Reduce engine power

2003 CHEVROLET SILVERADO
220,000 MILES • 6.0L • V8 • 4WD • AUTOMATIC
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STERLINGJ
  • MEMBER
  • 2 POSTS
Reduce engine power come on it won't go over 20MPH. Replaced throttle body sensor as well as ECM, checked all wires. nothing is loose. I don't know what else to do.
Apr 6, 2022 at 10:44 AM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,240 POSTS
Are there any diagnostic trouble codes present? A reduced power indication can be caused by a few different things. That's why I recommended scanning. For example, an engine temperature sensor, brake-related issue, and so on can set it. Let me know if there are codes so we know what direction to proceed.

Let me know.

Joe
Apr 7, 2022 at 7:03 AM
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STERLINGJ
  • MEMBER
  • 2 POSTS
P1518, I do believe.
Apr 7, 2022 at 7:12 AM
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