U1213Krytyczny
BSI — brak komunikacji z modułem silnika (PSA)
Komunikacja sieciowa
Sprawdź szczegóły →U1230
NiskiSCP (J1850) – incorrect or missing data for the rear window defroster electrical system
OBD-II (EN): SCP (J1850) – invalid or missing data for rear window defogger circuit
Code U1230 indicates a communication problem on the SCP (J1850) network, concerning data transmission for the rear window defroster electrical system. In Ford, Mazda, Volvo, and other vehicles, this can manifest as a non-functioning rear window heater and an illuminated engine light. Although the code does not directly affect safety, it should not be ignored – it is a signal of problems in the vehicle's communication network.
Symptoms
Illumination of the Check Engine light or network warning light. Malfunction of the rear window heating (defroster does not work). Possible communication problems with other modules on the SCP network.
Possible causes
Damage to the SCP (J1850) network wiring harness Corrosion or break in the connections of the electrical defroster circuit Damage to the rear window defroster control module (defrost module) Failure of the body control module (BCM) or another module communicating via SCP Electromagnetic interference or short circuit on the network
Affected systems
System elektrycznego odmrażania tylnej szybySieć komunikacyjna SCP (J1850)Moduł sterowania nadwoziem (BCM)
Related codes
Code U1230 appears in these brands
Go to messages and symptoms for your brand — there we analyze this code together with other typical alerts.
Does code U1230 require professional diagnostics?
The code alone is not enough. To find the cause, you need to read live data, check freeze frame conditions, and compare with vehicle behavior. Book a diagnostic session.