OBD Guide
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P1811

Maximum Adaptive & Long Term Shift

P1811 is an OBD-II diagnostic trouble code meaning: Maximum Adaptive & Long Term Shift. Common causes: wear of friction elements of the gearbox, low or contaminated transmission fluid. Estimated repair cost: $17–89.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–89 (est.)

Symptoms

  • Hard or delayed gear shifts
  • Dips when switching
  • Increased speed before shifting
  • Transmission overheating
  • Check Engine light comes on

Causes

  • Wear of friction elements of the gearbox
  • Low or contaminated transmission fluid
  • Shift solenoids malfunction
  • Hydraulic pressure problems
  • Wear of transmission mechanical components

How to Fix

  1. Check the level and condition of the transmission fluid
  2. Replace fluid and filter if necessary
  3. Carry out diagnostics of switching solenoids
  4. Check the hydraulic pressure in the system
  5. Perform gearbox adaptation using a scanner

Related codes

P0700P0711P0720

Error P1811 by Vehicle Brand

BuickCadillacChevroletGMGMCOldsmobileSaturn

FAQ

What does the P1811 code mean?

P1811 is an OBD-II diagnostic trouble code that indicates: Maximum Adaptive & Long Term Shift

What causes a P1811 error code?

The most common causes of P1811 include: Wear of friction elements of the gearbox; Low or contaminated transmission fluid; Shift solenoids malfunction; Hydraulic pressure problems.

How do I fix a P1811 diagnostic trouble code?

To fix P1811: Check the level and condition of the transmission fluid. Replace fluid and filter if necessary. Carry out diagnostics of switching solenoids. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1811?

Limited driving only, diagnose soon

How much does it cost to fix P1811?

The estimated repair cost for P1811 is $17–89. Actual cost depends on your vehicle, location, and labor rates.

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