AutoCodes – Cadillac – P1643 Cadillac

P1643 Cadillac Code - Wait To Start Lamp Control Circuit Conditions

Quick Answer

With the key on or engine running, then with the Wait To Start lamp requested on (Test 1), the Powertrain Control Module (PCM) detects that the voltage ON the lamp control circuit was high, or with the lamp requested off, that the voltage on the lamp control circuit was near zero (0) volts. Common causes include Faulty Wait To Start Lamp, Wait To Start Lamp harness is open or shorted, Wait To Start Lamp 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: P1643 Cadillac indicates Wait To Start Lamp Control Circuit Conditions.
Common causes: Common causes include Faulty Wait To Start Lamp, Wait To Start Lamp harness is open or shorted, Wait To Start Lamp 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 3,399

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 Sep 04, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P1643 Cadillac Description

OBDII Code P1643 Cadillac - Wait To Start Lamp Control Circuit Conditions - AutoCodes.com — P1643 Cadillac Code - Wait To Start Lamp Control Circuit Conditions

What does this mean?

What are the Possible Causes of the DTC P1643 Cadillac?

Faulty Wait To Start Lamp
Wait To Start Lamp harness is open or shorted
Wait To Start Lamp circuit poor electrical connection

How to Fix the DTC P1643 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 P1643 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.

Need more information about the P1643 Cadillac code?

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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.