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Old 06-28-2014, 06:24 PM   #1
travisj027
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2002 SC1
Attention Check Engine Light - Code P0410

Hello,

My 2002 Saturn SC1 check engine light has been on and I went to Autozone to get it read so I could get a code. The code was P0410 described as a secondary air injection system fault. I printed off the code sheet for a list of possible causes.

Possible Causes:
1. Circuit relay defective or fuse
2. Check connector and wiring
3. Air pump defective or hoses blocked

This is the third time I have gotten the car scanned. The second time I was recommended to try Sea Foam and run it through the throttle body. The light didn't go off.

But it's weird because the light will stay on for a few weeks then go off for about a week. Then come back on again. Recently I reset my battery and it came back on in a 150 miles then it cut back off again and didn't come back on for another 230 miles.

This most recent time I went to Autozone and got it scanned the guy seemed like he was pretty new and wasn't sure how to work the scanner. He ended up pressing the red button and I think he cleared the code out and my light has been off ever since.

Either way the light goes on and off and now I'm not sure whether it will come back on or not since he cleared the code out. Any insight on my issue will be greatly appreciated!

Thanks!

-Trav
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Old 06-28-2014, 07:57 PM   #2
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2001 SL2
Default Re: Check Engine Light - Code P0410

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Service Information Home Publications Number Search New Bulletins Bulletin Search Feedback Help


2002 Saturn SL1/SC1 | SL, SL1, SC1, SW1, SL2, SC2, SW2 VIN Z Service Manual | Document ID: 882599
--------------------------------------------------------------------------------

DTC P0410

Object ID: 870996Click here for detailed picture of the image.

The secondary air injection (AIR) system is used to accelerate the heating process of the catalytic converters by introducing outside air into the exhaust manifold. The air pump operates on cold engine starts when the catalytic converters are least efficient. The AIR system consists of the air pump, combination valve, air pipe/hoses, check valve, air pump solenoid, air pump relay and powertrain control module (PCM). The PCM controls the ground for the air pump relay coil, which turns the air pump ON and OFF. The PCM also controls the ground for the air pump solenoid, which allows manifold vacuum to move the combination valve. The air pump solenoid and air pump relay are controlled independently to prevent exhaust gas from entering the air pump. During air pump operation, the oxygen sensor 1 (O2S-1) should read lean indicating the air pump system is working. DTC P0410 sets when the PCM commands the AIR system ON and the O2S-1 signal does not indicate a lean condition for a certain length of time.

DTC Parameters
DTC P0410 will set if AIR system is being commanded ON during a cold start and O2S-1 signal does not indicate a lean condition (voltage greater than 300 mV) for a minimum of 2.5 seconds out of a 10 second test when the following parameters are met for at least 6 seconds while the test is running.

•The engine speed is less than 3200 RPM.
•The startup engine coolant temperature (ECT) is between 4–79°C (39–174°F).
•The O2S-1 is above 600 mV for at least 2 seconds.
•The intake air temperature (IAT) is greater than 0°C (32°F).
•The manifold absolute pressure (MAP) is greater than 20 kPa.
•The ignition voltage is between 11–18 volts.
•The traction control is not active.
•The commanded air/fuel ratio is between 12:1 and 14:1.
•The calculated air flow is between 8–19 gm/s.
•No 5-volt reference, ECT, EGR, fuel trim, idle air control (IAC), IAT, MAP, misfire, O2S-1 or throttle position (TP) sensor DTCs have been set.
The following applies to vehicles built after VIN 1Z200000. If the air pump does not run long enough to obtain accurate test results, the PCM may run up to 5 independent tests if a test fails or does not fully run. The PCM must see the O2S-1 voltage go below 300 mV for at least 1.5 seconds out of a maximum 6 second test. The PCM will wait 20 seconds between each test if another test is going to run.

Conditions to run the active test:

•The ECT is greater than 75°C (167°F).
•The commanded air/fuel ratio is 14.7:1.
•The engine is at idle for at least 4 seconds.
•STFT is between 122–134.
DTC P0410 is a type B DTC.

Diagnostic Aids
Important: If DTC P0413, P0414, P0418 or P1418 (air pump solenoid or air pump relay DTC) is set, diagnose that DTC first. That DTC is most likely the cause of the AIR system not working and should be diagnosed first.

Important: Vehicles built after VIN 1Z200000 are equipped with an internal air pump thermal switch. The switch may open as long as five minutes if the air pump becomes too hot. Wait at least 5 minutes with the ignition OFF before running the AIR PUMP SERVICE BAY TEST.

