P1449 Diagnostic Module Tank Leakage Pump Too High

• OBD2 Code: P1449
• Description: Diagnostic Module Tank Leakage Pump Too High
• Definition: This code indicates that the diagnostic module for tank leakage has detected a pump pressure that is too high, which may suggest an issue with the fuel system’s evaporative emissions control.

p1449 – Diagnostic Module Tank Leakage Pump Too High

Typical Severity: Moderate

Common Causes

p1449 – Diagnostic Module Tank Leakage Pump Too High

Common Causes:

• Faulty tank leakage pump
• Blocked or kinked hoses in the evaporative emission control system
• Leak in the fuel vapor system
• Malfunctioning purge valve
• Issues with the EVAP canister or vent valve

 

Common Misdiagnosis

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• OBD2 Code: P1449
  
  Description: Diagnostic Module Tank Leakage Pump Too High
  
  Common Misdiagnosis: Replacing the fuel cap or EVAP canister without checking for actual leaks in the system.

 

Common Diagnostic Steps

OBD2 Code: P1449

Description: Diagnostic Module Tank Leakage Pump Too High

Common Diagnostic Steps:

• Verify the code using an OBD2 scanner and clear it to see if it returns.
• Inspect the fuel tank, lines, and connections for any visible leaks or damage.
• Check the operation of the diagnostic module tank leakage pump for proper function.
• Examine the electrical connections and wiring related to the pump for corrosion or disconnection.
• Test the pressure sensor associated with the system to ensure accurate readings.
• If applicable, inspect and test any related valves or solenoids in the evaporative emission control system.
• Consult vehicle-specific repair manuals for further troubleshooting steps if necessary.