P0499 Cadillac Code - Evaporative Emission System Vent Valve Control Circuit High
Quick Answer
The Evaporative Emission (EVAP) Vent Solenoid Valve is located on the EVAP canister and is used to seal the canister vent. Common causes include Faulty Evaporative Emission Vent Solenoid Valve, Evaporative Emission Vent Solenoid Valve harness is open or shorted, Evaporative Emission Vent Solenoid Valve electrical circuit poor 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
- P0499 Cadillac indicates Evaporative Emission System Vent Valve Control Circuit High.
- Common causes
- Common causes include Faulty Evaporative Emission Vent Solenoid Valve, Evaporative Emission Vent Solenoid Valve harness is open or shorted, Evaporative Emission Vent Solenoid Valve electrical circuit poor 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.
Code P0499 Cadillac Description
What are the Possible Causes of the DTC P0499 Cadillac?
- Faulty Evaporative Emission Vent Solenoid Valve
- Evaporative Emission Vent Solenoid Valve harness is open or shorted
- Evaporative Emission Vent Solenoid Valve electrical circuit poor connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0499 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 P0499 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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Frequently Asked Questions about P0499 Cadillac Code
What does the OBDII code P0499 mean for a Cadillac?
P0499 indicates a problem with the evaporative emission system vent valve control circuit, specifically a high voltage issue.
What are the common symptoms of code P0499 in a Cadillac?
Symptoms may include an illuminated check engine light, difficulty refueling, or a faint fuel odor.
What causes the P0499 code to appear on a Cadillac?
Common causes include a faulty vent valve, wiring issues, or corrosion in the electrical connectors.
Can I drive my Cadillac with the P0499 code active?
You can drive with this code, but it’s best to address it promptly to avoid potential emissions issues or inspection failures.
How do I diagnose the P0499 code on a Cadillac?
Check the vent valve for proper function, inspect wiring and connectors for damage or corrosion, and use a multimeter to test circuit voltage.
How do I fix the P0499 code on a Cadillac?
Repairs typically involve replacing the vent valve, repairing damaged wiring, or cleaning corroded connectors.
Where is the vent valve located on a Cadillac?
The vent valve is typically located near the fuel tank or charcoal canister, depending on the model.
What tools do I need to fix the P0499 code?
You may need a multimeter, basic hand tools, and possibly an OBDII scanner to clear the code after repairs.
Will the P0499 code affect my Cadillac’s performance?
This code generally doesn’t impact performance but can lead to increased emissions and potential inspection failures.
How much does it cost to fix the P0499 code on a Cadillac?
Repair costs can range from $100 to $300, depending on whether parts like the vent valve need replacement.
Discuss the causes and fixes for P0499 Cadillac OBDII Code
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