What this code means
B1145 may mean the system thinks the front passenger window is in a different position than the glass actually is.
What the vehicle may do
- The front passenger window may behave inconsistently during operation.
- Auto or position-related window behavior may feel incorrect or unreliable.
- The concern may be more noticeable after power loss, reset, or window control changes.
Possible fault areas
- Possible front passenger power window switch reset or initialization concern
- Possible passenger window position detect circuit concern
- Possible related power-window or door multiplex control context
Diagnostic path
Opening: what B1145 is looking at
On this 2016 to 2024 Honda Civic with the 1.5 turbo, B1145 is a front passenger window position detect circuit code. In plain language, the power window master switch may be seeing the passenger glass in one position while the actual glass position is somewhere else. The vehicle may show odd passenger-window behavior, especially around position tracking or manual window operation. Broadly, this can involve a possible switch reset or initialization concern, the passenger window position detect circuit, or related power-window and door multiplex control context. Think of this as a plausibility check: what the system believes versus where the window actually is.
Start with the code context
Before getting into the B1145 path, start with the basic system checks and keep the diagnostic approach structured. If the car has multiple codes, do not treat B1145 in isolation. Use the B-CAN multiple-code diagnostic approach, check what the other codes mean first, and handle any related power-window or door-multiplex faults before continuing with this passenger window position code.
Reset the passenger window switch
Once the earlier code context is handled, the next step for B1145 is to reset the front passenger's power window switch. Keep this focused on the passenger switch inspection item; this path does not support jumping straight to a parts call.
Run the passenger window manually
After the reset, turn the vehicle to the ON mode. Then use the front passenger's power window switch to manually open and close the front passenger window. That manual open-and-close operation is the operating check for this diagnostic path.
Closeout
The takeaway: treat B1145 as a passenger-window position plausibility problem. Handle related code context first, reset the front passenger switch, and then run the passenger window manually from that switch to check the path in order. For more diagnostic training, visit stepdiagnostics.com.
Final check
B1145 is best approached as a command-versus-actual window position plausibility issue: check related code context first, then follow the passenger switch reset and manual window operation path.
For more guided automotive diagnostics, visit STEP Diagnostics.
