AutoCodes – Pontiac – P0443 Pontiac

P0443 Pontiac Code - Evaporative Emission Purge Solenoid Valve Control Circuit

Quick Answer

The Evaporative Emission (EVAP) Purge Solenoid Valve is used to purge fuel vapor from the EVAP canister to the intake manifold. Common causes include Faulty Evaporative Emission (EVAP) Purge Solenoid Valve, Evaporative Emission Purge Solenoid Valve harness is open or shorted, Evaporative Emission Purge Solenoid Valve circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: P0443 Pontiac indicates Evaporative Emission Purge Solenoid Valve Control Circuit.
Common causes: Common causes include Faulty Evaporative Emission (EVAP) Purge Solenoid Valve, Evaporative Emission Purge Solenoid Valve harness is open or shorted, Evaporative Emission Purge Solenoid Valve circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 10,338

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 27, 2022

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0443 Pontiac Description

The Evaporative Emission (EVAP) Purge Solenoid Valve is used to purge fuel vapor from the EVAP canister to the intake manifold. The EVAP purge solenoid valve is Pulse Width Modulated (PWM). Ignition voltage is supplied directly to the EVAP purge solenoid valve. The Engine Control Module (ECM) controls the solenoid valve by grounding the control circuit with a solid-state device called a driver. The driver is equipped with a feedback circuit that is pulled up to a voltage. The ECM can determine if the control circuit is open, shorted to the ground, or shorted to a voltage by monitoring the feedback voltage. The Diagnostic Trouble Code (DTC) will be set when the ECM detects the EVAP purge solenoid valve control circuit is open within 0.25 s.

OBDII Code P0443 Pontiac - Evaporative Emission Purge Solenoid Valve Control Circuit - AutoCodes.com — P0443 Pontiac Code - Evaporative Emission Purge Solenoid Valve Control Circuit

What does this mean?

What are the Possible Causes of the DTC P0443 Pontiac?

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

How to Fix the DTC P0443 Pontiac?

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 P0443 Pontiac 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 P0443 Pontiac Code

What does the OBDII code P0443 mean on a Pontiac?

P0443 indicates a problem with the Evaporative Emission (EVAP) Purge Solenoid Valve Control Circuit, which may prevent proper fuel vapor management.

What are the common symptoms of a P0443 code on a Pontiac?

Symptoms include the check engine light turning on, poor fuel economy, rough idling, or difficulty starting the vehicle.

What causes the P0443 code on a Pontiac?

Common causes include a faulty EVAP purge solenoid valve, damaged wiring or connectors, a blown fuse, or issues with the Powertrain Control Module (PCM).

How is the P0443 code diagnosed?

A mechanic will use an OBDII scanner to confirm the code, inspect the purge solenoid valve and its wiring, and test the circuit for proper voltage and continuity.

Can I drive my Pontiac with a P0443 code?

While the car may still be drivable, it's not recommended to ignore this code, as it may lead to increased emissions and potential damage to the EVAP system over time.

How do you fix the P0443 code on a Pontiac?

Repairs typically involve replacing the EVAP purge solenoid valve, repairing or replacing damaged wiring, or addressing PCM-related issues if necessary.

How much does it cost to fix a P0443 code on a Pontiac?

Repair costs vary but typically range from $100 to $300, depending on whether only the purge solenoid valve needs replacement or additional wiring repairs are required.

Can a loose gas cap cause a P0443 code on a Pontiac?

No, a loose gas cap is more likely to trigger a P0455 or P0457 code, not P0443, which is related specifically to the purge solenoid circuit.

How do I reset the P0443 code on my Pontiac after repairs?

Once repairs are complete, the code can be cleared using an OBDII scanner, or it may clear automatically after several drive cycles if the issue is resolved.

Does the P0443 code affect emissions testing on a Pontiac?

Yes, the P0443 code will likely cause your vehicle to fail an emissions test due to improper EVAP system operation.