AutoCodes – Cadillac – P1442 Cadillac

P1442 Cadillac Code - EVAP Vacuum Switch Static Test Malfunction

Quick Answer

The Powertrain Control Module (PCM) monitors the Evaporative System (EVAP) Vacuum Switch for malfunction. Common causes include Faulty EVAP Vacuum Switch, EVAP Vacuum Switch harness is open or shorted, EVAP Vacuum Switch 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: P1442 Cadillac indicates EVAP Vacuum Switch Static Test Malfunction.
Common causes: Common causes include Faulty EVAP Vacuum Switch, EVAP Vacuum Switch harness is open or shorted, EVAP Vacuum Switch 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 3,191

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 Mar 19, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
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Code P1442 Cadillac Description

The Powertrain Control Module (PCM) monitors the Evaporative System (EVAP) Vacuum Switch for malfunction. The Diagnostic Trouble Code (DTC) will set when the PCM detects the EVAP Vacuum Switch is not to factory specifications.

OBDII Code P1442 Cadillac - EVAP Vacuum Switch Static Test Malfunction - AutoCodes.com — P1442 Cadillac Code - EVAP Vacuum Switch Static Test Malfunction

What does this mean?

What are the Possible Causes of the DTC P1442 Cadillac?

Faulty EVAP Vacuum Switch
EVAP Vacuum Switch harness is open or shorted
EVAP Vacuum Switch circuit poor electrical connection

How to Fix the DTC P1442 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 P1442 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.