TCM Power Input Signal
The P0880 code means the vehicle's onboard diagnostic system has detected: TCM Power Input Signal. This is a critical severity code.
- Keep driving?
- No — stop driving
- DIY difficulty
- hard
- Estimated cost
- $50 - $1,500 (parts and labor)
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What Are the Symptoms of P0880?
- Check Engine Light illuminated
- Transmission completely non-functional
- Vehicle stuck in one gear or neutral
- No communication with TCM on scan tool
What Causes P0880? (Most Likely First)
- Blown TCM power supply fuse Very High
- Faulty TCM power relay High
- Wiring fault in TCM power supply circuit Moderate
- TCM internal power circuit failure Low
Can I Still Drive with P0880?
No — stop driving. P0880 is rated critical severity. Continuing to drive in this state risks further damage — get it looked at before your next trip.
Frequently Asked Questions
Can a blown fuse cause P0880?
Yes, a blown fuse is the most common and least expensive cause of P0880. Check the TCM fuses first before pursuing more complex diagnostics.
Why did the TCM fuse blow?
A blown fuse can be caused by a short circuit in the TCM wiring, a faulty relay, or water intrusion at the TCM connector. Finding the root cause prevents the fuse from blowing again.
Will replacing the fuse fix the problem?
If the fuse blew due to a momentary spike, replacing it may resolve the issue. If it blows again immediately, there is an underlying short circuit that must be found and repaired.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose P0880?
-
Check all TCM-related fuses in the underhood and interior fuse boxes
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Test the TCM power relay for proper operation
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Measure voltage at the TCM power supply pins with key on
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Inspect the TCM connector and wiring for damage or corrosion
Sources 2
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
- Cross-checked against the SAE J2012:2002 DTC table (2026-08-27)archived scan of the SAE standard — readable copy, not SAE’s current edition
Which Vehicles Commonly Get P0880?
- 2007-2017 Dodge Ram 1500
- 2008-2018 Chrysler 300
- 2010-2020 Jeep Grand Cherokee
- 2009-2019 Ford F-150
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