Reduced Power and Check Engine Light on Hummer H2
Problem overview
The Hummer H2 uses a throttle position sensor (TPS) which commonly fails and causes the following issues:
- Check engine light illumination
- Reduced Power message
- OBD trouble code P2135
This issue is related to the throttle position sensor, and can be caused by faulty wiring to the TPS, bad connection at the TPS, or a failed TPS.
To correct this issue, the wiring harness, connector, and throttle position sensor must be inspected, tested, and/or replaced. The most common cause is a faulty TPS.
7 people reported this problem
1 commentHummer H2 vehicles with this problem
3 model years affected
Average mileage: 134,000 miles
(134,000 - 134,000)
Search for another problem
RepairPal ™Car Genius
Ask our experts about your Hummer.
RepairPal Car Genius™ is a free resource for vehicle owners seeking advice on maintenance, auto repair, shop inquiries, estimates, and finding a trustworthy repair shop in your area.
Call us at 877-913-1554
Available 9am – 6pm ET Monday through Friday
