{"id":44921,"date":"2022-08-08T12:35:30","date_gmt":"2022-08-08T12:35:30","guid":{"rendered":" https:\/\/dev.way.com\/blog\/?p=44921"},"modified":"2022-08-09T10:24:07","modified_gmt":"2022-08-09T10:24:07","slug":"p040d-error-code","status":"publish","type":"post","link":"https:\/\/dev.way.com\/journal\/p040d-error-code\/","title":{"rendered":"All You Need to Know About P040D Error Code"},"content":{"rendered":"<p style=\"text-align: center;\"><em>P040D error code is a diagnostic trouble code (DTC) applicable to OBD-II vehicles in general. The precise repair steps may vary depending on the model year, manufacturer, and powertrain configuration. Read to know more.<\/em><\/p>\n<h2><span data-contrast=\"auto\">What is the P040D error code?<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/h2>\n<p><span data-contrast=\"auto\">Exhaust Gas Recirculation (EGR) temperature sensors are variable resistors that determine the exhaust gas temperature at the inlet and outlet of the EGR cooler. The Engine Control Module (ECM) supplies the EGR temperature sensor signal circuit with 5 volts and the low reference circuit with a ground. <\/span><\/p>\n<p><span data-contrast=\"auto\">The sensor resistance is high when the EGR temperature sensor is cold. The sensor resistance decreases as the EGR temperature rises. The ECM detects a higher voltage with a high sensor resistance on the EGR temperature signal circuit. <\/span><\/p>\n<p><span data-contrast=\"auto\">The ECM detects a lower voltage on the EGR temperature signal circuit when sensor resistance is reduced. When the ECM detects the EGR temperature sensor resistance greater than 885 for more than 5 seconds, it will set the Diagnostic Trouble Code (DTC).<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/media.ed.edmunds-media.com\/non-make\/fe\/fe_507113_1600.jpg\" alt=\"p040d error code\" width=\"697\" height=\"465\" \/><\/p>\n<h2><span data-contrast=\"auto\">P040D error code: Symptoms<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/h2>\n<ul>\n<li><span data-contrast=\"auto\">The smog or emissions state could begin to fail.<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"auto\">Starting to hear engine noises such as knocking, rattling, pinging, etc.<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"auto\">Engine Light ON can begin blinking.<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"auto\">Issue with louder exhaust.<\/span><\/li>\n<li><span data-contrast=\"auto\">There may be numerous exhaust odors.<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/li>\n<\/ul>\n<p><a href=\"https:\/\/www.way.com\/way-plus\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/blog.way.com\/wp-content\/uploads\/2022\/03\/WAY-PLUS.png\" alt=\"p040d error code\" width=\"794\" height=\"294\" \/><\/a><\/p>\n<h2><span data-contrast=\"auto\">P040D error code: Causes<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/h2>\n<ul>\n<li><span data-contrast=\"auto\">The wiring harness or sensor may have caught fire.<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"auto\">Temperature of recirculated exhaust gas harness for sensor &#8216;A&#8217; may be open or shorted.<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"auto\">A faulty electrical connection in the exhaust gas recirculation temperature is possible. <\/span><\/li>\n<li><span data-contrast=\"auto\">Imperfections in the connector<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"auto\">The exhaust gas recirculation temperature sensor can have defects.<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"auto\">The EGR temperature sensor gasket has a leak.<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"auto\">The sensor is mounted on an exhaust pipe that is cracked or leaking.<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"auto\">Engine control module may have problems.<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"auto\">Temperature sensor &#8216;A&#8217; for exhaust gas recirculation exhibits anomalies.<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/li>\n<\/ul>\n<h2><span data-contrast=\"auto\">P040D error code: Diagnosis<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/h2>\n<p><span data-contrast=\"auto\">The following steps should be taken to diagnose this fault code:<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"auto\">Initially, you must visually inspect the sensor and surrounding EGR system, specifically looking for exhaust leaks. Check the sensor and its harness as well. <\/span><span data-contrast=\"auto\">Keep in mind that high temperatures can wreak havoc on plastic and rubber-insulated wires, so thoroughly inspect them. <\/span><\/p>\n<p><span data-contrast=\"auto\">Consider that the black soot may indicate an exhaust leak in the vicinity.<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><span data-contrast=\"auto\">Various factors may have contributed to the accumulation of soot in the exhaust, which has caused numerous EGR problems (poor maintenance, low-quality fuel, etc.)<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"auto\">In this instance, there is no exception, so it may be prudent to clean your EGR system or at least the temperature sensor. Be mindful that sensors mounted within the exhaust systems may feel seized when attempting to detach them.<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"auto\">Remember that these sensors are susceptible to significant temperature fluctuations, so a bit of heat from an Oxyacetylene torch (not for the uninitiated) may help loosen the sensor.