P273B code meaning
Transmission Friction Element H Apply Time Range/Performance
Powertrain system Generic code P27xx codes Check engine light
What P273B means
P273B is the apply-time check for an eighth shift element, H, and therefore only applies to gearboxes with at least eight clutches and brakes. The test is the same as for its siblings: the time between command and full engagement is compared with a calibrated window, and a result outside it sets the code. No manufacturer documents P273B publicly. Ford's 2012 OBD summary notes that its newer automatics report clutch faults through solenoid stuck-on/stuck-off codes instead of the older element codes, which shows these generic apply-time codes are optional for a maker. CARB still expects transmission controls to be monitored where they affect emissions. Element H shares nothing with P273A except the method; mixing up the letters across gearboxes leads to the wrong part being replaced.
P273B at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor1 to 12 hours
- Clears after repairAfter a drive cycle
Symptoms of P273B
- Delayed or harsh shifts involving element H
- MIL lit
- Transmission in fail-safe mode
Common causes of P273B
- Most likelyPressure loss in the apply circuit of element H (seals, valve body)
- PossibleSlow-responding valve controlling element H
- PossibleWorn friction plates of element H
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Friction element hHydraulic control unitPressure control solenoid
What each part of P273B means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 7 | Area: transmission. |
| 3B | The exact fault in that area. |
What to do next
- Note P273B and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P273B
What does P273B mean?
P273B means "Transmission Friction Element H Apply Time Range/Performance". P273B is the apply-time check for an eighth shift element, H, and therefore only applies to gearboxes with at least eight clutches and brakes. It is a generic code, so it means the same on every make.
Is it safe to drive with P273B?
Drive gently and only to a workshop. With P273B the car can go into limp mode (reduced power) to protect itself.
Will P273B fail an emissions test?
Yes, it can. P273B is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P273B to fix?
Difficulty: workshop only. A typical repair takes 1 to 12 hours of work. This is a job for a workshop.
Will P273B clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.