P07DA
6-7 Shift.
- Generic
- Powertrain
- Generic code
- Medium severity
How this code is built
- P
- SystemPowertrain
- 0
- Defined bySAE, the same on every car
- 7
- AreaTransmission
- DA
- FaultThe specific fault in that area
What it means
P07DA is a generic transmission code relating to the 6-7 shift, meaning the transmission control unit has detected a problem when the gearbox changes between sixth and seventh gear. It usually sets when the measured input/output speed ratio, shift timing or clutch behaviour does not match what was commanded. The exact wording (shift error, slip, performance or similar) varies by manufacturer and gearbox, so check the definition in the vehicle-specific data.
Symptoms
- Gearbox warning light or malfunction indicator lamp on
- Harsh, delayed or flaring shift between sixth and seventh gear
- Engine revs rising without matching road speed at higher gears
- Gearbox stuck in a lower gear or in limp mode
- Poorer fuel economy at cruising speed
- Shudder or judder when the gearbox changes up or down at motorway speeds
Possible causes
- Low, degraded or incorrect transmission fluidlikely
- Faulty shift solenoid, pressure control solenoid or sticking valve body componentlikely
- Wiring or connector damage between the transmission and control unit, such as chafing, corrosion or water ingresspossible
- Faulty input or output speed sensor giving an incorrect ratio readingpossible
- Worn or slipping clutch pack or internal mechanical wear affecting the gears involvedpossible
- Outdated or faulty transmission control unit software, where the manufacturer has a known fix for the modelrare
- Internal fault in the transmission control unitrare
How to diagnose
- Read all stored and pending codes and record the freeze frame data, noting road speed, gear, fluid temperature and load when the fault set
- Check for other transmission, engine or speed sensor codes, as these may point to the real cause
- Check the fluid level and condition (colour, smell, debris) using the procedure for that gearbox, as some are sealed and need a temperature-controlled check
- Inspect the transmission wiring, connectors and earths for damage, corrosion, fluid contamination or loose pins
- Use live data to compare input and output speed readings and the commanded against actual gear during a road test
- Test the resistance and operation of the relevant solenoids and speed sensors against the manufacturer specification
- Check for software updates or technical bulletins for the model and gearbox
- If the fault persists, carry out pressure tests or inspect the internal components as the manufacturer procedure directs
How to fix
- Correct the fluid level or replace degraded fluid and filter using the specified fluid type
- Repair or replace damaged wiring, connectors or terminals
- Replace a faulty speed sensor or shift or pressure solenoid
- Clean or repair the valve body, or replace it if it is worn or sticking
- Repair or overhaul the transmission if internal clutch or mechanical wear is confirmed
- Update the transmission control unit software only if a known fault with the existing calibration is confirmed for that model
Can I keep driving?
The car can usually be driven carefully for a short time, but avoid heavy loads and high speeds and have it checked soon. Continued driving with slipping or harsh shifts can cause further internal gearbox damage, and if the car goes into limp mode or slips badly it should be stopped and recovered.
Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.