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P0441

Read the instructions below then start the fault diagnostic procedure.

Symptom: CHECK ENGINE.

P0441


EVAP Purge Valve. Malfunction.


Fault symptoms


• CHECK ENGINE.


On-Board Diagnostics

Type of diagnosis:


- Once per driving cycle. It is interrupted once fault criteria have been fulfilled or OK has been reported. Restarts next driving cycle.


Enable criteria: (Conditions that must be fulfilled for diagnostics to be performed.)


- Global conditions for this diagnostic trouble code: When starting the engine, the atmospheric pressure must exceed 78 kPa and the temperature of the coolant and the intake air must exceed -7°C.

- Test 1: Coolant temperature on starting lower than 40°C. Purge active. Idling. Maximum one change in status of the brake light switch. Purge adaptation higher than -7 %. Intake air pressure at least 20 kPa lower than atmospheric pressure. Car stationary for 5s.

The diagnosis will commence once the above criteria have been fulfilled. If the diagnosis is interrupted, vehicle speed will have to exceed 0 on one occasion before the diagnosis is allowed to restart. The diagnosis then proceeds as follows: The shut-off valve is activated at the same time as the purge is interrupted for 3.5s. Meanwhile, the tank pressure is monitored.

- Test 2: Coolant temperature on starting above 40°C or Test 1 indicated a leak. Approved transition diagnosis for oxygen sensor 1. Purge active. Idling. Maximum one change in status of the brake light switch. Purge adaptation higher than -6 %. Intake air pressure at least 20 kPa lower than atmospheric pressure. Car stationary for 5s.

The diagnosis will commence once the above criteria have been fulfilled. If the diagnosis is interrupted, vehicle speed will have to exceed 0 on one occasion before the diagnosis is allowed to restart. The diagnosis then proceeds as follows: The shut-off valve is activated at the same time as the purge is interrupted for 3.5s. Meanwhile, the tank pressure is monitored.




Fault criteria: (When enable criteria have been fulfilled, diagnostics will check if the fault criteria have been fulfilled.)


- Tests 1 and 2: If the pressure drops by more than 0.25 kPa, an internal leak has been detected in the evap canister purge valve.

- DTC P0441 is generated when fault criteria have been fulfilled during both Test 1 and Test 2 within the same driving cycle and dependents are OK.


Dependents: (Once fault criteria have been fulfilled, a number of other diagnostics must report OK before the diagnostic trouble code can finally be generated.)


- P0444, P0445, P0501, P0502, P0506, P0507, P1444, P1445, P1576 and P1577.


System reaction to a fault: (Once the fault criteria have been fulfilled, certain measures will sometimes be taken.)


- None.


OK report: (This diagnosis may be included as a dependent to another diagnosis and must therefore report OK even if it is continuous. The OK report is also used in fault handling to count down the fault counter.)


- Test 1 or Test 2 performed once and fault criteria not fulfilled.


Fault handling: (Refer to section “Fault diagnosis, general” for more information.)


- Type III.


Diagnostic help

Fault diagnosis concerns a fault in the valve.

Diagnostic tool functions related to this fault:


• Diagnostic status for the diagnosis.

• Activation of EVAP diagnostics.


Refer also to the description of readings under ”Fault diagnosis, general” for more information

Note

For a diagnostic trouble code to be generated, first Test 1 and then Test 2 must indicate a leak during the same driving cycle. To achieve this, the coolant temperature on starting the engine must be below 40°C (104°F). Consequently, the diagnostic trouble code cannot be generated if the engine is started while still warm.

As a final check of the rectified fault, the diagnostic tool activation command can be used to initiate Test 1 irrespective of the starting temperature.