What Does P1768 Mean?
The transmission control module has detected a fault with the driving mode selector input circuit (Performance/Normal/Winter mode switch). The TCM cannot determine which driving mode is selected.
Common Causes
35%
Failed mode selector switch or button assembly
30%
Open or short circuit in mode selector wiring harness
20%
Corroded or damaged mode selector switch connector
10%
TCM internal fault in mode input circuit
5%
Ground circuit fault for mode selector switch
Diagnostic Steps
1
Step 1: Use scan tool to monitor mode selector status while cycling through all available modes
2
Step 2: Locate mode selector switch and inspect connector for corrosion, damage, or loose pins
3
Step 3: Measure voltage at switch output while pressing each mode button (should show distinct voltage levels)
4
Step 4: Check continuity of signal wire between mode switch and TCM connector
5
Step 5: Test mode switch resistance or voltage output at switch connector according to manufacturer specifications
Estimated Repair Cost
$100 - $400
Parts + labor, varies by vehicle and location
The transmission control module has detected a fault with the driving mode selector input circuit (Performance/Normal/Winter mode switch). The TCM cannot determine which driving mode is selected.
The most common cause of P1768 (Performance / Normal / Winter Mode Input Malfunction) is: Failed mode selector switch or button assembly
Typical repair costs for P1768 range from $100 to $400, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Transmission will operate in default mode only. Vehicle remains safe to drive but driver may experience unexpected shift characteristics or loss of mode selection capability.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1768 to identify the root cause.
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Quick Info
Category
Powertrain
System
Automatic Transmission
Difficulty
Type
Manufacturer
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