{"product_id":"afm-dfm-vcm-disabler-honda-accord-2008-2017-v6-vcm-disabler","title":"Honda Accord 2008-2017 V6 VCM Disabler Harness","description":"\u003cp\u003eThis harness keeps the 3.5L V6 in the 2008–2017 Honda Accord running on all six cylinders. It plugs in between the ECT1 coolant temperature sensor and its connector and offers four resistance settings (68Ω, 82Ω, 100Ω and 120Ω) for the ECT1 signal.\u003c\/p\u003e\u003cp\u003eIt is fully reversible and leaves the engine computer untouched.\u003c\/p\u003e\u003ch2\u003eVehicles and years\u003c\/h2\u003e\u003cp\u003eEach row below is listed as a 100% fitment match for this harness:\u003c\/p\u003e\u003cul\u003e\u003cli\u003eHonda Accord: 2008–2017\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003eOn the Accord, VCM came with the V6 and automatic transmission from 2008 through 2017: VCM-2 on 2008–2012 models, VCM-3 (J35Y1) on 2013–2017 models. The 6-speed manual V6 coupe does not have VCM.\u003c\/p\u003e\u003cp\u003eIf your vehicle's engine or trim is not one of the VCM versions described here, send the VIN to support before ordering.\u003c\/p\u003e\u003ch2\u003eHow the factory system decides\u003c\/h2\u003e\u003cp\u003eHonda introduced VCM on the 2005 Odyssey. It shuts down the rear bank of the V6 during cruising and deceleration by disabling those valves through the VTEC system and stopping fuel delivery. Later versions added a 4-cylinder mode, and the newest go back to 3 or 6. Each switch is timed by the engine computer using speed, load, gear and temperature inputs.\u003c\/p\u003e\u003ch2\u003eWhat the resistance settings do\u003c\/h2\u003e\u003cp\u003eBecause VCM is held off until the engine is warm, the coolant temperature input is the cleanest point to control it without touching software. The harness places a selectable resistor in the ECT1 signal circuit. Higher values shift the reading further. Pick the setting listed for your model in the instructions rather than going straight to the highest value.\u003c\/p\u003e\u003ch2\u003eAfter installation\u003c\/h2\u003e\u003cp\u003eThe change is most noticeable at steady cruising speed on a warm engine, where VCM previously cut in. With the harness installed, that mode change should no longer happen. Acceleration and full-throttle behavior are the same as before. If a check-engine light appears, recheck the connections and the resistance setting against the instructions, then contact support with the code.\u003c\/p\u003e\u003ch2\u003eCommon reasons to disable VCM\u003c\/h2\u003e\u003cp\u003eOwners usually want three things: no shudder at steady cruise, smoother behavior at the moderate, steady speeds where VCM switches most, and fewer worries about oil getting past the rings on the idle bank. The harness gives consistent six-cylinder operation. It does not add power and it is not a repair for an engine that already burns oil or misfires.\u003c\/p\u003e\u003ch2\u003eVCM generations at a glance\u003c\/h2\u003e\u003cp\u003eThere are three main VCM versions: VCM-1 (3 or 6 cylinders), VCM-2 (3, 4 or 6 cylinders) and VCM-3 (3 or 6 cylinders, on the later direct-injection J35Y engines). The version depends on model year, and the notes above show which applies to each covered generation. Since all of them rely on the engine computer's temperature checks, the ECT1 approach applies across the range.\u003c\/p\u003e\u003ch2\u003eConnecting the harness\u003c\/h2\u003e\u003cp\u003eWith the engine cold and the ignition off, unplug the factory connector from the ECT1 sensor, plug the harness into the sensor, and plug the factory connector into the harness. Set the resistance selector to the value the instructions list, secure the harness away from the exhaust, belts and fan, and start the engine. The connection is inline, not at the OBD-II port. To remove it, reconnect the factory plug directly to the sensor.\u003c\/p\u003e\u003ch2\u003eCheck the engine first\u003c\/h2\u003e\u003cp\u003eScan for codes and fix any existing misfire, oil-consumption or sensor problem first. A harness that changes the ECT1 reading will not cure a failing sensor or a cooling-system fault, and an engine that already fouls plugs on one bank needs inspection. Watch coolant level and the temperature gauge as you would normally.\u003c\/p\u003e\u003ch2\u003eBefore ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eYour model and year match a row above (2008–2017 Honda Accord).\u003c\/li\u003e\n\u003cli\u003eYour vehicle has the V6 with VCM described in the notes above (not a four-cylinder, hybrid or turbo model).