When you’re having trouble with your Dodge and the code P0499 pops up, it’s important to know what it means and what could be causing the issue. This code stands for “NVLD Canister Vent Solenoid Circuit High,” and it’s a fault in the natural vacuum leak detection circuit. The PCM, or powertrain control module, detected an open or high voltage condition on the circuit. There are a few different causes that could be the culprit of this issue, such as the NVLD canister vent solenoid control circuit being open or shorted to power, the NVLD canister vent solenoid ground circuit being open, the NVLD canister vent solenoid being damaged or having failed, or even the PCM having failed. To help you address this issue, I have created a table below that outlines potential causes and solutions for the Dodge code P0499.
NVLD Canister Vent Solenoid Control Circuit
The NVLD canister vent solenoid control circuit is the most common cause of code P0499 in Dodge vehicles. This is because it’s responsible for controlling the flow of air through the NVLD canister. If the circuit is open or shorted to power, then the flow of air will be disrupted and the PCM will detect this. The solution is to check the circuit for any signs of damage or corrosion and then repair or replace the circuit as needed.
NVLD Canister Vent Solenoid Ground Circuit
The NVLD canister vent solenoid ground circuit is also a potential cause for code P0499 in Dodge vehicles. This circuit controls the ground for the NVLD canister vent solenoid. If the circuit is open, then the ground for the solenoid will be disrupted and the PCM will detect this. The solution is to check the circuit for any signs of damage or corrosion and then repair or replace the circuit as needed.
NVLD Canister Vent Solenoid
The NVLD canister vent solenoid is another potential cause for code P0499 in Dodge vehicles. This is because the vent solenoid is responsible for controlling the flow of air through the NVLD canister. If the solenoid is damaged or has failed, then the flow of air will be disrupted and the PCM will detect this. The solution is to check the solenoid for any signs of damage or corrosion and then repair or replace the solenoid as needed.
PCM Failure
Lastly, the PCM itself could be the culprit of code P0499 in Dodge vehicles. This is because the PCM is responsible for controlling the flow of air through the NVLD canister. If the PCM has failed, then the flow of air will be disrupted and the PCM will detect this. The solution is to replace the PCM with a new one.
Conclusion
When your Dodge is displaying code P0499, it’s important to take the necessary steps to diagnose and repair the issue. The most common causes of this code are the NVLD canister vent solenoid control circuit, the NVLD canister vent solenoid ground circuit, the NVLD canister vent solenoid, and the PCM. To address these issues, it’s necessary to check the circuits and solenoid for any signs of damage or corrosion and then repair or replace them as needed. If all else fails, then you may need to replace the PCM itself. If you need help diagnosing and repairing Dodge Code P0499, then a certified mechanic can help you resolve the issue.
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