What it means
The transmission control module monitors how long friction element G takes to apply. This code sets when the measured apply time falls outside the expected range.
At a glance
- Usually lights the check-engine light
How it works
Friction element G is an internal transmission clutch or other friction unit that applies to engage particular gear paths. The TCM monitors how long element G takes to apply and sets P273A when that time falls outside its expected range, which can point to wear, pressure-control drift, or a hydraulic leak.
Common causes
Most likely first.
- Worn clutch friction plates
- Pressure control solenoid drift
- Internal hydraulic leak in apply circuit
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
- Record freeze-frame data, gear, temperature, and shift timing when P273A set, and scan for related transmission codes.
- Check transmission fluid level and condition according to the manufacturer's procedure; note burnt odor or debris if present.
- Use scan-tool data to identify the shifts that command friction element G and compare its apply behavior with the expected pattern.
- Inspect external connectors and wiring for the relevant pressure-control solenoid and check its circuit against the wiring diagram.
- Have line pressure and the element G apply circuit evaluated using the manufacturer's procedures if scan data and basic checks do not explain the apply delay.
- If pressure control and external circuits pass, assess internal wear or leakage in friction element G's hydraulic apply path.
Common fixes
- Correct low or degraded transmission fluid using the vehicle maker's specified fluid and service procedure.
- Repair an electrical fault or replace a pressure-control solenoid shown by testing to be drifting.
- Repair a leak in friction element G's internal hydraulic apply circuit.
- Repair or replace worn friction plates in element G if inspection confirms internal wear.
Can I keep driving?
Avoid towing, steep climbs, and hard acceleration if the transmission slips or shudders; continued slipping can overheat and damage the clutch pack. Stop if the vehicle loses drive or cannot maintain a safe gear.
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.