kansas
I would clear the codes and make sure your battery is fully charged. A low battery causes havok. Mine did this a couple of times while I was installing a new stereo system and thought I had big problems. It was a not fully charged battery.
Course if it is still there then I would begin the next phase of troubleshooting.
Course if it is still there then I would begin the next phase of troubleshooting.
Team Owner
Joined: May 2006
Posts: 21,473
Likes: 356
From: Palmdale, Ca----- 2009 Cyber Gray 4LT A6 F55 452 RWHP 422 RWTQ- RIP 1998 C5 734 RWHP & 585 RWTQ-----
I would clear the codes and make sure your battery is fully charged. A low battery causes havok. Mine did this a couple of times while I was installing a new stereo system and thought I had big problems. It was a not fully charged battery.
Course if it is still there then I would begin the next phase of troubleshooting.
Course if it is still there then I would begin the next phase of troubleshooting.
Definitely do this before anything else - I also have a 1998 and if you need help just let me know - I have done this with mine too!
Thanks,Matt
