Un colpo d'occhio sugli errori più comuni nelle TCU

Le trasmissioni automatiche sono diventate negli ultimi anni, per diverse ragioni, molto popolari. I vantaggi per l'automobilista sono noti e facilitano molto la guida. La scelta della giusta marcia viene delegata in questo caso a una centralina, chiamta anche TCU (Transmission Control Unit). Cosa succede quando il cervello della gestione cambio smette di funzionare? Oltre alle anomalie di funzionamento, solitamente si riscontrano anche codici di errore che indicano chiaramente un problema nella TCU. Qui di seguito un riepilogo!

Audi

Codice di errore	Riparabile
P0706 / 17090 / 001798 - Transmission Range Sensor (F125): Implausible Signal	Multitronic / Hytronic V30 Multitronic / Hytronic VL300
P0722 / 17106 - Output Speed Sensor No Signal	Multitronic / Hytronic V30 Multitronic / Hytronic VL300
P0730 - Incorrect Gear Ratio	Multitronic / Hytronic V30 Multitronic / Hytronic VL300

Ford

Codice di errore	Riparabile
P0810 - Clutch position control error	Durashift (Ford & Mazda)
P0919 - Gearshift position control error	Durashift (Ford & Mazda)

Honda

Codice di errore	Riparabile
P0810 - Clutch Position Control Error / Clutch position fault	I-Shift Honda clutch actuator

Mazda

Codice di errore	Riparabile
P0810 - Clutch position control error	Durashift (Ford & Mazda)
P0919 - Gearshift position control error	Durashift (Ford & Mazda)

