PowertrainP0743

Caution

Severity: Caution - get it checked when you can

Torque Converter Clutch Circuit Electrical

37 brands affected · Generic SAE J2012 description.

Key terms: SAE J2012: the standard generic code list · Powertrain: engine, transmission and emissions

1What it means in plain English

This range normally covers the transmission control system, but some manufacturers use P07-P09 codes for unrelated functions (fuel pump control, air-mix motors, lighting or windows). Check the description before assuming it is a transmission fault.

2Common causes

Low or dirty transmission fluid
Faulty shift solenoid
Faulty speed sensor
Wiring or connector fault
Internal transmission wear

3Can I drive?

Caution · drive with care

If the transmission slips, jerks, will not shift, or a transmission temperature warning is on, stop driving and let it cool: continuing can cause expensive damage. If the code names a different system (for example the fuel pump), treat it on its own terms; a fuel-pump control failure can stall the car, so have it checked before driving further. Otherwise drive gently to a workshop.

This page gives general information. It is not professional advice. For a definite diagnosis and a repair quote, ask a qualified mechanic to inspect the car.

4Brand data 37

Brand	Code	Description	System
Ashok Leyland CV	P0743	Torque Converter Clutch Circuit Electrical SAE	Powertrain
BAIC Motor	P0743	Torque Converter Clutch Circuit Electrical Brand	Powertrain
Mercedes-Benz	P0743	Torque Converter Clutch Circuit Electrical SAE	Powertrain
BMW	P0743	Open circuit Brand	Powertrain
BYD	P0743	TCC electrical Brand	Powertrain
Chery	P0743	TCC electrical Brand	Powertrain
Chrysler	P0743	Transmission control system Brand	Powertrain
Daewoo	P0743	Torque converter clutch circuit open Brand	Powertrain
Daihatsu	P0743	SL solenoid system Brand	Powertrain
DFFS	P0743	Torque Converter Clutch Circuit Electrical Brand	Powertrain
DFFX	P0743	TCC electrical Brand	Powertrain
DFXK	P0743	Torque Converter Clutch Circuit Electrical Brand	Powertrain
EOBD	P0743	Wandlerkupplungskreis elektrisch Brand	Powertrain
Geely	P0743	TCC electrical Brand	Powertrain
GM	P0743	Torque Converter Clutch Circuit Electrical Brand	Powertrain
Great Wall	P0743	TCC electrical Brand	Powertrain
Hafei	P0743	TCC electrical Brand	Powertrain
Holden	P0743	Torque Converter Clutch (TCC) Pressure Control Solenoid Valve Control Circuit Brand	Powertrain
Honda	P0743	Torque Converter Clutch Circuit Electrical SAE	Powertrain
Hyundai	P0743	Torque Converter Clutch Circuit Electrical SAE	Powertrain
Isuzu	P0743	Torque Converter Clutch Circuit Electrical SAE	Powertrain
Land Rover	P0743	Torque Converter Clutch Circuit Electrical SAE	Powertrain
Mitsubishi	P0743	TCC electrical Brand	Powertrain
Nissan	P0743	Torque Converter Clutch Circuit Electrical SAE	Powertrain
Opel	P0743	Torque Converter Clutch Circuit Electrical Brand	Powertrain
Perodua	P0743	SL solenoid system Brand	Powertrain
Peugeot	P0743	Torque Converter Clutch Circuit Electrical SAE	Powertrain
Porsche	P0743	Wandlerüberbrückungskupplung Brand	Powertrain
Proton	P0743	TCC electrical Brand	Powertrain
Saab	P0743	Wandlerkupplung-Schaltkreis Elektrik Brand	Powertrain
MG (SAIC)	P0743	Pressure regulator 6 Signal too big Brand	Powertrain
Smart	P0743	Torque Converter Clutch Circuit Electrical SAE	Powertrain
Sprinter	P0743	Torque Converter Clutch Circuit Electrical SAE	Powertrain
Subaru	P0743	Torque Converter Clutch Circuit Electrical Brand	Powertrain
Suzuki	P0743	Torque converter clutch circuit electrical Brand	Powertrain
Tata	P0743	Shift Solenoid A Electrical Brand	Powertrain
Toyota	P0743	Torque converter clutch (TCC) solenoid valve failure Brand	Powertrain

Legend: SAE is the generic J2012 description; Brand is text taken from that manufacturer’s data. Manufacturer rows keep the wording and language of the source data, and non-English text is tagged so screen readers pronounce it correctly.

5Extended variant codes 3

These 7-character codes are manufacturer-specific variants of P0743 and may be reported by some scan tools.

Brand	Code	Description	System
Mercedes-Benz	P074300	Getriebesteuergerät hat Funktionsstörung (OBD-Fehler 05). Brand	Powertrain
Hyundai	P074300	If lack of Torque Converter Clutch Solenoid Valve circuit continuity is detected, PCM/TCM sets DTC Brand	Powertrain
SsangYong	P074300	Transmission malfunction: lockup converter clutch Brand	Powertrain

6Related codes

Browse Pxxx codes or P074xx codes.