What it means
The transmission control module detected an incorrect shift from 5th gear. The code does not specify which component caused the shift error.
At a glance
- Usually lights the check-engine light
How it works
As the transmission shifts out of 5th gear, the TCM checks the commanded gear change, shift timing, and speed signals to verify the transition. This code indicates the shift from 5th was incorrect, but does not specify whether the cause is a solenoid, hydraulic issue, or internal wear.
Common causes
Most likely first.
- Shift solenoid sticking or malfunctioning
- Low or degraded transmission fluid
- Hydraulic pressure loss or valve body fault
- Worn or damaged clutch or friction element
- Internal transmission wear or damage
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
How to diagnose it
- Save freeze-frame data and inspect commanded gear, actual gear, speed readings, and related transmission codes for the event during the shift from 5th.
- Check fluid level and condition by the manufacturer’s procedure and look for leaks that could affect pressure during the shift.
- Inspect shift-solenoid and speed-sensor connectors and wiring for damage, corrosion, fluid intrusion, or loose terminals.
- Review live gear and speed data during a safe road test to see whether the TCM commands the shift and whether the speed response is delayed or implausible.
- If electrical signals check out, test solenoid response and hydraulic pressure using manufacturer procedures, then assess the relevant friction elements.
Common fixes
- Repair fluid leaks and correct the level using the specified fluid and procedure.
- Replace degraded or incorrect fluid when supported by inspection and service guidance.
- Repair wiring or connector faults in the shift-solenoid or speed-sensor circuits.
- Replace a shift solenoid confirmed faulty by testing.
- Repair a confirmed valve-body fault or worn internal friction element.
Can I keep driving?
Do not continue driving if the shift out of 5th slips heavily, shudders, or sends the transmission into limp mode; further slip can cause costly internal damage. If it still shifts reliably, use gentle acceleration and avoid towing until the fault is checked.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.