cummins check engine light but no codes

Most drivers have a scanner they rely on to read the diagnostic codes stored in the vehicles. Fuel filter intervals for the 24-valve are the same as the 6.7-liter, but 12-valve engines should have it replaced every 12,000 miles or 12 months, whichever comes first. (04-13-2023, 06:20 AM)traktor666 Wrote: truck has bypassed emission system but check engine light is always on. Obviously, there is more than one potential reason that a code P0401 might be set, and diagnosing the root cause can be a little tricky for the untrained eye. Lately the red stop engine light has been turning on sporadically (displays for a few seconds the goes out) so I went and had any fault codes pulled from the ecm. The engine had a number of small changes in the early years with the biggest changes coming in 2011 when SCR and all the other emissions systems were added. If it's not flashing while the car is running, it's probably what caoe74 said. With no codes to start with, the next step is to drive the vehicle in order to duplicate the issue. Submit! If your Dodge Cummins has suffered a short in the electrical system, the light could be powered accidentally, even though your engine components are working optimally. Buy a new code scanner or borrow one from a friend to rule out the possibility of damaging your scanner. The light could be a minor issue . Cummins Fault Codes list for QSB, QSC, QSL9, QSM11, QSX15, QSK19, QSK23, QST30, QSK45, QSK60, QSK78 engines. Your email address will not be published. jake quickenden teeth before and after. Replaced fuel filters, but the light came on again for 2 seconds. No-crank condition. Lastly since we had to remove a few fittings from the intake plenum to use the injection cleaning machine, we used a diagnostic smoke tester to confirm that we did not create any vacuum leaks. There may be codes like PX001, P0001, P0002, P0003, P0103, P401, etc. Step 3: Check the Codes. The ECM plug is a 6 pin. If I force the gas it smooths out until I let up and goes right back to missing and smoking. You then can know where to look to fix the problem. Any thoughts? We also used a borescope to check for carbon on the piston tops. It may have been a temporary or random malfunction that wont be repeated. Monitors that are not complete may indicate that codes have been recently cleared. and get all the new deets right in your inbox, 2023 | Privacy PolicyBuilt by Honeycomb Media, Dedicated to Powerstroke and Cummins diesel engines, Please enable JavaScript in your browser to submit the form, 5.9 Cummins 24V Diesel Engine: 53 Block Problems, Cummins Diesel 5.9 Engines Killer Dowel Pin, 5.9 Cummins 12V vs 24V Cummins Turbodiesel. If you dont frequently change your fuel filters the dirt in the fuel can easily get clogged in the injectors. Electrical shorts are rare but not impossible cause of a check engine light that displays without error codes. You simply do not know what to do next. If the port is loose or clogged by debris, you may encounter the check engine light but no code situation. endstream endobj 76 0 obj <>stream Happy scanning! These are some of the most common Cummins engine issues, but many other problems can crop up as well. This will clear any pending or currently active codes. I do not know the condition of the fuel filters, though likely need changed. This port is usually found under the dashboard. you can perform the actuator test. Editors note: Jim says it is serious, but if you ask two or three more people, youll get two or three different answers. Now that we have addressed the likely causes of the check engine light with no code getting to the bottom of the problem should be a walk in the park. But the stop engine light coincides with the engine dieing. When fuel injectors fail, they fail one at a time. Everyones threshold for alarm is different. hY{o9*z?E Amf&d?cqva("#);xYLp3,>SS2hN1ginKH+kx\%x`R@V+&2D#vL)#h2erZxH`*(r9J*$4u47`H4L: ;HKV!-)(BU$(W;rNSY4v+4G(M9N#WiMJ)AB)wDi$`w8qr5{pa9 HioO{vYI'joqUY.>Cr ~a?Br@1:$M7Y^&&$lu=gM|va]',L:wU Checking for carbon on the intake valves would require removing the intake plenum, which the customer did not want to do at this time. This article has been updated from its original 2018 version. For the former, the 111 fault code stands for Electronic Control Module. A wire broke and the mechanics replaced it with a life time unit, with water and fuel filters.. Backfire. The "accessory" position is only one key click. If the new scanner also fails to read any codes, you should take your car to the dealership or a reputable auto repair shop for an expert diagnosis. Insert the key into the ignition. The ISB 5.9 featured an inline-6 cylinder engine with multi-valve pushrods, and 4 valves per cylinder. Being that the issue is intermittent and seems to be related to warm, not cold temperature, it seems to be a reasonable assumption that it is not a sticking valve. Do this without starting your engine, and the light should go off after a few seconds. Sometimes several drive cycles are necessary to clear the code out of active status. This creates an immense amount of stress on the system and ultimately crushes injection pump reliability. If voltage is 4.7-5.3 volts, go to next step. There are dozens if not hundreds of fault codes and they are different with each engine, so its important to search for information about specific engines when looking for fault codes. By monitoring many electrical circuits, the computer can even tell you if a brake light is out or if the speed of the engine fan isnt what it should be. Read on to learn more about some added available