AutoCodes – Cadillac – P1521 Cadillac

P1521 Cadillac Code - Transmission Engaged At High Throttle Angle

Quick Answer

P1521 Cadillac indicates Transmission Engaged At High Throttle Angle. Common causes for P1521 Cadillac include wiring or connector problems, a faulty related sensor or actuator, and control module or calibration issues. 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: P1521 Cadillac indicates Transmission Engaged At High Throttle Angle.
Common causes: Common causes for P1521 Cadillac include wiring or connector problems, a faulty related sensor or actuator, and control module or calibration issues.
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 4,254

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Aug 27, 2019

Description
How To Fix
Cost to Diagnose
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Code P1521 Cadillac Description

OBDII Code P1521 Cadillac - Transmission Engaged At High Throttle Angle - AutoCodes.com — P1521 Cadillac Code - Transmission Engaged At High Throttle Angle

How to Fix the DTC P1521 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 P1521 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.