Mercedes-Benz

Codice di errore	Riparabile
P0657 - The voltage supply of the control unit solenoid valves in the CVT is faulty	Mercedes Benz Temic VGS (722.8) CVT / FCVT
P0700 – General System Error	Mercedes Benz Clutch control Module (AKS)
P0705 - Transmission range sensor circuit malfunction / Component Y3/8s1 selection range sensor is defective	Mercedes Benz Temic VGS (722.8) CVT / FCVT Continental 7G-tronic (722.9) First, Second and Third Generation
P0717 - The RPM signal from component Y3/9b3 (CVT input RPM sensor) is not available / The signal from component (sensor) Y3/8n1 is not available	Mercedes Benz Temic VGS (722.8) CVT / FCVT Continental 7G-tronic (722.9) First, Second and Third Generation
P0718 - Component (sensor) Y3/8n1 is defective	Continental 7G-tronic (722.9) First, Second and Third Generation
P0720 - Output speed sensor malfunction	Mercedes Benz Temic VGS (722.8) CVT / FCVT Continental 7G-tronic (722.9) First, Second and Third Generation
P0721 - The transmission output speed signal is implausible, when compared to the wheel RPM signal	Continental 7G-tronic (722.9) First, Second and Third Generation
P0722 - The RPM signal from component Y3/9b5 (CVT output rpm sensor) is not available / Output speed sensor no signal	Mercedes Benz Temic VGS (722.8) CVT / FCVT Continental 7G-tronic (722.9) First, Second and Third Generation
P0723 - Output speed sensor is defective	Continental 7G-tronic (722.9) First, Second and Third Generation
P0739 - Secondary RPM signal of component Y3/9b5 is not available	Mercedes Benz Temic VGS (722.8) CVT / FCVT
P0741 - Actuation of torque converter clutch not possible	Mercedes Benz Temic VGS (722.8) CVT / FCVT
P0793 - Intermediate shaft speed sensor circuit Y3/9b4 no signal	Mercedes Benz Temic VGS (722.8) CVT / FCVT
P0842 - The output voltage of component pressure sensor is faulty (short circuit to ground)	Mercedes Benz Temic VGS (722.8) CVT / FCVT
P0843 - The output voltage of component pressure sensor is faulty (short circuit to positive)	Mercedes Benz Temic VGS (722.8) CVT / FCVT
P0896 - Impermissible adjustment of the step-down ratio in the CVT	Mercedes Benz Temic VGS (722.8) CVT / FCVT
P1634 - Component Y3/9n1 (CVT) is defective or the voltage supply is faulty (undervoltage)	Mercedes Benz Temic VGS (722.8) CVT / FCVT
P1709 - Park/Neutral switch	Automatic gear selector GRM (Mercedes A-class W168 / Vaneo W414 )
P1784 – Clutch Defective	Mercedes Benz Clutch control Module (AKS)
P1840 (2120) - PWM solenoid valve 1/4 shift	Mercedes Benz Siemens FTC (722.7)
P1841 (2121) - PWM solenoid valve 3 shift	Mercedes Benz Siemens FTC (722.7)
P1842 (2122) - PWM solenoid valve 2 / 5 / R shift	Mercedes Benz Siemens FTC (722.7)
P1843 - PWM solenoid valve torque convertor lockup clutch	Mercedes Benz Siemens FTC (722.7)
P1844 - PWM shift valve circuit	Mercedes Benz Siemens FTC (722.7)
P1850 (2204) - Transmission RPM sensor Y3/7n1	Mercedes Benz Siemens FTC (722.7)
P1856 - Selector lever implausible	Automatic gear selector GRM (Mercedes A-class W168 / Vaneo W414 )
P1858 (2227) - Starter lockout contact	Mercedes Benz Siemens FTC (722.7)
P1872 - CAN signal from gear recognition module faulty	Automatic gear selector GRM (Mercedes A-class W168 / Vaneo W414 )
P1875 - CAN communication ESP	Automatic gear selector GRM (Mercedes A-class W168 / Vaneo W414 )
P1884 (2123) - PWM shift valve pressure	Mercedes Benz Siemens FTC (722.7)
P1897 - Control module N15/7 faulty	Mercedes Benz Siemens FTC (722.7)
P1903 - Control module N15/7 faulty	Mercedes Benz Siemens FTC (722.7)
P2200 - The signal from component (sensor) Y3/8n2 is not available	Continental 7G-tronic (722.9) First, Second and Third Generation
P2201 - Component (sensor) Y3/8n2 is defective	Continental 7G-tronic (722.9) First, Second and Third Generation
P240C - The CAN signal for the selector lever position from component N15/5 (electronic selector lever module control module) is implausible	Automatic gear selector GRM (Mercedes A-class W168 / Vaneo W414 )
P2550 - Component (sensor) Y3/8n3 is defective	Continental 7G-tronic (722.9) First, Second and Third Generation
P2722 - Impermissible closing of hydraulic clutch	Mercedes Benz Temic VGS (722.8) CVT / FCVT
P2731 - Impermissible closing of hydraulic clutch	Mercedes Benz Temic VGS (722.8) CVT / FCVT
P2767 - The signal from component (sensor) Y3/8n2 is not available	Continental 7G-tronic (722.9) First, Second and Third Generation
P2768 - Component (sensor) Y3/8n2 is defective	Continental 7G-tronic (722.9) First, Second and Third Generation

Opel

Codice di errore	Riparabile
P1607 - Position control error coupling actuator	Easytronic (F13 MTA/F17+MTA)
P1609 - Position sensor clutch actuator	Easytronic (F13 MTA/F17+MTA)
P1700 - Gearbox steering system operating problem	Easytronic (F13 MTA/F17+MTA)
P1723 - Selector lever data via unused cable	Easytronic (F13 MTA/F17+MTA)
P1728 - Switch motor mechanical failure	Easytronic (F13 MTA/F17+MTA)
P1729 - Switch motor electrical failure	Easytronic (F13 MTA/F17+MTA)
P1730 - Fault control gearbox	Easytronic (F13 MTA/F17+MTA)
P1735 - Gearbox parameters not learned	Easytronic (F13 MTA/F17+MTA)

VAG (Seat / Skoda / Volkswagen)

