AutoCodes – Cadillac – P146E Cadillac

P146E Cadillac Code - EVAP Purge System Pressure Sensor Circuit High Voltage

Quick Answer

The EVAP Purge System Pressure Sensor is a 3-wire piezo-resistive pressure transducer integrated into the Evaporative Emission Purge Pump. Common causes include Faulty Evaporative Emission Purge Pump, Evaporative Emission Purge Pump harness is open or shorted, Evaporative Emission Purge Pump 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: P146E Cadillac indicates EVAP Purge System Pressure Sensor Circuit High Voltage.
Common causes: Common causes include Faulty Evaporative Emission Purge Pump, Evaporative Emission Purge Pump harness is open or shorted, Evaporative Emission Purge Pump 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 394

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 13, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P146E Cadillac Description

The EVAP Purge System Pressure Sensor is a 3-wire piezo-resistive pressure transducer integrated into the Evaporative Emission Purge Pump. It measures pressure within the pump, a critical component of the vehicle's emissions control system. This integration ensures precise pressure measurement for effective emission control, reducing harmful pollutants. The Diagnostic Trouble Code (DTC) will be set when the EVAP Purge Pump Pressure Sensor signal is greater than 4.8 V for greater than 1 s.

OBDII Code P146E Cadillac - EVAP Purge System Pressure Sensor Circuit High Voltage - AutoCodes.com — P146E Cadillac Code - EVAP Purge System Pressure Sensor Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P146E Cadillac?

Faulty Evaporative Emission Purge Pump
Evaporative Emission Purge Pump harness is open or shorted
Evaporative Emission Purge Pump circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P146E 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 P146E 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.

Frequently Asked Questions about P146E Cadillac Code

1. What does OBDII code P146E mean on a Cadillac?

P146E indicates a high voltage issue in the EVAP Purge System Pressure Sensor Circuit, which is part of the vehicle's evaporative emissions control system.

2. What are the common symptoms of code P146E in a Cadillac?

Symptoms may include the check engine light turning on, a fuel smell, reduced fuel efficiency, and difficulty passing emissions tests.

3. What causes code P146E to appear on a Cadillac?

Possible causes include a faulty EVAP purge pressure sensor, wiring issues like shorts or damaged connectors, or a malfunctioning EVAP purge valve.

4. Can I drive my Cadillac with code P146E active?

While the vehicle may still run, driving with this code active can lead to increased emissions and potential damage to the EVAP system over time.

5. How do I diagnose code P146E on a Cadillac?

Diagnosis typically involves scanning for trouble codes, visually inspecting the EVAP pressure sensor and wiring, and testing the sensor with a multimeter.

6. How do I fix code P146E on my Cadillac?

Common fixes include replacing the EVAP purge pressure sensor, repairing damaged wiring or connectors, or replacing the EVAP purge valve if faulty.

7. How much does it cost to repair code P146E in a Cadillac?

Repair costs can range from $100 to $300 depending on whether you need a new sensor, valve, or wiring repairs.

8. Can a loose gas cap cause code P146E in a Cadillac?

No, a loose gas cap typically triggers other EVAP-related codes, but P146E is specific to the pressure sensor circuit.

9. Will code P146E cause my Cadillac to fail an emissions test?

Yes, this code can cause your vehicle to fail emissions testing due to improper EVAP system operation.

10. How can I prevent code P146E from recurring in my Cadillac?

Regular maintenance of the EVAP system, checking sensors and wiring for damage, and promptly addressing any related codes can help prevent recurrence.