Persistent 5-4-1 Evap-valve signal
#1
07-10-2010, 10:58 AM
Persistent 5-4-1 Evap-valve signal
Hello again,
I have a problem to which hopefully someone on the forum can provide some guidance.
On my '96 850 NA, there is a persistent Evap-valve code 5-4-1.
As soon as the code is cleared and the ignition is turned on, the check engine light immediately lights up and this 5-4-1 is stored.
The connector to the valve appears to be intact with no insulation cracks or loose areas and the contacts on the connector and valve have been sprayed with electrical cleaner. When that did not work, I figured the valve was faulty and a used one was purchased from ebay. The used valve was installed and that too failed to resolve the problem.
I should have check the old valve closer before buying another but did not. That said, the resistance of the old and used valves are equal at about 26 Ohms. A 12 v current across either of these valves will open it and the vacuum to the intake manifold can be felt so the assumption is the valves are functional.
Thinking that the valve check occuring at ignition on may create a momentary 12 volts to test continuity of the circuit, a volt meter was placed across the connectors but this failed to detect any voltage.
At this point I am at a loss where to check next. Could there be a faulty relay somewhere? Any and all thoughts are welcomed. Thanks for reading.
I have a problem to which hopefully someone on the forum can provide some guidance.
On my '96 850 NA, there is a persistent Evap-valve code 5-4-1.
As soon as the code is cleared and the ignition is turned on, the check engine light immediately lights up and this 5-4-1 is stored.
The connector to the valve appears to be intact with no insulation cracks or loose areas and the contacts on the connector and valve have been sprayed with electrical cleaner. When that did not work, I figured the valve was faulty and a used one was purchased from ebay. The used valve was installed and that too failed to resolve the problem.
I should have check the old valve closer before buying another but did not. That said, the resistance of the old and used valves are equal at about 26 Ohms. A 12 v current across either of these valves will open it and the vacuum to the intake manifold can be felt so the assumption is the valves are functional.
Thinking that the valve check occuring at ignition on may create a momentary 12 volts to test continuity of the circuit, a volt meter was placed across the connectors but this failed to detect any voltage.
At this point I am at a loss where to check next. Could there be a faulty relay somewhere? Any and all thoughts are welcomed. Thanks for reading.
Thread
Thread Starter
Forum
Replies
Last Post
