What Does P0828 Mean?
The up and down shift switch circuit is reading high voltage. This condition points to an open circuit, a break in the ground path, or a wiring fault that keeps the signal pulled high. The TCM cannot detect manual shift commands and will disable the manual shift mode or paddle shifter functionality.
Common Causes
30%
Open circuit in shift switch wiring — broken conductor or disconnected connector
30%
Faulty shift switch that does not close the circuit when pressed
20%
Corroded or spread connector terminals causing open contact
10%
Broken clock spring interrupting the signal path
10%
TCM internal pull-up or input circuit failure
Diagnostic Steps
1
Monitor the shift switch circuit voltage in live data while pressing the shift switches — the voltage should drop when a switch is actuated.
2
Check for voltage at the shift switch connector and verify ground continuity with a multimeter.
3
Inspect the connector for spread or corroded terminals that would prevent good contact.
4
If paddle shifters are used, test clock spring continuity through the affected circuits.
5
Test each switch with an ohmmeter for proper open/closed behavior when pressed.
Estimated Repair Cost
$75 - $450
Parts + labor, varies by vehicle and location
The up and down shift switch circuit is reading high voltage. This condition points to an open circuit, a break in the ground path, or a wiring fault that keeps the signal pulled high. The TCM cannot detect manual shift commands and will disable the manual shift mode or paddle shifter functionality.
The most common cause of P0828 (Up and Down Shift Switch Circuit High) is: Open circuit in shift switch wiring — broken conductor or disconnected connector
Typical repair costs for P0828 range from $75 to $450, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Manual/paddle shift mode will not function, but automatic shifting remains operational. Driving is completely safe in automatic mode. Schedule repair at your convenience.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0828 to identify the root cause.
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Quick Info
Category
Powertrain
System
Transmission Control System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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