<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"auto\">After removing the sensor, use carburetor cleaner or a comparable product to thoroughly soak the soot. Next, use a wire brush to remove excessively accumulated soot. When reinstalling the clean sensor, you must apply anti-seize to the threads to prevent them from seizing.<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"auto\">Measure the actual electrical values of the sensor and compare them to the manufacturer-specified ideal values. This can be accomplished with a Multimeter and manufacturer-specific pin-out testing procedures.<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/p>\n<h2><span data-contrast=\"auto\">Fixes<\/span><\/h2>\n<ul>\n<li><span data-contrast=\"auto\">Replace or repair the temperature sensor for the exhaust gas recirculation system.<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"auto\">It is crucial to repair the faulty wires.<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"auto\">Restore the faulty connector with care<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"auto\">It is always possible to replace a faulty engine control module.<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"auto\">Ensure that the connections are repaired<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"auto\">Properly repairing the EGR temperature sensor gasket leak is required.<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/li>\n<\/ul>\n<p><span data-contrast=\"auto\">If your OBD Code is still flashing, there is no need to stress because we are at your service. View our extensive selection of EGR valve cleaners, EGR systems, sensors, radiator leak sealants, and EGR cleaners. Now, your problems would vanish immediately.<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/p>\n<h2><span data-contrast=\"auto\">How serious is P040D?<\/span><\/h2>\n<p><span data-contrast=\"auto\">The severity of this problem depends a lot on your specific issue, and it&#8217;s not that severe like other codes. Still, exhaust leaks and leaking or broken EGR temperature sensors aren&#8217;t &#8220;good&#8221; for your car, so maintenance is the key, and you should do it as soon as possible.<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/p>\n<h2><span data-contrast=\"auto\">Cost of diagnosing P040D code<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/h2>\n<p><span data-contrast=\"auto\">Auto repair rates depend on where you live, the make and model of your car, and even the engine it has. Most shops charge between $75 and $150 per hour to fix cars.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;201341983&quot;:0,&quot;335551550&quot;:1,&quot;335551620&quot;:1,&quot;335559685&quot;:0,&quot;335559737&quot;:0,&quot;335559738&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/p>\n<p>&nbsp;<\/p>\n<hr \/>\n<p style=\"text-align: center;\"><em>Here&#8217;s more info on <a tabindex=\"-1\" title=\"https:\/\/www.way.com\/airport-parking\" href=\"https:\/\/www.way.com\/airport-parking\" target=\"_blank\" rel=\"noopener noreferrer\" aria-label=\"Link top-rated airport parking\">top-rated airport parking<\/a>,\u00a0<a tabindex=\"-1\" title=\"https:\/\/www.way.com\/cities\" href=\"https:\/\/www.way.com\/cities\" target=\"_blank\" rel=\"noopener noreferrer\" aria-label=\"Link the best parking spots in your city\">the best parking spots in your city<\/a>, affordable\u00a0<a tabindex=\"-1\" title=\"https:\/\/www.way.com\/auto-insurance\" href=\"https:\/\/www.way.com\/auto-insurance\" target=\"_blank\" rel=\"noopener noreferrer\" aria-label=\"Link auto insurance\">auto insurance<\/a>, easy\u00a0<a tabindex=\"-1\" title=\"https:\/\/www.way.com\/auto-refinance\" href=\"https:\/\/www.way.com\/auto-refinance\" target=\"_blank\" rel=\"noopener noreferrer\" aria-label=\"Link auto refinance\">auto refinance<\/a>,\u00a0and\u00a0<a tabindex=\"-1\" title=\"https:\/\/www.way.com\/car-wash-near-me\" href=\"https:\/\/www.way.com\/car-wash-near-me\" target=\"_blank\" rel=\"noopener noreferrer\" aria-label=\"Link high-quality car washes near you\">high-quality car washes near you<\/a>.\u00a0\u00a0<\/em><\/p>\n<hr \/>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>P040D error code is a diagnostic trouble code (DTC) applicable to OBD-II vehicles in general. The precise repair steps may vary depending on the model year, manufacturer, and powertrain configuration. Read to know more. What is the P040D error code?\u00a0 Exhaust Gas Recirculation (EGR) temperature sensors are variable resistors that determine the exhaust gas temperature&hellip; <a class=\"more-link\" href=\"https:\/\/dev.way.com\/journal\/p040d-error-code\/\">Continue reading <span class=\"screen-reader-text\">All You Need to Know About P040D Error Code<\/span><\/a><\/p>\n","protected":false},"author":49,"featured_media":44931,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1,5676],"tags":[],"class_list":["post-44921","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cars-explained","category-engine-codes","entry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.3 (Yoast SEO v28.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>All You Need to Know About P040D Error Code &#187; Way Blog<\/title>\n<meta name=\"description\" content=\"P040D error code is a diagnostic trouble code (DTC) applicable to OBD-II vehicles in general. 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