SPONSORED LINKS

ECM Codes P0178 and P2119?

Tiny
TDCHRYSLER
  • MEMBER
  • 2014 BUICK LA CROSSE
  • 3.6L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 129,000 MILES
I noticed a few times while driving when I would hit the brakes, my RPMs would drop to 0 and car would go in a 'stall" meaning the ignition is still on and in drive, but I would then have to shift into park, turn off the vehicle and start again. I would also notice a rough idle at times with the RPM when I would first start the car, when parked and driving.

I also began to notice when I would go to the gas station for fuel, when I would open the tank cover before turning off, it has a rough idle/drag to turn off. Once I'm done getting the fuel and go to start it would be a drag/rough start. I have even noticed a change in my fuel efficiency and performance.

I had my car scanned and received the codes 'P0178-00 Fuel Composition Sensor Circuit Low Frequency' & 'P2119-00 Throttle Closed Position Performance'. The throttle body was cleaned, so the stalling has stopped but still getting the codes and also having the other symptoms. Do these have to be replaced?
SPONSORED LINKS
Saturday, November 16th, 2024 AT 3:19 PM

9 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
Once the P2119 code has shown up I would replace the throttle body, cleaning it helps but there is an electrical error. I would replace the throttle body and then clear the codes, and the fuel consumption sensor problem might go away, if not be start a new thread for the P0178 code.

P2119 - Throttle Actuator Control (TAC) Throttle Body Range/Performance

P0178 - Fuel Composition Sensor Circuit Low Input

Here is the correct way to replace the throttle body. Clear the codes once completed. Check out the images (below). Please let us know what happens.
Images (Click to make bigger)
Thumb
Thumb
Thumb
Thumb
Thumb
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Monday, November 18th, 2024 AT 11:10 AM
Tiny
TDCHRYSLER
  • MEMBER
  • 27 POSTS
Okay, thank you I will replace the throttle body and clear codes and get back to you once it's completed. Just for clarification, if the fuel composition sensor code still shows, what were you meaning by 'be start a new thread for the P0178 code.'
Was this
answer
helpful?
Yes
No
Wednesday, November 20th, 2024 AT 11:42 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
Yes, if you replace the throttle body but the P0178 code is still there without the P2119 code please start a new thread because these will be separate problems.
Was this
answer
helpful?
Yes
No
Thursday, November 21st, 2024 AT 10:26 AM
Tiny
TDCHRYSLER
  • MEMBER
  • 27 POSTS
Okay, thanks again.
Was this
answer
helpful?
Yes
No
Friday, November 22nd, 2024 AT 5:51 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
Have a good weekend!
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Friday, November 22nd, 2024 AT 12:34 PM
Tiny
TDCHRYSLER
  • MEMBER
  • 27 POSTS
I replaced the throttle body and no more P2119 code appeared. But I'm still getting the P0178 code - Fuel Composition Sensor Circuit Low Frequency. What do you recommend moving forward to resolve this?
Was this
answer
helpful?
Yes
No
Monday, December 9th, 2024 AT 6:36 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
Did you clear the cods and drive it? If so lets start a new thread for the P0178 code.
Was this
answer
helpful?
Yes
No
Tuesday, December 10th, 2024 AT 10:09 AM
Tiny
TDCHRYSLER
  • MEMBER
  • 27 POSTS
Yes, the codes were cleared and drove it. The engine light came back on with P0178 code. Okay, will start a new thread.
Was this
answer
helpful?
Yes
No
Wednesday, December 11th, 2024 AT 6:21 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
Sounds good.
Was this
answer
helpful?
Yes
No
Wednesday, December 11th, 2024 AT 10:27 AM

Please login or register to post a reply.

Sponsored links