Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with a part of the car that checks for leaks in the fuel system. It's like if you had a balloon with a tiny hole, and the pump that checks for that hole isn't working right.
The P1436 code indicates a malfunction in the control circuit of the leakage diagnostic pump, which is responsible for checking the fuel system for leaks.
The Leakage Diagnostic Pump is part of the vehicle's evaporative emission control system (EVAP). It pressurizes the fuel system to check for leaks. An open circuit or fault in the control circuit means the pump isn't receiving the correct signals to operate.
• Check Engine Light is on
• Failed emissions test
• Possible fuel smell from the vehicle
• Faulty leakage diagnostic pump
• Open or shorted wiring in the pump circuit
• Poor electrical connection at the pump
EVAP: Evaporative Emission Control System, which prevents fuel vapors from escaping into the atmosphere.
OBD-II: On-Board Diagnostics II, a standardized system for vehicle self-diagnosis and reporting.
• Use an OBD-II scanner to confirm the P1436 code.
• Inspect the wiring and connections to the leakage diagnostic pump.
• Test the leakage diagnostic pump for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the leakage diagnostic pump if faulty.
• Clear the code and test drive to see if it returns.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Toyota Camry
• Honda Accord
• Ford F-150
• Regularly inspect and maintain the EVAP system.
• Ensure all gas caps are tightly sealed.
• Check for and repair any fuel system leaks promptly.
EVAP System Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional if you're not comfortable with DIY repairs.
Check with your vehicle manufacturer for warranty coverage on emission-related components.
This code has been associated with vehicles that have aging EVAP systems, often appearing in older models.
Moderate – While not immediately dangerous, it should be addressed to ensure proper vehicle operation and emissions compliance.
Operating a vehicle with a malfunctioning EVAP system may cause increased emissions and could fail emissions testing.
• Vehicle must be running.
• Fuel tank should be between 1/4 and 3/4 full.
The leakage diagnostic pump is typically located near the fuel tank or within the EVAP canister assembly.
Q: What happens if I ignore the P1436 code?
A: Ignoring this code can lead to increased emissions and potential fuel system issues.
Q: Can I drive with a P1436 code?
A: Yes, but it's recommended to fix the issue to avoid emissions problems and potential damage.
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A wired color-screen reader with readiness hotkeys, live data, code definitions, and data logging.
Good for emissions-related codes because it exposes readiness monitors and live powertrain data.
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Specialty · Smoke machine
Helpful for finding EVAP and vacuum leaks that are hard to see with visual inspection alone.
Helpful for tracking down EVAP and vacuum leaks that can trigger emissions faults.
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Specialty · O2 sensor socket
Helpful when the code points toward exhaust or oxygen-sensor work and space is tight.
Useful when the diagnosis points toward oxygen-sensor removal or replacement.
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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.