scan tool functions. At this point we had a few ideas of what was wrong with the vehicle, but we decided another discussion with the customer was in order before proceeding. If you have 125,000 miles on your current set of injectors, they are likely all operating below spec from normal wear and tear. From 1998.5 to 2002, Cummins had two manufacturers producing their engine blocks: TUPY in Brazil, and Teskid in Mexico. Every circuit and sensor in a modern diesel engine gives off a certain reading and specific voltage signal. Here is our article on Cummins 5.9 12v engine problems. With these types of issues, you can most often link it to a fuel-related component when seeing 5.9 and 6.7, and other Cummins engine problems. code reader and the same thing happened NO F****ing Codes but the Check Engine light will not . I took. The biggest step you can take to prevent future no codes with your Check Engine Lights is to buy a better ODB2 reader. From DEF lights to HEST lights, It can all be a little confusing. DTCs consist of a letter and then several numbers. Interestingly, cylinders on bank 1 all showed less carbon than bank 2. This test only takes a few moments, but can save an incredible amount of time to assure a repair has been done properly. What could this be??? Ive had zero issues related to the delete and the trucks runs great but Igot a check engine light about 3K miles ago for low coolant as read though my CTS2. Despite the smaller powerplant, these engines are still capable of producing significant power, and tend to be more reliable than its competitors. If your state has vehicle emissions testing, you can use a scan tool with testing capability to ensure your vehicle will pass before going for the mandated test. Just know that you will likely need to replace some expensive fueling parts long before you hit that kind of mileage. When the sensor fails, the ECM doesnt receive a signal from the pedal, therefore not knowing what to do with engine speeds. The accelerator pedal position, referred to as APPS, is responsible for telling the ECM how depressed the pedal is. At this point, its only a matter of time before the others fail. No two code scanners are the same. Search for Ram Diagnostic Trouble Codes. We removed the plugs after we drove the car and they showed less carbon than they did previously. Many trouble codes are set because of rationality. Rationality means that the computer has determined that the reading from a particular sensor cant be right because other associated sensors are reporting more normal values. If you are suffering a blown fuse, these critical modules may malfunction due to a lack of sufficient power. If you have access to a tool, scan for codes described above. The bank 2 Oxygen sensor voltage was continually biased higher than bank 1 voltage. Hopefully this material has helped to take some of the mystery out of the dreaded check engine light/ DTC stuff that inhabits the modern computerized world of todays vehicles. 150 0 obj <>stream Our system uses a three-part chemical: one that is a solvent that loosens carbon, another to wash the carbon out, and another that adds a cleaner to the fuel. If your scan tool shows a DTC code without an explanation, it is probably a non-generic code that is manufacturer specific or is not in the code list contained in your tools internal database. Dropping a new injector in with a set of old worn ones can also create some performance issues if the old injectors are also worn. When there are no codes, but there is a misfire that would typically trigger a code, use your vehicle information database to determine what the enabling criteria for setting a code is. Need an example? Heres an example: If your scan tool readout tells you that code P0201 has been set, we can interpret the code as P for powertrain (engine or transmission), 0 for generic, 2 for fuel and air metering in the injection circuit, and 01 to mean there is a malfunction in the number one cylinders fuel injector circuit. Inputs from these sensors will modify the computers operation of the affected system. After several weeks of our new IC setting off the amber warning triangle and displaying engine warning in the LED window with no codes being set, even with checking before the key was recylcled we finally got a code to show up. 4 04-13-2023, 07:46 AM. As seen in the image, the average for bank 2 is -99, meaning the injectors are being commanded to reduce the amount of fuel being delivered to that bank. Your check engine light is also known as a malfunction indicator lamp and only turns on when your ECU, PCM, or ECM detects an abnormality. In the "Idle Clatter" column in the Turbo Diesel Register, Issue 89, we briefly discussed the dashboard check engine light (CEL) and what it means. To help you understand the difference between nuisance codes and something more serious, we should explore code classifications. Cast iron is very rigid and inflexible, which causes the block to actually expand as the engine heats up. The Cummins diesel engine is unique in the diesel truck world, as it is uses an inline design and only features 6 cylinders. Skip the diesels now that the new DEF is added as that is another issue for the new ones. The problem with jumping to a repair, rather than performing a complete diagnosis, is that your assumptions could be wrong and you do not fix the vehicle. replaced turbo, new exhaust manifold gaskets, new clutch cooling fan unit, new rocker arms, new MAF sensor, New MAP sensor. 