Fault codes U0400–U0499
U04xx codes mainly cover: module communication. Our list has 49 codes in this range. With most of them you can drive gently, but get the car checked soon. Repairs cost roughly €60–800, depending on the fault. The most common are U0402, U0403, U0404. Based on AI combined with our hands-on workshop experience and knowledge.
Most common in this range
U0402Invalid data from the gearbox control module (TCM)U0403Invalid data from the transfer case moduleU0404Invalid data from the gear selector moduleU0405Invalid data from the cruise control moduleU0406Invalid data from the injector control moduleU0407Invalid data from the glow plug control moduleU0408Invalid data from the throttle actuator moduleU0410Invalid data from the fuel pump control module
All codes in this range
U0402Invalid data from the gearbox control module (TCM)U0403Invalid data from the transfer case moduleU0404Invalid data from the gear selector moduleU0405Invalid data from the cruise control moduleU0406Invalid data from the injector control moduleU0407Invalid data from the glow plug control moduleU0408Invalid data from the throttle actuator moduleU0410Invalid data from the fuel pump control moduleU0411Invalid data from the drive motor moduleU0412Invalid data from the battery management module AU0413Invalid data from the battery management module BU0414Invalid data from the 4WD clutch moduleU0415Invalid data from the ABS control moduleU0416Invalid data from the stability control (ESP) moduleU0417Invalid data from the electric parking brake moduleU0418Invalid data from the brake system control moduleU0420Invalid data from the power steering moduleU0421Invalid data from the ride height moduleU0422Invalid data from the body control module (BCM)U0423Invalid data from the instrument clusterU0424Invalid data from the climate control moduleU0425Invalid data from the auxiliary heater moduleU0426Invalid data from the immobiliserU0427Invalid data from the security moduleU0428Invalid data from the steering angle sensorU0429Invalid data from the steering column moduleU0430Invalid data from the tyre pressure moduleU0431Invalid data from the body control module (BCM) AU0432Invalid data from the acceleration sensor (ESP)U0437Invalid data from the rear differential moduleU0442Invalid data from the engine control module (ECM) BU0443Invalid data from the body control module (BCM) BU0444Invalid data from the body control module (BCM) CU0445Invalid data from the body control module (BCM) DU0447Invalid data from the gateway module AU0448Invalid data from the gateway module BU0449Invalid data from the gateway module CU0452Invalid data from the airbag control moduleU0455Invalid data from the passenger occupant sensor moduleU0456Invalid data from the coolant temperature moduleU0457Invalid data from the driver information centre AU0458Invalid data from the driver information centre BU0464Invalid data from the navigation moduleU0467Invalid data from the fuel additive (DPF) moduleU0469Invalid data from the starter-generator moduleU0480Invalid data from the seatbelt pretensioner module BU0482Invalid data from the headlamp levelling moduleU0485Invalid data from the radioU0499Invalid data from the telematics module
Want a definite answer?
Bring the car to our workshop in Estonia for diagnostics. We read the fault codes, test the sensors and tell you what is wrong. Repair price depends on the work involved, generally €45 per hour.