\u003c\/li\u003e\n\u003cli\u003eThe connector at your ECT1 sensor matches the product photos.\u003c\/li\u003e\n\u003cli\u003eEngine swaps, aftermarket ECUs or modified wiring need a fitment check from support first.\u003c\/li\u003e\n\u003cli\u003eUnsure? Send your VIN to support@automotivebypass.com.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFitment table\u003c\/h2\u003e\u003cp\u003eOne row per model year from the fitment data. Check the generation notes above for years without VCM:\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eYear\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eEngine\u003c\/th\u003e\n\u003cth\u003eListing note\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e2008\u003c\/td\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eAccord\u003c\/td\u003e\n\u003ctd\u003e3.5L V6\u003c\/td\u003e\n\u003ctd\u003e100% Fitment Match | OEM-Grade Quality | Plug \u0026amp; Play\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2009\u003c\/td\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eAccord\u003c\/td\u003e\n\u003ctd\u003e3.5L V6\u003c\/td\u003e\n\u003ctd\u003e100% Fitment Match | OEM-Grade Quality | Plug \u0026amp; Play\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2010\u003c\/td\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eAccord\u003c\/td\u003e\n\u003ctd\u003e3.5L V6\u003c\/td\u003e\n\u003ctd\u003e100% Fitment Match | OEM-Grade Quality | Plug \u0026amp; Play\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2011\u003c\/td\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eAccord\u003c\/td\u003e\n\u003ctd\u003e3.5L V6\u003c\/td\u003e\n\u003ctd\u003e100% Fitment Match | OEM-Grade Quality | Plug \u0026amp; Play\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2012\u003c\/td\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eAccord\u003c\/td\u003e\n\u003ctd\u003e3.5L V6\u003c\/td\u003e\n\u003ctd\u003e100% Fitment Match | OEM-Grade Quality | Plug \u0026amp; Play\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2013\u003c\/td\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eAccord\u003c\/td\u003e\n\u003ctd\u003e3.5L V6\u003c\/td\u003e\n\u003ctd\u003e100% Fitment Match | OEM-Grade Quality | Plug \u0026amp; Play\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2014\u003c\/td\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eAccord\u003c\/td\u003e\n\u003ctd\u003e3.5L V6\u003c\/td\u003e\n\u003ctd\u003e100% Fitment Match | OEM-Grade Quality | Plug \u0026amp; Play\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2015\u003c\/td\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eAccord\u003c\/td\u003e\n\u003ctd\u003e3.5L V6\u003c\/td\u003e\n\u003ctd\u003e100% Fitment Match | OEM-Grade Quality | Plug \u0026amp; Play\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2016\u003c\/td\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eAccord\u003c\/td\u003e\n\u003ctd\u003e3.5L V6\u003c\/td\u003e\n\u003ctd\u003e100% Fitment Match | OEM-Grade Quality | Plug \u0026amp; Play\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2017\u003c\/td\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eAccord\u003c\/td\u003e\n\u003ctd\u003e3.5L V6\u003c\/td\u003e\n\u003ctd\u003e100% Fitment Match | OEM-Grade Quality | Plug \u0026amp; Play\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eBefore you install\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCold engine, ignition off.\u003c\/li\u003e\n\u003cli\u003eInstructions for your model at hand.\u003c\/li\u003e\n\u003cli\u003eECT1 sensor found and its connector compared with the photos.\u003c\/li\u003e\n\u003cli\u003eResistance selector set as the instructions specify.\u003c\/li\u003e\n\u003cli\u003eHarness fitted between sensor and factory plug, both latches engaged.\u003c\/li\u003e\n\u003cli\u003eLead secured away from the exhaust and drive belts.\u003c\/li\u003e\n\u003cli\u003eRoad test: warm engine, light cruise, watch for warning lights.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTroubleshooting\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eA code is set:\u003c\/strong\u003e Remove the harness, reconnect the original plug and email support with the code, VIN and setting.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eVCM not disabled:\u003c\/strong\u003e Check the sensor location and latches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eGauge reads oddly:\u003c\/strong\u003e Ask support before further driving.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eShudder continues:\u003c\/strong\u003e Look at the engine mounts; the harness only controls VCM.