B3A1B · 厂商技术资料

FORD, LINCOLN · 2026-04-24

Some 2024-2026 Explorer/Aviator/Police Interceptor Utility vehicles may exhibit an illuminated malfunction indicator (MIL) lamp with engine over-temperature warning in the message center and poor air conditioning (A/C) performance from the engine cooling fan not running. Diagnostic trouble codes (DTC) B3A1B, P0113, P0217, and/or P0480 may be stored in the powertrain control module (PCM). This may be due to poor engine compartment ground connections at G105, G107, G111 and/or G122. Refer to the Wiring Diagram (WD) > Grounds Cell 010 > Pages 2, 3, 7 and 8. Prior to any Workshop Manual (WSM) diagnostics, verify all listed grounds are tightened to 62 lb-in (7 Nm) to resolve this condition. If symptoms or DTCs return after all grounds are tightened, follow normal WSM diagnostics.

FORD · 2023-10-23

Some 2024 Mustang vehicles may exhibit an inoperative air conditioning (a/c) system. Diagnostic trouble codes (DTCs) B3A1B and/or P0534 may be set within the powertrain control module (PCM). This condition is currently under investigation by engineering. For vehicles that meet this criteria, submit a Report a Vehicle Concern (if no help is needed) or a submit a Technical Support Request (if help is needed). In the report, include as much information as possible about the vehicle symptom including high and low side a/c system pressures, a/c pressure transducer PID readings, the amount of refrigerant that was recovered from the vehicle (only if refrigerant recovery was required), and anything else found during the diagnosis that would be helpful to the investigation. Attach screen shots,…