Faulty shift solenoid or clutch pressure control solenoid sticking or stuck on; Valve body wear, sticking valves or internal hydraulic faults; Low, degraded or contaminated transmission fluid; Faulty input or output speed sensor giving incorrect readings; Wiring or connector damage between the transmission control module and the transmission; Mechanical damage to clutches, gear sets or selector components (such as a seized or broken clutch pack or selector fork in an automated manual or dual clutch unit); Transmission control module fault or outdated software where a known issue exists for that model.

P0893

Multiple Gears Engaged.

Generic
Powertrain
Generic code
High severity

How this code is built

P: SystemPowertrain
0: Defined bySAE, the same on every car
8: AreaTransmission
93: FaultThe specific fault in that area

What it means

P0893 means the transmission control module has detected that more than one gear is engaged at the same time. It sets when the input and output shaft speeds, or the clutch and shift element commands and feedback, do not match what a single selected gear should produce. This is a transmission fault and the exact detection method depends on the transmission type and model.

Symptoms

Gearbox goes into limp mode or stays in one gear
Harsh shifts, shuddering or a sudden jolt on gear changes
Gearbox feels as if it is binding or the engine is being held back
Transmission warning light or malfunction indicator lamp on
Engine stalling or the car refusing to move when selecting drive or reverse
Flaring or slipping between gear changes

Possible causes

Faulty shift solenoid or clutch pressure control solenoid sticking or stuck onlikely
Valve body wear, sticking valves or internal hydraulic faultslikely
Low, degraded or contaminated transmission fluidpossible
Faulty input or output speed sensor giving incorrect readingspossible
Wiring or connector damage between the transmission control module and the transmissionpossible
Mechanical damage to clutches, gear sets or selector components (such as a seized or broken clutch pack or selector fork in an automated manual or dual clutch unit)possible
Transmission control module fault or outdated software where a known issue exists for that modelrare

How to diagnose

Read all stored codes and freeze frame data, noting gear selected, speeds and fluid temperature when the fault set
Check for related codes such as speed sensor, solenoid or gear ratio faults, as these can point to the root cause
Check transmission fluid level and condition where a dipstick or check procedure exists, as the method varies by model
Inspect transmission wiring, connectors and the harness for damage, corrosion, chafing or fluid ingress
Compare live input speed, output speed and engine speed data against the commanded gear to find a mismatch
Test solenoid and speed sensor circuits for resistance and signal against the manufacturer specification
Check for any technical service bulletins or software updates for the specific model and transmission
Carry out a line pressure or hydraulic test, or inspect the valve body and clutches, if electrical checks pass

How to fix

Repair or replace damaged wiring and connectors
Replace the faulty speed sensor or shift solenoid
Correct the fluid level or change the fluid and filter to the manufacturer specification where fluid condition is the cause
Repair or replace the valve body or worn hydraulic components
Overhaul or replace the transmission if internal clutches or gears are damaged
Update or replace the transmission control module software or unit only where a fault or known issue is confirmed

Can I keep driving?

High severity

Avoid driving the car if you can, as engaging two gears at once can seriously damage the transmission and could cause sudden loss of drive or locking. If the car is in limp mode, drive only a short distance to a safe place or workshop, or arrange recovery.

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