Codice di errore	Riparabile
P0562 / 16946 - System voltage, voltage too low	DSG 7 DQ200 (0AM)
P0701 / 17085 - Transmission control system, unlikely signal	DSG 6 DQ250 (02E)
P0715 / 17099 - Gearbox input speed sensor G182, error in electrical circuit	DSG 6 DQ250 (02E)
P0722 / 17106 - Speed sensor G195, no signal	DSG 6 DQ250 (02E)
P0735 / 17119 - 5th gear, incorrect ratio	DSG 6 DQ250 (02E)
P0746 / 17130 - Pressure control valve N215 fluid pressure, break / short circuit to ground	DSG 6 DQ250 (02E)
P0756 / 17140 - Solenoid valve 2 (N89), break / short circuit to ground	DSG 6 DQ250 (02E)
P0761 / 17145 - Solenoid valve 3 (N90), break / short circuit to ground	DSG 6 DQ250 (02E)
P0766 / 17150 - Solenoid valve 4 (N91), break / short circuit to ground	DSG 6 DQ250 (02E)
P0771 / 17155 - Solenoid valve 5 (N92), break / short circuit to ground	DSG 6 DQ250 (02E)
P0776 / 17160 - Pressure control valve 2 (N216), break / short circuit to ground	DSG 6 DQ250 (02E)
P0841 / 17225 - Sensor / pressure switch transmission fluid pressure A, Unlikely signal	DSG 7 DQ200 (0AM)
P1604 / 18012 - Control module defective	DSG 6 DQ250 (02E) DSG 7 DQ200 (0AM)
P171E - Transmission input shaft speed sensor 2 no signal	Multitronic / Hytronic VL381F 8-speed
P171F - Transmission input shaft speed sensor 2 implausible signal	Multitronic / Hytronic VL381F 8-speed
P177F - Hydraulic pump system, supply voltage too low	DSG 7 DQ200 (0AM)
P17BF - Hydraulic pump system, overload protection	DSG 7 DQ200 (0AM)
P1707 / 18115 - Fault in mechatronic module	DSG 6 DQ250 (02E)
P1740 / 18148 - Clutch temperature monitoring (G509)	DSG 6 DQ250 (02E)
P1746 / 18154 - Supply voltage for solenoid valve, electrical fault in circuit	DSG 6 DQ250 (02E)
P1813 / 18221 - Pressure control valve 1 (N215), electrical fault in circuit	DSG 6 DQ250 (02E)
P1814 / 18222 - Pressure control valve 1 (N215), interruption / short circuit to ground	DSG 6 DQ250 (02E)
P1815 / 18223 - Pressure control valve 1 (N215), short circuit to B +	DSG 6 DQ250 (02E)
P1818 / 18226 - Pressure control valve 2 (N216), electrical fault in circuit	DSG 6 DQ250 (02E)
P1819 / 18227 - Pressure control valve 2 (N216), break / short circuit to ground	DSG 6 DQ250 (02E)
P1820 / 18228 - Pressure control valve 2 (N216), short circuit to B +	DSG 6 DQ250 (02E)
P1823 / 18231 - Pressure control valve 3 (N217), electrical fault in circuit	DSG 6 DQ250 (02E)
P1824 / 18232 - Pressure control valve 3 (N217), interruption / short circuit to ground	DSG 6 DQ250 (02E)
P1825 / 18233 - Pressure control valve 3 (N217), short circuit to B +	DSG 6 DQ250 (02E)
P1828 / 18236 - Pressure control valve 4 (N218), electrical fault in circuit	DSG 6 DQ250 (02E)
P1829 / 18237 - Pressure control valve 4 (N218), interruption / short circuit to ground	DSG 6 DQ250 (02E)
P1830 / 18238 - Pressure control valve 4 (N218), short circuit to B +	DSG 6 DQ250 (02E)
P1833 / 18241 - Pressure control valve 5 (N233), electrical fault in circuit	DSG 6 DQ250 (02E)
P1834 / 18242 - Pressure control valve 5 (N233), interruption / short circuit to ground	DSG 6 DQ250 (02E)
P1835 / 18243 - Pressure control valve 5 (N233), short circuit to B +	DSG 6 DQ250 (02E)
P1838 / 18246 - Pressure control valve 6 (N371), electrical fault in circuit	DSG 6 DQ250 (02E)
P1839 / 18247 - Pressure control valve 6 (N371), break / short circuit to ground	DSG 6 DQ250 (02E)
P1840 / 18248 - Pressure control valve 6 (N371), short circuit to B +	DSG 6 DQ250 (02E)
P1895 / 18303 - Functional limitation due to pressure drop	DSG 7 DQ200 (0AM)
P189C - Functional limitation due to insufficient pressure	DSG 7 DQ200 (0AM)
P2732 / 19164 - Pressure control valve 6 (N371), break / short circuit to ground	DSG 6 DQ250 (02E)
U0101 / 28773 - No communication with TCM	DSG 7 DQ200 (0AM)