\u003c\/p\u003e\u003ch2\u003eWhy VCM can be felt\u003c\/h2\u003e\u003cp\u003eHonda knew three-cylinder mode would feel different, so VCM vehicles use Active Control Engine Mounts and an Active Noise Control system that cancels low-frequency cabin noise through the speakers. Both were introduced with VCM on the 2005 Odyssey. If either is worn or faulty, VCM transitions become easier to feel, which is a frequent reason owners look for a disabler.\u003c\/p\u003e\u003ch2\u003eTerms used on this page\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eECT1:\u003c\/strong\u003e Engine coolant temperature sensor 1, the input this harness works on.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eVCM:\u003c\/strong\u003e Variable Cylinder Management, Honda's cylinder deactivation system on 3.5L V6 engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eThermistor:\u003c\/strong\u003e A sensor whose resistance changes with temperature; coolant sensors drop in resistance as the engine warms.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eJ35:\u003c\/strong\u003e Honda's 3.5L V6 engine family; suffixes such as Z4 or Y6 identify the version.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eVTEC:\u003c\/strong\u003e Honda's variable valve system; VCM uses its rocker-arm mechanism to keep valves closed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eACM:\u003c\/strong\u003e Active Control Engine Mount, used by Honda to counter vibration in reduced-cylinder mode.\u003c\/p\u003e\u003ch2\u003eQuestions owners ask\u003c\/h2\u003e\u003ch3\u003eWhich Honda Accord years are listed?\u003c\/h3\u003e\u003cp\u003eThe fitment table lists Honda Accord 2008–2017. VCM fitment also depends on engine and trim, so check the notes on this page.\u003c\/p\u003e\u003ch3\u003eWhat do the 68Ω, 82Ω, 100Ω and 120Ω settings mean?\u003c\/h3\u003e\u003cp\u003eThey are resistance values added to the ECT1 signal, not power levels. Use the setting the instructions give for your vehicle.\u003c\/p\u003e\u003ch3\u003eWill it fix oil consumption or misfires?\u003c\/h3\u003e\u003cp\u003eNo. Diagnose and repair existing faults first. The harness only prevents VCM from engaging.\u003c\/p\u003e\u003ch3\u003eDoes this VCM harness plug into the OBD-II port on the Honda Accord?\u003c\/h3\u003e\u003cp\u003eNo. It connects inline at the ECT1 coolant temperature sensor connector.\u003c\/p\u003e\u003ch3\u003eCan I return to factory VCM?\u003c\/h3\u003e\u003cp\u003eYes. Unplug the harness and reconnect the factory connector to the sensor.\u003c\/p\u003e\u003ch3\u003eWhich resistance setting should I use?\u003c\/h3\u003e\u003cp\u003eStart with the setting the instructions list for your model. If a check-engine light appears, unplug the harness, read the code and contact support with the VIN and the code.\u003c\/p\u003e\u003ch3\u003eWill it add horsepower?\u003c\/h3\u003e\u003cp\u003eNo. It keeps all six cylinders active. Power at full throttle is unchanged because VCM is not active at full throttle.\u003c\/p\u003e\u003ch3\u003eDoes fuel economy change?\u003c\/h3\u003e\u003cp\u003eUsually a little at light-load cruising, because that is where VCM saved fuel. Acceleration and full-throttle driving always ran on six cylinders.\u003c\/p\u003e\u003ch3\u003eDoes it work on four-cylinder, hybrid or turbo models?\u003c\/h3\u003e\u003cp\u003eNo. Those engines do not use VCM. The harness is for the 3.5L V6 VCM engines described on this page.\u003c\/p\u003e\u003ch3\u003eIs it the same as an OBD-II VCM device or a tune?\u003c\/h3\u003e\u003cp\u003eNo. OBD-II devices and software tunes work through the engine computer. This harness only changes the ECT1 sensor signal and leaves the software untouched.\u003c\/p\u003e\u003ch2\u003eOrdering details\u003c\/h2\u003e\u003cp\u003eStandard shipping inside the lower 48 states costs nothing; allow 1–2 business days of handling plus 3–4 in transit. Returns need approval first and must be requested within 45 days. Approved returns are subject to a 20% restocking fee, with return shipping paid by the customer. A 3-year limited warranty applies. Email support@automotivebypass.com (Mon–Fri, 9–5 PST) with your VIN if you want a fitment check.\u003c\/p\u003e","brand":"Automotivebypass","offers":[{"title":"Default Title","offer_id":56493788168564,"sku":"RC-VCM-01-03","price":79.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1030\/8439\/2820\/files\/RC-VCM-01-03-1.jpg?v=1793172662","url":"https:\/\/automotivebypass.com\/products\/afm-dfm-vcm-disabler-honda-accord-2008-2017-v6-vcm-disabler","provider":"Automotivebypass","version":"1.0","type":"link"}