P0810: How to Diagnose & Fix — Clutch Position Control Error

Souls with the 1.6L Turbo-GDI and 7-speed dry dual-clutch transmission exhibit low-speed clutch judder (a body shake accelerating from a stop, worst on cold/humid mornings), harsh engagement, and hesitation. The dry clutches glaze/wear during stop-and-go creeping. Kia's diagnosis is a creep-driving test: if the body vibrates without steering-wheel shudder, it is clutch judder. TSB TRA083 (Souls built 8/8/2016-10/27/2016 and 11/24/2018-4/2/2020) remedies confirmed judder by replacing the dual-clutch assembly and upgrading the TCU.

Clio IV models with the six-speed EDC automatic (the dry-clutch Getrag DCT250, the same family as the troubled DSG/PowerShift units) suffer low-speed judder, jerky 1st-2nd shifts, clunks engaging Drive or Reverse, overheating warnings in traffic, and 'Check auto gearbox' messages. Causes range from TCU (transmission control unit) software and module faults — which Renault addressed on some cars — to worn dry-clutch friction surfaces and slow actuators. One documented Clio RS 200 EDC failure drew a quote of about $4,500 for the clutch pack alone.

This failure belongs to European-market Yaris fitted with Toyota's MMT (Multimode) automated manual transmission - an electrically operated robotised manual transmission with electric actuators for clutch and gear selection. It does not exist on the US-market four-speed automatic or on any Mazda-built Yaris. The clutch actuator can fail and lose the ability to hold or report clutch position. The gearbox then refuses to select a gear and the N on the gear position display flashes. Most owners hit it stationary, moments after switching on - the car simply will not take drive - but it also happens on the move, where the box drops out of the engaged gear and back into neutral, which is a loss of drive in traffic. UK actuator remanufacturers describe it as a frequent failure on MMT-equipped Yaris and commonly see fault codes such as P0810.

The 1.6L Gamma T-GDI Forte (2019 Forte5 SX turbo and the Forte GT) uses the D7UF1 seven-speed dry dual-clutch transmission rather than the IVT used on 2.0L cars. The dry clutch friction material glazes and the clutch actuator adaptation drifts, producing a body-shaking judder when creeping away from a stop or in slow traffic - the car vibrates but the steering wheel does not, which is the diagnostic that distinguishes clutch judder from a wheel/tire imbalance. As it progresses owners report a loud thud/jerk on the 1-2 engagement and, under wide-open throttle around 30-40 mph, a downshift where revs flare without corresponding acceleration (clutch slip). Kia TSB TRA083 covers 7-speed DCT vehicles from the 2016-2020 model years, which includes the 2019-2020 Forte.