Lost Communication With Multi-Function Switch (Chrysler/Dodge/Jeep). NOTE: Nissan Around-View Monitor codes are in the U13xx range, not here.
The U1149 code means the vehicle's onboard diagnostic system has detected: Lost Communication With Multi-Function Switch (Chrysler/Dodge/Jeep). NOTE: Nissan Around-View Monitor codes are in the U13xx range, not here.. This is a low severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- hard
- Estimated cost
- Varies — depends on the specific component this manufacturer-specific code points to on your vehicle. Diagnose before buying parts.
Manufacturer-specific code. U1149 is a manufacturer-specific DTC, so its exact definition can differ by make, model, and year. Use the meaning above as a general guide, and always confirm it against your vehicle manufacturer's official service information (or a make-specific scan tool) before diagnosing or replacing parts.
Network codes mean modules are not communicating. You need a scanner that reads all systems to find the problem.
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Common Symptoms
- Check Engine or a related warning light on
- Exact symptoms depend on the specific system this code covers for your make
- A make-specific scan reveals which subsystem and circuit is involved
Probable Causes (Ranked by Likelihood)
- A fault in the specific component or circuit this code monitors (the exact part varies by manufacturer) High
- Damaged wiring, a corroded connector, or a poor ground in that circuit Moderate
- A related sensor or control module reporting or causing the fault Moderate
Step-by-Step Diagnostic Procedure
-
Confirm your exact make, model, and year first — U1149 is manufacturer-specific and can mean different things across brands.
-
Read U1149 with an enhanced/make-specific scan tool and check your manufacturer's official service information for the precise definition and procedure.
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Inspect the wiring, connectors, and grounds for the indicated circuit before replacing any part.
Common Fixes by Vehicle
What techs usually find when diagnosing U1149 on specific vehicles — tap your vehicle for the fix and the exact part:
2003-2013 Ford F-150/Expedition Advanced DIY
U1149 lost comm with BCM on older Ford trucks is almost always water damage at the GEM (Generic Electronic Module) in the left kick panel. Open the kick panel and inspect for rust on the module board -- blocked cowl drains flood this area. Clean drains, replace GEM with a junkyard unit, reprogram with Forscan.
Labor: 2-3 hours2005-2014 Chrysler/Dodge (TIPM vehicles) Advanced DIY
Chrysler U1149 typically points to the TIPM losing bus communication. Check fuses M1, M25 in the TIPM first, then test CAN resistance at the DLC. TIPMs are a known weak point (TSB 08-065-12). A refurbished TIPM with reprogramming is often the solution at $400-600.
Labor: 2-3 hours2006-2015 Chevrolet/GMC trucks Advanced DIY
GM trucks set U1149 when the BCM loses communication on the Class 2 serial bus. Check ground G200 at the engine block and G102 at the left headlight. Corrosion at BCM connector C1 is another common cause. If BCM is genuinely failed, Tech2 programming with SPS is required -- usually a dealer job.
Labor: 2-3 hoursFrequently Asked Questions
Does U1149 mean the same thing on every vehicle?
No. U1149 is a manufacturer-specific diagnostic trouble code, so its exact meaning varies by make, model, and year. Always confirm it against your vehicle manufacturer's service information before diagnosing or replacing parts.
What does U1149 most likely indicate?
Lost Communication With Multi-Function Switch (Chrysler/Dodge/Jeep). NOTE: Nissan Around-View Monitor codes are in the U13xx range, not here.. Treat this as a general guide and verify the specifics for your vehicle.
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