What does this code mean?
The lock-up clutch does not achieve the expected operating result. The wording may mention a circuit, but the failure is not necessarily electrical: hydraulic pressure loss or mechanical damage can cause the observed performance. Honda documents a cracked lock-up piston on a specifically identified Accord application.
Sources and interpretation [1]
A code identifies a detected condition, not a part that must automatically be replaced.
Before replacing a part
Confirm transmission type and capture lock-up command, slip data and related codes using the vehicle's procedure. For the Honda example, check VIN eligibility and current coverage with Honda; the 2023 bulletin does not establish that a vehicle is still under warranty today.
Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
P074100Torque Converter Clutch Circuit PerformanceManufacturer communications
9Original wording in English
AUDI
Reported code forms P074100
Supersedes Technical Service Bulletin Group 37 number 14-22 dated May 1, 2014. Transmission warning may appear in instrument cluster. After ignition cycle, the warning message is no longer present. DTC P074100 (Torque…
AUDI
Reported code forms P074100
Supersedes Technical Service Bulletin Group 37 number 13-01 dated April 24, 2013. Transmission warning may appear in instrument cluster. After ignition cycle, the warning message is no longer present. DTC P074100…
AUDI
Reported code forms P074100
Supersedes Technical Service Bulletin Group 37 number 13-97 dated March 4, 2013. Customer may report transmission warning lamp illuminated in instrument cluster. After ignition cycle, the warning message is no longer…
AUDI
Reported code forms P074100
Supersedes Technical Service Bulletin Group 37 number 13-86 dated February 6, 2013. Customer may report transmission warning lamp illuminated in instrument cluster. After ignition cycle, the warning message is no longer…
AUDI
Reported code forms P074100
Supersedes Technical Service Bulletin Group 37 number 13-85 dated February 4, 2013. Customer may report transmission warning lamp illuminated in instrument cluster. After ignition cycle, the warning message is no longer…
AUDI
Reported code forms P074100
Supersedes Technical Service Bulletin Group 37 number 13-80 dated January 16, 2013. Customer may report transmission warning lamp illuminated in instrument cluster. After ignition cycle, the warning message is no longer…
Check vehicle applicability
1A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Audi | A5 | 2012 |
Historical records · 13 · Historical vehicle association; OBD-II compatibility is not established by this record.
Sources and interpretation
These explanations are editorial summaries of the linked manufacturer material. PDF page numbers count from the first file page. Original publications are in English; translations are reference aids. A cited edition is not a claim that it is the manufacturer's latest instruction.
- 23-076 · 2017 Accord 6AT torque converter, P0741 ↗
American Honda Motor Co. · PDF page(s) 1, 2 ·
Source check date · 2026-10-27
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.