Low, degraded or contaminated transmission fluid, or the wrong fluid type; Faulty shift solenoid, pressure control solenoid or valve body wear affecting sixth gear or its clutch circuit; Wiring or connector fault in the transmission harness, such as chafing, corrosion or water ingress; Faulty input or output speed sensor giving a wrong ratio reading; Worn clutch pack or clutch assembly, or a selector actuator or fork fault, depending on gearbox type; Transmission control unit fault or outdated software where the manufacturer has issued a known fix; Internal mechanical damage such as a worn or broken gear, synchroniser or shift mechanism.

P074E

Unable To Engage Gear 6.

Generic
Powertrain
Generic code
Medium severity

How this code is built

P: SystemPowertrain
0: Defined bySAE, the same on every car
7: AreaTransmission
4E: FaultThe specific fault in that area

What it means

P074E means the transmission control unit has detected that the transmission could not engage sixth gear when it was commanded. The unit compares the requested gear with what it sees from the speed sensors, gear position feedback or ratio calculation, and sets the code when they do not match. The exact way sixth gear is selected depends on the transmission type (conventional automatic, automated manual or dual clutch), so the details vary by model.

Symptoms

Gearbox will not shift into sixth gear, or drops out of it
Transmission warning light or engine light on
Car stays in fifth or a lower gear on the motorway, with higher revs and worse fuel economy
Harsh, delayed or flaring shifts when going up to sixth
Limp mode with restricted gears or reduced performance
Gear indicator flashing or showing a fault

Possible causes

Low, degraded or contaminated transmission fluid, or the wrong fluid typelikely
Faulty shift solenoid, pressure control solenoid or valve body wear affecting sixth gear or its clutch circuitlikely
Wiring or connector fault in the transmission harness, such as chafing, corrosion or water ingresspossible
Faulty input or output speed sensor giving a wrong ratio readingpossible
Worn clutch pack or clutch assembly, or a selector actuator or fork fault, depending on gearbox typepossible
Transmission control unit fault or outdated software where the manufacturer has issued a known fixrare
Internal mechanical damage such as a worn or broken gear, synchroniser or shift mechanismrare

How to diagnose

Read all stored codes and freeze frame data to see speed, load, temperature and gear at the time the fault set, and note any other transmission or speed sensor codes
Check the transmission fluid level and condition (where a check is possible on the model), looking for a burnt smell, debris or the wrong fluid
Inspect the transmission wiring, connectors and earths for damage, corrosion, leaks or fluid contamination
Check for any manufacturer service bulletins or software updates for the specific model and gearbox
Use live data to compare commanded gear, actual gear and the input and output speed readings during a road test
Test the speed sensors and their wiring for correct signals and resistance, following the manufacturer's procedure
Test the shift and pressure solenoids, and check the valve body or actuator operation against specification
If electrical and fluid checks pass, carry out pressure or clutch tests per the manufacturer's procedure to assess internal wear

How to fix

Correct the fluid level, or service the transmission with the correct specification fluid and filter where applicable
Repair or replace damaged wiring, connectors or terminals in the transmission harness
Replace a faulty speed sensor, shift solenoid or pressure control solenoid, or repair the valve body as required
Repair or replace a faulty selector actuator or fork on automated manual or dual clutch units
Update the control unit software only where an updated calibration is a known fix for this fault, or repair or replace the control unit if it is proven faulty
Overhaul or replace the transmission if internal clutch or gear damage is confirmed

Can I keep driving?

Medium severity

The car can usually be driven short distances in the remaining gears, but avoid long motorway runs and heavy loads. Continued use with slipping or harsh shifts can damage the transmission, so have it diagnosed soon.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.