What Does P0827 Mean?
The up and down shift switch circuit is reading low voltage. This typically indicates a short to ground in the shift switch wiring, a stuck switch contact, or a failed switch that is permanently grounded. The TCM may interpret this as a continuous shift command or disable manual shift mode entirely.
Common Causes
30%
Shift switch stuck closed or internally shorted
30%
Wiring short to ground in the shift switch circuit
20%
Corroded connector causing low-resistance path to ground
10%
Failed clock spring with internal short
10%
TCM internal pull-down circuit issue
Diagnostic Steps
1
Monitor shift switch circuit voltage in live data — it should read high when no button is pressed and go low only when a switch is actuated.
2
Disconnect the shift switch connector and recheck circuit voltage at the TCM to determine if the short is in the switch or the wiring.
3
If disconnecting the switch resolves the low voltage, test the switch for internal short with an ohmmeter.
4
If the low voltage persists with the switch disconnected, inspect the wiring for shorts to ground, especially where the harness routes through the steering column.
5
Check the clock spring for internal shorts if paddle shifters are routed through it.
Estimated Repair Cost
$75 - $450
Parts + labor, varies by vehicle and location
The up and down shift switch circuit is reading low voltage. This typically indicates a short to ground in the shift switch wiring, a stuck switch contact, or a failed switch that is permanently grounded. The TCM may interpret this as a continuous shift command or disable manual shift mode entirely.
The most common cause of P0827 (Up and Down Shift Switch Circuit Low) is: Shift switch stuck closed or internally shorted
Typical repair costs for P0827 range from $75 to $450, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Manual shift mode may be disabled or behave erratically. Automatic shifting should still function normally. The vehicle is safe to drive in automatic mode. 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 P0827 to identify the root cause.
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Quick Info
Category
Powertrain
System
Transmission Control System
Difficulty
Type
Generic (SAE)
Recommended Tools
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