P273B — Transmission Friction Element "H" Apply Time Range/Performance

P273B — Transmission Friction Element "H" Apply Time Range/Performance. A fault in the automatic transmission control. Short, gentle driving to a shop is usually possible. Typical causes: internal mechanical wear (clutches, torque converter), faulty transmission speed sensor, valve body wear.

powertrain (engine/transmission)

Is it safe to drive?

Drive with caution Drive only if the transmission still shifts predictably, and avoid highway speeds. Driving with slipping or limp mode accelerates internal wear — every kilometre can add to the final repair bill.

How to diagnose with an OBD scanner

  1. Read the code and freeze frame Connect an OBD2 scanner, confirm P273B is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
  2. Check for companion codes and TSBs Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many P0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
  3. Inspect wiring and connectors Visually inspect the wiring harness and connectors related to the automatic transmission control for damage, corrosion, chafing or poor contact.
  4. Subsystem check Compare the transmission friction element "H" apply time live reading against a known-good reference (specification or a correlated sensor) under the conditions from the freeze frame.
  5. Subsystem check Check transmission fluid level and condition — dark, burnt fluid points to internal wear.
  6. Subsystem check Read transmission-specific codes and live data (solenoid states, input/output speed) with a capable scanner.
  7. Verify the repair Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P273B does not return.

Approximate repair cost

Repair cost depends on which component actually failed. Typical scenarios for P273B (parts and labor, USD, independent shop rates): Transmission fluid service: $150–$350; Replace a shift solenoid: $300–$800; Valve body repair or replacement: $700–$1,500; Transmission rebuild or replacement: $2,500–$5,500. Overall, fixing P273B usually costs between $150 and $5,500. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.

Common questions

Will P273B clear itself?

Sometimes P273B clears after a few drive cycles if the fault was intermittent — for example a loose connector or a tank of bad fuel. The underlying cause usually remains, so the code tends to return. Clear it once; if it comes back, diagnose rather than erase it repeatedly.

What does OBD2 code P273B mean?

P273B — Transmission Friction Element "H" Apply Time Range/Performance. A fault in the automatic transmission control. Short, gentle driving to a shop is usually possible. Typical causes: internal mechanical wear (clutches, torque converter), faulty transmission speed sensor, valve body wear.

How much does it cost to fix P273B?

Transmission fluid service — $150–$350; Replace a shift solenoid — $300–$800; Valve body repair or replacement — $700–$1,500; Transmission rebuild or replacement — $2,500–$5,500. Exact cost depends on the root cause, your vehicle and local labor rates — a proper diagnosis is the cheapest first step.

Is it safe to drive with P273B?

Drive only if the transmission still shifts predictably, and avoid highway speeds. Driving with slipping or limp mode accelerates internal wear — every kilometre can add to the final repair bill.

What is the most common cause of P273B?

The most common causes are: internal mechanical wear (clutches, torque converter), faulty transmission speed sensor, valve body wear.

What does P273B mean?

P273B is logged by the onboard diagnostics when the automatic transmission control does not behave as expected. The official definition is “Transmission Friction Element "H" Apply Time Range/Performance”. This is a powertrain (engine/transmission) category code.

“Range/performance” means the signal from the transmission friction element "H" apply time is electrically valid but does not match what the module expects for current operating conditions. The wiring is usually intact; the problem is a degraded component, a drifted sensor or a mechanical fault upstream.

This code does not appear from a single bad reading: the module must see the fault condition repeat under defined operating conditions before it turns on the warning light. The freeze frame captured with P273B — engine load, rpm, temperature, speed — tells you exactly when the problem occurs, so reproduce those conditions when testing.

What causes P273B?

  • mechanical fault that the sensor correctly reports
  • incorrect calibration after a module update or battery disconnect
  • degraded or drifting transmission friction element "H" apply time
  • wiring or connector faults in the valve body harness
  • faulty transmission speed sensor
  • failed shift or pressure control solenoid
  • low or degraded transmission fluid
  • internal mechanical wear (clutches, torque converter)

Common symptoms of P273B

  • no movement in severe cases
  • harsh or delayed shifting
  • transmission stuck in one gear (limp mode)
  • slipping between gears
  • Check Engine or transmission warning light on
  • shuddering at highway speed

How to diagnose P273B

  1. Connect an OBD2 scanner, confirm P273B is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
  2. Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many P0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
  3. Visually inspect the wiring harness and connectors related to the automatic transmission control for damage, corrosion, chafing or poor contact.
  4. Compare the transmission friction element "H" apply time live reading against a known-good reference (specification or a correlated sensor) under the conditions from the freeze frame.
  5. Check transmission fluid level and condition — dark, burnt fluid points to internal wear.
  6. Read transmission-specific codes and live data (solenoid states, input/output speed) with a capable scanner.
  7. Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P273B does not return.

How to fix P273B

Start with the cheapest and most common causes before replacing expensive parts:

  • Transmission fluid service — $150–$350
  • Replace a shift solenoid — $300–$800
  • Valve body repair or replacement — $700–$1,500
  • Transmission rebuild or replacement — $2,500–$5,500

How much does it cost to fix P273B?

Repair cost depends on which component actually failed. Typical scenarios for P273B (parts and labor, USD, independent shop rates):

  • Transmission fluid service: $150–$350
  • Replace a shift solenoid: $300–$800
  • Valve body repair or replacement: $700–$1,500
  • Transmission rebuild or replacement: $2,500–$5,500

Overall, fixing P273B usually costs between $150 and $5,500. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.

Can you drive with P273B?

Drive only if the transmission still shifts predictably, and avoid highway speeds. Driving with slipping or limp mode accelerates internal wear — every kilometre can add to the final repair bill.

Related OBD2 codes