Secondary Air Injection code lights up. The shop tries to change a solenoid but it didn't help. What should be done? can the pump be serviced?

 

There are several codes for SAI, what numbers were found? If you need to, most parts stores will read codes for free. Pumps usually make a hair dryer scream leading up to failure. Mostly just replaced.

 

I'll get the codes from the shop. Noise - yes, only first time in the morning for about 1 minute.

 

Hi, the code is P0413. It is there all the time. The pump is not working. Giving it an electric current makes it going and the light comes off for a few minutes. Then it shows again.
what to do? Replace the pump?

 

P0413 SAI vacuum solenoid valve not connected, open circuit

I'd be looking at connector or wire harness issues. The valve gets + battery volts on the brown with pink wire, when key is switched on, along with lots of other things. The ground is supplied by the ECU when it wants to operate the valve (start up, and other times) on the black with blue wire. Since the valve is an electric coil inside, the ECU can "sense" if you have unplugged the emission system.

So at connector C0880 you should have 12 volts across it when valve should be operated. 12 volts from brown&pink to ground whenever key is in position 2. You could have a broken wire at connector or in harness.

Pix and connector location attached.

 

Look at the vacuum valves above each side of the manifold.
A little vacuum hose plugs into each.

There is also a vacuum reservoir on the driver's side which must be connected.

Two hoses go into it as I recall.

 

I know that the SAI system runs performance tests periodically, I don't know if it "infers" that the solenoid valve is unplugged from the cable, or if it actually sends a supervisory current thru it. Obviously, if ECU "exercises" the valve, and looks for a change; a cracked vac line could "fool" the ECU. A good point Dr. jfall.

 

As far as those vacuum valves, is there a way to clean or lub them up? I took both of mine off and they had some carbon built up and don't open as easier as I think they should. I keep getting codes P1412/P1415 or P1414/P1417. I changed the SAI pump and wonder how long it's gonna last before it stops working because the valves aren't opening as they should.