To locate an intermittent problem, use a scan tool to run the AIR PUMP SERVICE BAY TEST. The engine should be at idle, and loop status should be closed. The PCM will run DTC P0410 when all DTC parameters have been met. The test will run for 30 seconds and DTC P0410 will fail if a fault occurred.

Refer to Secondary Air Injection System Description for a further AIR system description.

The air pump resistance is 0.5–10 ohms.

Object ID: 875737Click here for detailed picture of the image.
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Old 06-28-2014, 08:11 PM   #3
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2002 SL2
Default Re: Check Engine Light - Code P0410

If cleaning carbon out of the exhaust passages does not work,
replace the diverter valve,

Part number 21210000
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Old 06-29-2014, 02:29 AM   #4
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2002 SC1
Default Re: Check Engine Light - Code P0410

satlite440 - Thanks for the help! But can you translate that for me? lol

mattwithcats - Is that the next common issue? Or should I try running more Sea Foam through the exhaust? Also is that for rockauto & saturn parts? Thanks!
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Old 06-29-2014, 04:08 AM   #5
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2002 SL2
Default Re: Check Engine Light - Code P0410

Richpin's video on how to troubleshoot.

http://youtu.be/dIrmkxj6wJE

The diverter valve us known to go bad.
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Old 06-29-2014, 11:38 AM   #6
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2002 SC1
Default Re: Check Engine Light - Code P0410

Quote:
Originally Posted by mattwithcats View Post
Richpin's video on how to troubleshoot.

http://youtu.be/dIrmkxj6wJE

The diverter valve us known to go bad.
Thanks Matt! Much appreciated for the link. I watched the video seems it could be a number of problems, hopefully in my case that would be the issue. Would that also cause the SES to go on and off from time to time?
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Old 06-30-2014, 08:46 AM   #7
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2002 SC1
Default Re: Check Engine Light - Code P0410

When the SES comes and goes with the P0410 code, that suggests likely partial blockage of the air injection passages. My '02 does this from time to time. As it gets worse, the light is on more often than not. I've pulled the exhaust manifold twice during my 8 years of ownership to get the crud out of the air passages through the head. On an SOHC engine, this is easy. On the DOHC, it is a bit more of a challenge because of the shape of the passages.

Take the silver tube between the diverter valve and the exhaust manifold off and do a cold start. If air pours out of the diverter valve for 30 seconds or so, the air pump, diverter valve and solenoid vacuum valve are all working. Then, using something other than your hand, check for exhaust flow out of the open hole in the manifold. If very little exhaust comes out of the hole, the air passages are plugged.

Some lucky souls find that the silver tube is plugged, and cleaning it out restores secondary air system performance.
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Old 06-30-2014, 12:19 PM   #8
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2002 SL2
Default Re: Check Engine Light - Code P0410

I recently had this code (PO410). On mine, the silver tube between the diverter and the manifold was plugged. I removed the tube and cleaned it out with brake cleaner.
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Old 07-08-2014, 11:31 AM   #9
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2002 SC1
Default Re: Check Engine Light - Code P0410

Quote:
Originally Posted by BV22 View Post
When the SES comes and goes with the P0410 code, that suggests likely partial blockage of the air injection passages. My '02 does this from time to time. As it gets worse, the light is on more often than not. I've pulled the exhaust manifold twice during my 8 years of ownership to get the crud out of the air passages through the head. On an SOHC engine, this is easy. On the DOHC, it is a bit more of a challenge because of the shape of the passages.

Take the silver tube between the diverter valve and the exhaust manifold off and do a cold start. If air pours out of the diverter valve for 30 seconds or so, the air pump, diverter valve and solenoid vacuum valve are all working. Then, using something other than your hand, check for exhaust flow out of the open hole in the manifold. If very little exhaust comes out of the hole, the air passages are plugged.

Some lucky souls find that the silver tube is plugged, and cleaning it out restores secondary air system performance.
Thank you for the advice! Question - how do I do a cold start? & what would you recommend using other than my hand to check for exhaust flow? Thanks!
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Old 07-08-2014, 12:09 PM   #10
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2002 SC1
Default Re: Check Engine Light - Code P0410

By cold start, I simply mean start the car with the engine completely cooled off (i.e. first start of the day). When the engine is started when already warmed up, the air pump does not run.

