B1041 on 2020-2023 Lincoln Aviator — Oil Level/Temperature Sensor Circuit Fault
1 vehicles · 1 makes
How to diagnose and fix B1041: most-reported vehicles
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Lincoln Aviator · 2020–2023
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)
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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?
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.
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?
Repair costs vary widely depending on the root cause and vehicle.
Which vehicles are affected by B1041?
Au7o has documented B1041 across 1 vehicle models from 1 manufacturers: Lincoln.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.