![]() The upstream part checks the oxygen level in exhaust gasses and sends it to the ECU to optimize the air-to-fuel ratio. The first one is before, and the second one is after the SCR system. There are also two 6-wire oxygen sensors on the exhaust system of the Cummins 6.7-liter engine. However, its failure can result in increased fuel consumption. They have the purpose of controlling nitrogen oxide emissions to fulfill EPA regulations. While the second one is on the tailpipe after the selective catalytic reduction (SCR) system. The first one is the upstream sensor right after the turbo downpipe. There are 2 NOx sensors on Cummins 6.7-liter engine. It also has a role in the regenerative emission process of the engine to measure its pressure and tell ECU to control the regenerative gasses rate into the intake system. It measures the filter’s pressure, and any abnormal pressure value indicates a choked filter. The location of the crankcase pressure sensor is on top of the valve cover, right behind the crankcase vent filter. A faulty IAT can result in increased fuel consumption and symptoms like a hard start or loss of power. This information is vital for the engine to ensure its correct ignition timing. Therefore, it measures the ambient temperature of the air. Its probe is inside the second air intake runner, which is the cold air intake side. You can find it on the top left side of the intake manifold. IAT is a 2-wire sensor to measure the temperature of the air intake. You will often need to clean it from dirt or oil on its electrodes for accurate performance. Its purpose is to measure the airflow entering the engine and send the information to the ECU.īased on this data, ECU will control the fuel required and engine timing. You can locate the MAF sensor on your Cummins 6.7-liter engine at the air filter box close to the intake manifold. Engine coolant temperature (ECT) sensor.Manifold absolute pressure (MAP) sensor.Here is a list of various sensors installed on the 6.7-liter engine and their location to facilitate you during repair work. We will also highlight the purpose of each sensor and possible causes for its malfunctioning to facilitate you during repair work.Ĭummins’s 6.7-liter turbo diesel engine uses several sensors to measure its parameters, including temperature, pressure, fluid levels, position, and speed. This article will guide you regarding the location of many sensors on the Cummins 6.7-liter I6 engine to ensure optimal performance. Furthermore, the EGR temperature sensor has a location on the crossover tube. You can find the crankshaft and camshaft position sensors on the left-hand side of the crank pulley beside each other. NOx, O2, and differential pressure sensors are present on the exhaust manifold. Mass air flow and intake air temperature sensors are located on the intake manifold of the Cummins 6.7L engine. Moreover, these engines have several sensors to ensure peak performance with improved fuel economy and emission control to meet the regulations. It has high power output and torque ratings suitable for high-end applications. You can use the contact form at the end of the article.Cummins 6.7-liter I6 engine has been a part of heavy-duty pickup trucks like Dodge Ram 2500/3500 since 2007. ![]() If you do spot errors, please let me know. © copyright Abraham Torres-Arredondo: This information is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. So without further ado, here's my disclaimer: I don't have a staff of proof readers or editors, I'm just a little guy typing this stuff up in my spare time to help and give back to the Do-It-Yourself community. I've made every effort to double and triple check the above info (and in the next couple of pages) and I've used the best sources to compile it but nothing in life is perfect.
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