Cause
Water ingress into module
Water inside a module's housing rather than at its connector. Corrosion on a circuit board produces symptoms that make no sense together, because tracks that were never related are bridged — and it is usually terminal for the module, so the value here is identifying it rather than fixing it.
Under-seat, footwell and scuttle positions are the usual casualties.
Typically a moderate job.
Some of these codes mean you should stop driving
2 of the 109 codes this can cause indicate a fault where continuing to drive risks damage or is unsafe. Which one you have matters more than the cause does — read the code's own page before deciding.
Codes this can cause (109)
Codes where this is a likely explanation first, rather than merely a possible one.
- P05F8 Reductant Heater Control Module Performance Likely for this code Moderate
- P0606 Engine Control Module Processor Likely for this code High
- U0138 Lost Communication With All Terrain Control Module Likely for this code Moderate
- U0141 Lost Communication With Body Control Module A Likely for this code High
- U0142 Lost Communication With Body Control Module B Likely for this code Moderate
- U0143 Lost Communication With Body Control Module C Likely for this code Moderate
- U0144 Lost Communication With Body Control Module D Likely for this code Moderate
- U0165 Lost Communication With HVAC Control Module — Rear Likely for this code Moderate
- U0168 Lost Communication With Vehicle Security Control Module Likely for this code Moderate
- U0169 Lost Communication With Sunroof Control Module Likely for this code Moderate
- U0183 Lost Communication With Lighting Control Module — Rear A Likely for this code High
- U0185 Lost Communication With Antenna Control Module Likely for this code Moderate
- U0186 Lost Communication With Audio Amplifier A Likely for this code Low
- U0187 Lost Communication With Digital Disc Player/Changer Module A Likely for this code Low
- U0188 Lost Communication With Digital Disc Player/Changer Module B Likely for this code Low
- U0189 Lost Communication With Digital Disc Player/Changer Module C Likely for this code Low
- U0190 Lost Communication With Digital Disc Player/Changer Module D Likely for this code Low
- U0199 Lost Communication With Door Control Module A Likely for this code Moderate
- U0206 Lost Communication With Folding Top Control Module Likely for this code Moderate
- U0207 Lost Communication With Moveable Roof Control Module A Likely for this code Low
- U0214 Lost Communication With Remote Function Actuation Module Likely for this code Moderate
- U0241 Lost Communication With Headlamp Control Module A Likely for this code High
- U0242 Lost Communication With Headlamp Control Module B Likely for this code High
- U0256 Lost Communication With Front Controls Interface Module A Likely for this code Low
- U0257 Lost Communication With Front Controls/Display Interface Module Likely for this code Low
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
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