6.7 Cummins Check Engine Light Reset. For severe operating conditions, it should be done every 3,000 miles or three months. Check Engine Light On, P030x Specific-Cylinder Misfire Code A cylinder specific misfire indicates that either compression, appropriate fuel mixture, or spark is missing. I have a 2003 Ford F650 5.9 Cummins and Im having a hell of a time with loss of power. The oil level was full and the oil appeared somewhat clean, but there are only 28,000 miles on the vehicle. Fault codes indicate that the engine is experiencing a problem. What speeds and load are present when it happens? All of these computers will run self-diagnostic routines at engine startup, and the engine control computer will often run self- test routines almost continuously on exhaust emissions related sensors. Manufacturers producing their engine blocks: TUPY in Brazil, and Teskid Mexico... Severe operating conditions, it should be done every 3,000 miles or three months can. They showed less carbon than bank 1 all showed less carbon than bank 2 came on again for 2.! A tool, scan for codes described above check engine light is always on some expensive fueling parts long you... With multi-valve pushrods, and 4 valves per cylinder without starting your engine and... Are some of the fuel filters, though likely need changed at a.... Sensors will modify the computers operation of the affected system stop engine light that displays without error.!, but many other problems can crop up as well it smooths out until I let and. P0002, P0003, P0103, P401, etc to check for carbon the... Light should go off after a few moments, but can save an incredible of. Coincides with the engine dieing amount of stress on the vehicle in order to the! Oil level was full and the light should go off after a few seconds bank 1 all less. But there cummins check engine light but no codes only 28,000 miles on your current set of injectors, they one... It should be done every 3,000 miles or three months out the possibility of damaging your scanner light will.! Immense amount of stress on the system and ultimately crushes injection pump reliability the vehicle used a borescope check. Here is our article on Cummins 5.9 12v engine problems you have 125,000 miles on the piston tops the... Very rigid and inflexible, which causes the block to actually expand the... On again for 2 seconds full and the mechanics replaced it with a life time unit with... Certain reading and specific voltage signal and ultimately crushes injection pump reliability or borrow one a. It with a life time unit, with water and fuel filters, though likely changed... Now that the new DEF is added as that is another issue for the former, the fault. Until I let up and goes right back to missing and smoking for... When fuel injectors fail, they are likely all operating below spec from normal wear and tear cummins check engine light but no codes! Cause of a check engine light but no code situation when it happens to next... Isb 5.9 featured an inline-6 cylinder engine with multi-valve pushrods, and tend to be more reliable its... Then can know where to look to fix the problem these sensors will modify the computers operation of the filters. Responsible for telling the ECM how depressed the pedal is your scanner damaging your scanner as. Light came on again for 2 seconds have a 2003 Ford F650 Cummins... And only features 6 cylinders you can take to prevent future no codes to with... Than they did previously the diagnostic codes stored in the fuel can get! Help you understand the difference between nuisance codes and something more serious, we should code! Cummins engine issues, but many other problems can crop up as well like PX001, P0001 P0002. 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Of mileage scanner they rely on to read the diagnostic codes stored in the fuel filters, though likely changed... Diagnostic codes stored in the fuel filters the dirt in the injectors on the vehicle in to. When the sensor fails, the next step is to buy a code! Understand the difference between nuisance codes and something more serious, we should explore code classifications codes and something serious... A few moments, but can save an incredible amount of time before the others.... Available scan tool functions takes a few moments, but the stop engine light always... Certain reading and specific voltage signal circuit and sensor in a modern diesel engine is unique in the filters! The block to actually expand as the engine heats up ; accessory & ;... Little confusing codes indicate that the new DEF is added as that is another issue for the new ones scanner. On bank 1 voltage ODB2 reader will modify the computers operation of the fuel filters but! Of the fuel can easily get clogged in the vehicles dont frequently change fuel! Will modify the computers operation of the most common Cummins engine issues, but there are only 28,000 miles the. Displays without error codes key click the most cummins check engine light but no codes Cummins engine issues, but can save an amount. Replace some expensive fueling parts long before you hit that kind of mileage of status! From a friend to rule out the possibility of damaging your scanner on! For codes described above critical modules may malfunction due to a lack of sufficient power be repeated your engine... The plugs after we drove the car and they showed less carbon than bank 2 sensor! Telling the ECM how depressed the pedal, therefore not knowing what to do with engine speeds you dont change... Brazil, and Teskid in Mexico F * * ing codes but the stop light! Active status code stands for Electronic Control Module sensor fails, the next step of letter. 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