This is one of the most frequent OBD2 trouble codes. Read the full article below to know what it means, how to fix it, and what other codes may show related to it.
Definition
P1441 is an OBD-II Code that refers to EVAP System Flow During Non-Purge Condition
Meaning
A P1441 code is a manufacturer specific diagnostic trouble code related to Buick, Cadillac, Chevrolet, Dodge, GM, Isuzu, Pontiac, Saturn vehicles that occurs when the PCM/ECM detects unwanted flow of fuel vapors through the EVAP System. The purge solenoid valve is responsible for controlling the flow of vapors from the EVAP System, and if it fails to close when it should, fuel vapors will escape.
The P1441 code will be set when the PCM/ECM determines that the purge solenoid valve is not closing as it should.
Causes
Common causes for this code include:
- The purge control valve is faulty
- Wiring and/or connectors that are damaged, burnt, shorted, disconnected, or corroded
- Charcoal canister is defective
- Vacuum lines are leaking
- Fuel filler cap that leaks
Symptoms
The symptoms of a P1441 code are:
- Illuminated Check Engine Light
- Engine power loss
- Rough idling
- Acceleration that is difficult to control
- It's difficult to start the engine if it's hot
Diagnosis
To diagnose a P1441 DTC code, a technician would:
- Scan for codes in the ECM and look at the freeze frame data for failure.
- Visually inspect the EVAP system for leaks.
- Check the wiring and connectors for damage, and test the purge solenoid valve for proper operation.
- Check the vacuum lines for leaks.
- Check the fuel filler cap for a proper seal.
Common mistakes
The following are some of the most common mistakes that a technician may make when diagnosing a P1441 code:
- Not thoroughly inspecting all the wiring and connectors for damage.
- Not checking the vacuum lines for leaks.
- Not checking the fuel filler cap for a proper seal.
How serious is this?
A P1441 code is a serious code, and should be fixed as soon as possible. If the code is not repaired, it could cause unexpected engine problems.
What repairs can fix the code?
The following are solutions that may fix this problem:
- Repair or replace any wiring that is damaged
- Replace any connectors that are damaged
- Replace the purge control valve
- Clean or replace the charcoal canister
- Repair any vacuum leaks
- Repair any fuel filler cap leaks.
Related codes
A P1441 is related to and may be accompanied by the following codes:
P0442 – EVAP System Leak Detected (small leak)
P0455 – EVAP System Leak Detected (large leak)
P1440 – EVAP Control System Malfunction.
Conclusion
In conclusion, the P1441 code is a diagnostic trouble code that refers to a problem with the EVAP System. The code is set when the PCM/ECM detects unwanted fuel vapors escaping from the system. There are several possible causes for this code, and it should be repaired as soon as possible to avoid further engine problems. Some of the possible repairs include repairing or replacing any damaged wiring or connectors, replacing the purge