AutoCodes – Cadillac – P1815 Cadillac

P1815 Cadillac Code - A/T Range Sensor Circuit Malfunction

Quick Answer

P1815 Cadillac indicates A/T Range Sensor Circuit Malfunction. Common causes include Faulty A/T Range Sensor, Faulty Transmission Fluid Pressure (TFP) Manual Valve Position Switch, TFP Manual Valve Position Switch harness is open or shorted. 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: P1815 Cadillac indicates A/T Range Sensor Circuit Malfunction.
Common causes: Common causes include Faulty A/T Range Sensor, Faulty Transmission Fluid Pressure (TFP) Manual Valve Position Switch, TFP Manual Valve Position Switch harness is open or shorted.
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 6,544

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Sep 20, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P1815 Cadillac Description

OBDII Code P1815 Cadillac - A/T Range Sensor Circuit Malfunction - AutoCodes.com — P1815 Cadillac Code - A/T Range Sensor Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC P1815 Cadillac?

Faulty A/T Range Sensor
Faulty Transmission Fluid Pressure (TFP) Manual Valve Position Switch
TFP Manual Valve Position Switch harness is open or shorted
TFP Manual Valve Position Switch circuit poor electrical connection

How to Fix the DTC P1815 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 P1815 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.