P273BTransmission Friction Element H Apply Time Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- 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.
- What you may notice
- Delayed or harsh shifts involving element H
- MIL lit
- Transmission in fail-safe mode
- Likely causes
- LikelyPressure loss in the apply circuit of element H (seals, valve body)
- PossibleSlow-responding valve controlling element H
- PossibleWorn friction plates of element H
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €150 – €4,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.