B1041 on Lincoln: How to Diagnose & Fix
Oil Level/Temperature Sensor Circuit Fault
1 Lincoln model · 1 documented issue
B1041 on Lincoln by model: symptoms, diagnosis and fix
Some 2020-2023 Aviators equipped with air suspension may display a Drive Malfunction and/or Suspension Fault message with DTCs B1041 and U2100 stored in Suspension Control Module A (SUMA). Ford SSM 51621 says this bulletin-defined condition can occur when SUMA enters diagnostic service mode after an on-demand self-test following suspension diagnosis or repair. It does not identify a leaking air spring, compressor, height sensor, or solenoid as the cause of these two codes.
Common Symptoms
- Drive Malfunction message
- Suspension Fault message
- DTC B1041 stored in SUMA
- DTC U2100 stored in SUMA
How to Fix
Use Ford Diagnosis and Repair System (FDRS) and select SUMA > Run All CM (Continuous Memory) DTCs. Do not run SUMA > OD and CM DTCs for this condition because the on-demand self-test can create the invalid codes. If that test was run, clear the condition with SUMA > Transport and Factory Mode Deactivation. If other DTCs or physical ride-height symptoms remain, follow Workshop Manual Section 204-05 normal diagnostics before selecting a part. This record intentionally has no commerce link.
Owner tips & cautions
- WarningDo not replace a compressor, air spring, sensor, or solenoid from B1041/U2100 alone; SSM 51621 first corrects a diagnostic service-mode state.
- TipAsk whether an on-demand SUMA self-test was run immediately before the warning appeared and retain the complete FDRS fault report for any remaining diagnosis.
Sources for this issue (1)
B1041 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does B1041 mean on a Lincoln?
B1041 stands for "Oil Level/Temperature Sensor Circuit Fault." B1041 is a manufacturer-specific body-network code that, on most vehicles that use it (notably some Mercedes-Benz and GM applications), points to a fault in the engine oil level/temperature ('thermal oil') sensor circuit or its wiring. The control module monitors this sensor and has detected a signal that is out of range, open, or shorted. It generally does not affect drivability but means the oil-level/condition reading reported to the dash may be unreliable. Because the exact meaning varies by maker, confirm against your vehicle's service data. On Lincoln it is documented across 1 model: Aviator.
What are the most common causes of B1041?
The most common causes of B1041 are: Faulty oil level/temperature (thermal) sensor, Damaged or chafed sensor wiring (often near a harness bracket), Corroded or loose sensor connector, Low or contaminated oil affecting the sensor reading, Open or short in the sensor signal/ground circuit, Faulty control module receiving the sensor input. The specific cause varies by vehicle.
How much does it cost to fix B1041 on a Lincoln?
Repair costs vary widely with the root cause and Lincoln model; each issue on this page carries its own estimate where one is published.
Looking for B1041 on a different make?
View B1041 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.