As for checking the exhaust flow out the open hole in the manifold (silver tube removed), the exhaust is quite hot and can burn you. If you rev the engine, you can probably see the exhaust. Otherwise, use a strip of paper or something similar that will flap in a breeze.
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Old 07-08-2014, 12:32 PM   #11
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2002 SC1
Default Re: Check Engine Light - Code P0410

Quote:
Originally Posted by quickster View Post
I recently had this code (PO410). On mine, the silver tube between the diverter and the manifold was plugged. I removed the tube and cleaned it out with brake cleaner.
Thanks for the help! I will try what you did and see what happens. But my SES went off again yesterday! So idk what's going on.
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Old 07-08-2014, 12:33 PM   #12
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2002 SC1
Default Re: Check Engine Light - Code P0410

Quote:
Originally Posted by BV22 View Post
By cold start, I simply mean start the car with the engine completely cooled off (i.e. first start of the day). When the engine is started when already warmed up, the air pump does not run.

As for checking the exhaust flow out the open hole in the manifold (silver tube removed), the exhaust is quite hot and can burn you. If you rev the engine, you can probably see the exhaust. Otherwise, use a strip of paper or something similar that will flap in a breeze.
Okay cool. Sounds good! Thanks!
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Old 07-08-2014, 06:07 PM   #13
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2002 SC1
Default Re: Check Engine Light - Code P0410

I'm going to work on the car in the morning. Before I do so, is that metal rod the one I circled in the photo? Thanks!
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Old 07-08-2014, 10:13 PM   #14
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2002 SL2
Default Re: Check Engine Light - Code P0410

Quote:
Originally Posted by travisj027 View Post
is that metal rod the one I circled in the photo?
Yes

FWIW, mine was relatively clean. Mine was resolved by purchasing a new diverter valve, as mentioned by an earlier poster.
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Old 07-09-2014, 08:07 AM   #15
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Default Re: Check Engine Light - Code P0410

Quote:
Originally Posted by TXSaturn02 View Post
Yes

FWIW, mine was relatively clean. Mine was resolved by purchasing a new diverter valve, as mentioned by an earlier poster.
Mine was pretty clogged up with carbon. When I ran the cold start test air was flowing from the diverter valve and there was air flowing form the exhaust manifold but it wasn't blowing as hard.
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Old 07-09-2014, 08:33 AM   #16
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2002 SC1
Default Re: Check Engine Light - Code P0410

Sometimes, cleaning out that tube is all that is needed. I've not been so lucky, and twice have removed the exhaust manifold to clean out the crud in the air passages. I'd suggest putting it back together and driving a while to see what happens. You have successfully verified that all the mechanical and electrical portions of the secondary air injection system work. This means the injected air was not reaching the exhaust stream in sufficient quantity to pass the self-test. With the tube cleaned out, you may be good to go. If the code comes back, you can either live with it (running the car with this code active is harmless) or remove the manifold for a good clean out.
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Old 07-09-2014, 04:58 PM   #17
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Default Re: Check Engine Light - Code P0410

Does this effect mpg in any way?

I have the 0410 code . I watch rich pin video. I have no voltage at the pump period. I checked the relay it is good.
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Old 07-09-2014, 05:06 PM   #18
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2002 SL2
Default Re: Check Engine Light - Code P0410

Quote:
Originally Posted by Scwrocks View Post
Does this effect mpg in any way?
Not for me.
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Old 07-10-2014, 10:23 AM   #19
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2002 SC1
Default Re: Check Engine Light - Code P0410

Quote:
Originally Posted by BV22 View Post
Sometimes, cleaning out that tube is all that is needed. I've not been so lucky, and twice have removed the exhaust manifold to clean out the crud in the air passages. I'd suggest putting it back together and driving a while to see what happens. You have successfully verified that all the mechanical and electrical portions of the secondary air injection system work. This means the injected air was not reaching the exhaust stream in sufficient quantity to pass the self-test. With the tube cleaned out, you may be good to go. If the code comes back, you can either live with it (running the car with this code active is harmless) or remove the manifold for a good clean out.
Well as soon as I cleaned it out I changed my odometer to 0 and this morning the SES went off again. It was at 67 miles. So I reset it again and we will see whether it comes on or not.

I will still take it apart again and clean it out with some break cleaner. Will it hurt to spray some break cleaner in the manifold and diverter valve? Or just worry about the metal rod that connects the 2?
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Old 07-10-2014, 12:24 PM   #20
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2002 SC1
Default Re: Check Engine Light - Code P0410

I wouldn't spray anything into the diverter valve. Focus on the silver tube first and get it clean. Attempts to clean out the manifold and head passages from the outside tend to be futile.
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