Question about 2001 Cadillac DeVille

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Engine code po307 AND PO410 - 2001 Cadillac DeVille

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Hey; Code 307 is a code for misfire on cylinder #7. It could be caused by bad spark plug, ignition module. If engine has a miss then I would replace the spark plug first. If that don't fix then it will require further diagnosis with a scan tool. Code PO410 is for the secondary air injection system. Make sure the vacuum hoses going to the valves on the front and rear cylinder banks are connected and the hose(s) not damaged. Also make sure the solenoid is connected both electrical and vaccum' Maybe this will help

Posted on Sep 05, 2010

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Posted on Jan 02, 2017

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SOURCE: engine light came on, code po410 came up.

This has to do with the secondary air pump system, this system is used at cold start-up and involves three components; air pump, solenoid valve and a relay. Many times the valve becomes stuck or clogged, the relay has also been known to fail.

Posted on Oct 27, 2010

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What is error code po307


Code PO307 is Cylinder 7 misfire.

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code po410 on a 2004 gmc envoy is that there is a problem with the secondary air injection system, you will need to check the fuse located in the engine compartment first, the next step is to start the truck cold and listen for the air pump to turn on for a few seconds, this will sound like a jet engine but not that loud, after it runs for 5 min and you dont hear it then you may have a bad pump which is located under the driverside on frame but if you hear the pump then you may have a bad valve, this valve is located on the exhaust manifold area and has a hose from the pump to valve, remove the hose and check for water, drain any water in the hose, also remove hose at pump and drain, the most common cause for this code is the valve is not opening and the air pump gets water inside and goes bad, thats the po410 code. a quick note; if fuse is blown look under truck near pump and check relay as it fills with water and blows fuse, if this is the case replace relay and blow water out of connector.good day.

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I have a 00 cadillac deville base. i have a po410 check engine code. i was wondering what is the usually fix for this


Code po410 secondary air ignition malfunction

Start up your car cold, if you don't hear a sound like a vacuum cleaner running under your car you probably need a new air pump.
First, check the maxi-fuse in the underhood fuse block for the AIR pump.
If it's blown then you need to get under the car on the driver's side.
Remove the front cover and look at the bottom cover on the air pump, if it's dislodged and full of water the pump probably sucked up some water and is no longer good. There is a bulletin out to replace the air pump and the intake duct with a redesigned part that is not so suceptible to water intrusion. Also it's possible that the connector is burnt up, I have seen some with new air pumps set codes because of a fried electrical connection.thank you and have a wonderful day

Aug 22, 2011 | 2000 Cadillac DeVille

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Engine light came on, code po410 came up.


This has to do with the secondary air pump system, this system is used at cold start-up and involves three components; air pump, solenoid valve and a relay. Many times the valve becomes stuck or clogged, the relay has also been known to fail.

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What type of vehicle and if you have codes the book should tell you what those codes are. look them up and well go from there.

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