Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This means that the car's system that checks for gas leaks isn't working properly. It's like having a balloon with a tiny hole, but the tool that finds the hole isn't working.
The code indicates an issue with the EVAP system's leak detection pump, which is not performing as expected or is stuck in the off position.
The EVAP (Evaporative Emission Control) system prevents fuel vapors from escaping into the atmosphere. The leak detection pump is responsible for testing the system for leaks. Code P2DDA is triggered when the pump does not operate as intended, possibly due to being stuck or a performance issue.
• Check Engine Light is on
• Noticeable fuel odor
• Possible decrease in fuel efficiency
• Faulty leak detection pump
• Electrical issues such as damaged wiring or connectors
• Faulty EVAP system pressure sensor
EVAP: Evaporative Emission Control
OBD-II: On-Board Diagnostics, Second Generation
• Use a scan tool to verify the code and check for additional codes.
• Inspect the leak detection pump and its wiring for damage.
• Test the pump for proper operation.
• Replace the leak detection pump if faulty.
• Repair or replace damaged wiring or connectors.
• Replace the EVAP system pressure sensor if necessary.
• OBD-II scan tool
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Dodge Charger
• Jeep Grand Cherokee
• Chrysler 300
• Regularly inspect the EVAP system components.
• Ensure proper sealing of the fuel cap.
• Perform regular vehicle maintenance checks.
EVAP System Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional if unsure.
• Avoid overfilling the fuel tank.
Check with the vehicle manufacturer for warranty coverage on emission-related components.
This code has been observed in vehicles with aging EVAP systems or those exposed to harsh environmental conditions.
Moderate – While not immediately critical, it should be addressed to prevent emissions and potential fuel efficiency issues.
Driving with a malfunctioning EVAP system may result in increased emissions, which could be against local environmental regulations.
• Vehicle must be at operating temperature.
• EVAP system test initiated by the vehicle's onboard diagnostics.
The leak detection pump is typically located near the fuel tank or within the EVAP canister assembly.
Q: Can I drive with a P2DDA code?
A: Yes, but it's best to get it checked soon to avoid emissions issues.
Q: Will the Check Engine Light turn off after repair?
A: Yes, once the issue is fixed and the code is cleared, the light should turn off.
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Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
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Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
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Fitment Required · Vehicle-fitment part
Relevant when EVAP diagnosis points toward purge-flow or purge-control faults.
EVAP diagnosis often includes purge-flow and valve-control faults.
Confirm the failed valve and exact fitment before buying parts.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.