6HP19A, 09L, 6HP19AV
6HP19A, 09L, 6HP19AV
The ZF 6HP19A / 6HP19AV, commonly identified by Audi/VW as 09L / AL420-6Q, is a 6-speed electronically controlled automatic transmission developed for longitudinal-engine quattro/all-wheel-drive applications. Derived from the ZF 6HP19 family, it uses a hydrodynamic torque converter with controlled lock-up clutch, planetary gearsets and integrated mechatronic control to provide six forward ratios. Audi specifies the 09L for applications producing up to approximately 450 Nm of input torque.
Specification: 6-speed automatic • ZF 6HP19A / 6HP19AV • Audi/VW 09L • Audi AL420-6Q • Longitudinal installation • Permanent quattro/AWD applications • Torque converter with controlled lock-up clutch • Planetary automatic transmission • Integrated electro-hydraulic mechatronic control • Torsen centre differential on applicable Audi versions • 4.171:1 first gear • 0.691:1 sixth gear • Approximately 6.04:1 ratio spread • Maximum input torque approximately 450 Nm • Multiple application-specific gearbox and mechatronic variants.
The 09L / 6HP19A family is fitted to selected Audi A4/S4/RS4, A6/Allroad, A8 and Q7 applications, together with selected Volkswagen Phaeton versions. Numerous OEM gearbox codes and ZF 1071 transmission variants exist, so the VIN, complete transmission number, OEM gearbox code and individual component identification should always be confirmed before ordering replacement parts.
Common Faults
Common 6HP19A / 09L problems include valve-body and mechatronic faults, pressure-control or solenoid wear, torque-converter lock-up wear, hydraulic leakage and internal clutch wear. Symptoms can include harsh or delayed shifts, shift flare, slipping, converter judder, incorrect gears, transmission warnings and failsafe operation.
Valve-body wear and hydraulic pressure loss can cause significant shift-quality problems without necessarily indicating major internal failure. Diagnosis should include fault codes, adaptations, hydraulic operation, converter function and fluid condition before internal components are replaced.
Common Fault Codes
| Fault Code | Description |
|---|---|
| P0700 | Transmission control system fault / additional TCM faults stored |
| P0711 | Transmission fluid temperature sensor range / performance fault |
| P0715 | Input / turbine speed sensor circuit fault |
| P0716 | Input / turbine speed sensor range / performance fault |
| P0720 | Output speed sensor circuit fault |
| P0721 | Output speed sensor range / performance fault |
| P0730 | Incorrect transmission gear ratio |
| P0731 | Incorrect 1st gear ratio |
| P0732 | Incorrect 2nd gear ratio |
| P0733 | Incorrect 3rd gear ratio |
| P0734 | Incorrect 4th gear ratio |
| P0735 | Incorrect 5th gear ratio |
| P0741 | Torque converter clutch performance / lock-up fault |
| P0742 | Torque converter clutch stuck on |
| P0748 | Pressure-control solenoid electrical fault |
| P0868 | Transmission fluid / line pressure too low |
Component parts sold separately listed below
Core units listed via the button above
The ZF 6HP19A / 6HP19AV, commonly identified by Audi/VW as 09L / AL420-6Q, is a 6-speed electronically controlled automatic transmission developed for longitudinal-engine quattro/all-wheel-drive applications. Derived from the ZF 6HP19 family, it uses a hydrodynamic torque converter with controlled lock-up clutch, planetary gearsets and integrated mechatronic control to provide six forward ratios. Audi specifies the 09L for applications producing up to approximately 450 Nm of input torque.
Specification: 6-speed automatic • ZF 6HP19A / 6HP19AV • Audi/VW 09L • Audi AL420-6Q • Longitudinal installation • Permanent quattro/AWD applications • Torque converter with controlled lock-up clutch • Planetary automatic transmission • Integrated electro-hydraulic mechatronic control • Torsen centre differential on applicable Audi versions • 4.171:1 first gear • 0.691:1 sixth gear • Approximately 6.04:1 ratio spread • Maximum input torque approximately 450 Nm • Multiple application-specific gearbox and mechatronic variants.
The 09L / 6HP19A family is fitted to selected Audi A4/S4/RS4, A6/Allroad, A8 and Q7 applications, together with selected Volkswagen Phaeton versions. Numerous OEM gearbox codes and ZF 1071 transmission variants exist, so the VIN, complete transmission number, OEM gearbox code and individual component identification should always be confirmed before ordering replacement parts.
Common Faults
Common 6HP19A / 09L problems include valve-body and mechatronic faults, pressure-control or solenoid wear, torque-converter lock-up wear, hydraulic leakage and internal clutch wear. Symptoms can include harsh or delayed shifts, shift flare, slipping, converter judder, incorrect gears, transmission warnings and failsafe operation.
Valve-body wear and hydraulic pressure loss can cause significant shift-quality problems without necessarily indicating major internal failure. Diagnosis should include fault codes, adaptations, hydraulic operation, converter function and fluid condition before internal components are replaced.
Common Fault Codes
| Fault Code | Description |
|---|---|
| P0700 | Transmission control system fault / additional TCM faults stored |
| P0711 | Transmission fluid temperature sensor range / performance fault |
| P0715 | Input / turbine speed sensor circuit fault |
| P0716 | Input / turbine speed sensor range / performance fault |
| P0720 | Output speed sensor circuit fault |
| P0721 | Output speed sensor range / performance fault |
| P0730 | Incorrect transmission gear ratio |
| P0731 | Incorrect 1st gear ratio |
| P0732 | Incorrect 2nd gear ratio |
| P0733 | Incorrect 3rd gear ratio |
| P0734 | Incorrect 4th gear ratio |
| P0735 | Incorrect 5th gear ratio |
| P0741 | Torque converter clutch performance / lock-up fault |
| P0742 | Torque converter clutch stuck on |
| P0748 | Pressure-control solenoid electrical fault |
| P0868 | Transmission fluid / line pressure too low |