What this code means
B1145 may indicate that the front passenger window position detect circuit is not reporting window position as expected.
What the vehicle may do
- The passenger window may operate normally during some checks.
- The concern may appear only when the front passenger window is opened or closed.
- The code may be intermittent if it does not return after clearing and operating the window.
Possible fault areas
- Possible front passenger power window switch logic issue.
- Possible window position detection circuit concern.
- Possible related door multiplex or control communication concern.
Diagnostic path
Opening context
On this Accord, B1145 points to a possible problem with the front passenger window position detect circuit. In plain terms, the system may not be seeing the passenger window position the way it expects to. The customer may notice the passenger window operates normally at times, or the concern may only show up when that window is opened and closed. Broadly, this can involve the passenger window switch logic, the position detection circuit, or related door multiplex control, so start by proving whether the code comes back under the same basic window operation.
Verify the fault
Start by clearing the DTCs with the HDS. Then use the front passenger power window switch to manually open and close the front passenger window. After that, check codes again with the HDS and look for B1145. If B1145 comes back, continue with the next check. If it does not come back, treat it as an intermittent failure; the system is OK at this time.
Check for related direction before resetting
If B1145 is still present, check DTCs again with the HDS. What matters now is whether related front passenger window switch faults are stored with it. If they are present, diagnose those related faults first instead of jumping straight into a reset. If they are not present, this diagnostic path moves to resetting the front passenger power window switch.
Repair verification
Keep verification separate from the testing path. Once the appropriate related-fault path or passenger window switch reset path has been handled, use the same confirmation check: clear the DTCs with the HDS, operate the front passenger window from the passenger switch, and check that B1145 stays gone. The takeaway is simple: prove the code returns, check whether related passenger window switch faults need attention first, then confirm the position detect fault does not come back. For more diagnostic training, visit stepdiagnostics.com.
Final check
For B1145, confirm whether the code resets during passenger window operation, check for related passenger window switch faults as context, then verify the code stays cleared after the appropriate path
For more guided automotive diagnostics, visit STEP Diagnostics.
