Powertrain, generic (extended)

P273B Transmission Friction Element H Apply Time Range/Performance

Check engine lightOn

EmissionsRelevant

Drive cycleRequired

Limp modePossible

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.

Likely causes

Pressure loss in the apply circuit of element H (seals, valve body)

Slow-responding valve controlling element H

Worn friction plates of element H

Symptoms

Delayed or harsh shifts involving element H
MIL lit
Transmission in fail-safe mode

Repair estimate

DifficultyShop_onlyWorkshop job

Parts and labour€150–4,000

Time1–12 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

friction element hhydraulic control unitpressure control solenoid

References: law.cornell.edu, newtonnet.co.uk.