AutoCodes – Cadillac – P1811 Cadillac

P1811 Cadillac Code - Maximum Adaptive & Long Term Shift

Quick Answer

With the engine running and an adaptable shift has occurred, the Powertrain Control Module (PCM) detects during the following conditions occurred twice per trip: Condition 1: 1-2 Shift over 0.65 seconds and 1 -2 Shift adaptive reached its limit. Common causes include Faulty Pressure Control Solenoid, Pressure Control Solenoid harness is open or shorted, Pressure Control Solenoid circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P1811 Cadillac indicates Maximum Adaptive & Long Term Shift.
Common causes
Common causes include Faulty Pressure Control Solenoid, Pressure Control Solenoid harness is open or shorted, Pressure Control Solenoid circuit poor electrical connection.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code Popularity 9,480
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Sep 20, 2019
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Code P1811 Cadillac Description

With the engine running and an adaptable shift has occurred, the Powertrain Control Module (PCM) detects during the following conditions occurred twice per trip: Condition 1: 1-2 Shift over 0.65 seconds and 1 -2 Shift adaptive reached its limit. Case 2: 2-3 Shift over 0.65 seconds and 2-3 Shift adaptive reached its limit. Case 3: 3-4 Shift over 0.65 seconds and 3-4 Shift adaptive reached its limit.
OBDII Code P1811 Cadillac - Maximum Adaptive & Long Term Shift - AutoCodes.com
P1811 Cadillac Code - Maximum Adaptive & Long Term Shift

What are the Possible Causes of the DTC P1811 Cadillac?

  • Faulty Pressure Control Solenoid
  • Pressure Control Solenoid harness is open or shorted
  • Pressure Control Solenoid circuit poor electrical connection

How to Fix the DTC P1811 Cadillac?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1811 Cadillac code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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