{"id":347,"date":"2017-01-28T02:14:21","date_gmt":"2017-01-28T02:14:21","guid":{"rendered":"http:\/\/gerdhoeren.me\/WordPress\/?page_id=347"},"modified":"2019-09-17T08:32:04","modified_gmt":"2019-09-17T16:32:04","slug":"check-engine-error-p0410","status":"publish","type":"page","link":"http:\/\/gerdhoeren.me\/WordPress\/mercedes-slk-230\/check-engine-error-p0410\/","title":{"rendered":"Check Engine Error P0410"},"content":{"rendered":"

2002 Mercedes SLK 230<\/big><\/big>
\n(R170 Chassis)<\/p>\n

At 40,000 miles, my Check Engine light came on — sad.\u00a0 The error code was P0410: Secondary Air Injection System Fault.\u00a0 Secondary air warms up the catalytic converter by diverting air from the kompressor.\u00a0 This happens for the first 150 seconds of cold engine operation.\u00a0\u00a0<\/b>(Other cars have a separate air pump.)<\/b><\/p>\n

In my case, it was caused by a defective check valve (002-140-68-60), which was rusted shut.\u00a0 This valve keeps a backfire from reaching upstream to the air valve (002-140-55-60) or other components.<\/strong><\/p>\n

I found a web picture showing the location of this valve on a 1998 SLK, but it’s in a different place in my 2002 SLK.<\/strong><\/p>\n

\"002-140-68-60
002-140-68-60 Check Valve. Cause of my P0410 Check Engine Code.<\/figcaption><\/figure>\n
<\/div>\n

Replacement<\/big>: It was a nasty problem getting the old valve out.\u00a0 It’s threaded into a stainless steel pipe and has a 27mm nut on the bottom.\u00a0 The problem is that 40,000 miles of heating and cooling from the exhaust has baked the two components together.\u00a0 What’s worse, the 27mm nut requires an\u00a0extra thin\u00a0open-end wrench, which I couldn’t find.\u00a0 I ended up sawing the old valve vertically down to the nut and peeling it apart with vice grips.\u00a0 Then, I could unscrew it with a 1 1\/16 inch socket from the top.\u00a0 Screwing the new valve on was easy.<\/b><\/p>\n

P0410 Again:<\/u><\/big>\u00a0I got the P0410 error code again at 65,000 miles.\u00a0 This time, I found the correct (thin) wrench at\u00a0Hall Tool Company<\/a>\u00a0in Portland.\u00a0 It’s a 1 1\/16 inch Thin Pattern Pump wrench from Armstrong (28-034).\u00a0 It was nice of the guy at the tool company to write “27” on it, so that it would feel welcome under the hood of my SLK.\u00a0 This wrench is only 7 inches long, 1\/4 inch thick and fits into this tight spot.\u00a0 I used a pry-bar against the transmission housing to apply enough force to loosen the valve.<\/b><\/p>\n

\"Armstrong
Armstrong 28-034 27mm wrench for removing Mercedes 002-140-68-60 Check Valve<\/figcaption><\/figure>\n
\n

After only 25,000 miles, the check value was not rusted shut.\u00a0 I installed the new one, but error code came back after 2000 miles.\u00a0 I removed the intake hose from the air valve (<\/b>002-140-55-60), started the engine and noticed that there was almost no air coming out of hose.\u00a0 It was time to take the car to Mercedes.<\/b><\/p>\n

The dealer (sadly) started by cleaning out the stainless steel pipe at the exhaust manifold connection (“moderate carbon build-up”) and replacing the pre-cat O2 sensor.\u00a0 That didn’t fix it.\u00a0 On the second try, they replaced the 111-098-00-50 Recirculating Air Flap, which fixed the problem.\u00a0 It’s located at the air filter housing:<\/strong><\/p>\n<\/div>\n

\"Mercedes
Mercedes 111-098-00-50 Recirculating Air Flap – cause of my P0410 Check Engine Code<\/figcaption><\/figure>\n

Here is what my old part looks like — same as the throttle body on the intake manifold.<\/strong><\/p>\n

\"Mercedes
Mercedes 111-098-00-50 Recirculating Air Flap<\/figcaption><\/figure>\n

The replacement of this part has fixed the problem. It also restored the full power of my engine. Let me know if this part caused a similar problem on your SLK.
\n<\/b><\/p>\n

Updated: January\u00a02017<\/i><\/small>\nContact: GerdHoeren at Gmail dot com<\/i><\/small><\/pre>\n","protected":false},"excerpt":{"rendered":"
2002 Mercedes SLK 230 (R170 Chassis) At 40,000 miles, my Check Engine light came on — sad.\u00a0 The error code was P0410: Secondary Air Injection System Fault.\u00a0 Secondary air warms up the catalytic converter by diverting air from the kompressor.\u00a0 This happens for the first 150 seconds of cold engine operation.\u00a0\u00a0(Other cars have a separate … Continue reading Check Engine Error P0410<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":376,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-347","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"http:\/\/gerdhoeren.me\/WordPress\/wp-json\/wp\/v2\/pages\/347","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/gerdhoeren.me\/WordPress\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"http:\/\/gerdhoeren.me\/WordPress\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"http:\/\/gerdhoeren.me\/WordPress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/gerdhoeren.me\/WordPress\/wp-json\/wp\/v2\/comments?post=347"}],"version-history":[{"count":5,"href":"http:\/\/gerdhoeren.me\/WordPress\/wp-json\/wp\/v2\/pages\/347\/revisions"}],"predecessor-version":[{"id":703,"href":"http:\/\/gerdhoeren.me\/WordPress\/wp-json\/wp\/v2\/pages\/347\/revisions\/703"}],"up":[{"embeddable":true,"href":"http:\/\/gerdhoeren.me\/WordPress\/wp-json\/wp\/v2\/pages\/376"}],"wp:attachment":[{"href":"http:\/\/gerdhoeren.me\/WordPress\/wp-json\/wp\/v2\/media?parent=347"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}