Codes P1516, P2102, P2119 and P2135?

Tiny
GOTTAKEEPMOVIN'
  • MEMBER
  • 2008 CHEVROLET COBALT
  • 2.4L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 220,000 MILES
The car drove fine last time I started it (2 weeks ago). Today, I started the car remotely. It started for a second, then shut off, and then wouldn't restart. I seem to have P1516, P2102, P2119 and P2135 codes persistently. I charged battery and it seems to be fine, but the starter would not engage. Got an "Engine Power Reduced" and an "Engine Disabled" warning on the obd. I inspected and cleaned the throttle body and there doesn't appear to be any issues there. I reset ECM by shorting car's positive and negative terminals together for 15-20 minutes. Starter then worked when attempting to restart but the car did not fire. The issue must have immediately logged another code because the starter would not engage a second time. All codes returned and my diagnostic tool doesn't seem to successfully delete them, even though it states it does. Presently resetting ECM again with no idea where to go from here. Thanks!

Update: Car now starts but runs very roughly. Engine in reduced power mode. Still some kind of issue, whether it's a relearning issue or not, I'm not sure. Only codes now are P2119 and P2135!
Thursday, August 31st, 2023 AT 1:36 PM

4 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Hi,

The codes are related to the throttle position actuators. When the P2135 is set, a message indicator should indicate, Reduced Engine Power.

Check the connectors at the throttle body. Make sure nothing is damaged or shorted, and make sure the connector pins are in good condition and not corroded.

I attached the diagnostics below for the P2135. This is where I would start simply because it deals with an open circuit, and the other code shows a variation in voltages between throttle position sensors 1 and 2.

Take a look through the diagnostics (which also includes48
a description) and let me know if you are comfortable performing them.

Take care,

Joe

See pics below.
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Thursday, August 31st, 2023 AT 8:24 PM
Tiny
GOTTAKEEPMOVIN'
  • MEMBER
  • 41 POSTS
Thanks for the assistance, Joe! Where would I find pinout info for the TP sensor connectors, so I know which one has the variable voltage? Also, are both TP sensors actually on the throttle body? Are they numbered somehow? Thanks!
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Friday, September 1st, 2023 AT 9:24 AM
Tiny
GOTTAKEEPMOVIN'
  • MEMBER
  • 41 POSTS
Problem solved, Joe! I found that the TPS connector is so close to the plastic cover that attaches between the air filter intake and the throttle body itself, that the green (?) Wire was clearly damaged. Using some solder skills, I was able to install a jumper. Removed the throttle body and thoroughly cleaned as well. Put the car back together and it started right up. Cleared codes (and they all cleared), and away we go. Thanks so much, Joe, for your time and effort here! Kevin
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Friday, September 1st, 2023 AT 12:10 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Hi,

Thanks for the update. I'm glad you found the issue and were able to repair the issue.

Take care of yourself and feel free to come back anytime in the future.

Joe
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Friday, September 1st, 2023 AT 10:34 PM

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