Cummins P2509 Engine Code – Disagnosis & Troubleshooting

When you scan your Dodge/Ram Cummins engine and receive a P2509 diagnostic code, it will read ‘ECM/PCM Power Input Signal Intermittent Code’. P2509 appears on Cummins engines when there is an electronic signal being sent to the ECM/PCM that is faulty or intermittent. Electronic signals are measured within parameters, and when the signal falls outside…

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The 5 Most Common ISB 6.7 Cummins Engine Problems

Article Updated: January 15, 2023 The 6.7 Cummins diesel engine is the latest of the B series engines. It’s a straight-six, 24 valve turbodiesel released for Dodge Ram trucks in 2007. The B6.7 Cummins still lives on in Ram 2500 and 3500+ trucks to this day. Though, it’s been through a few updates over the…

Cummins Engine Identification

Engine Dataplate  The engine dataplates show specific information about your engine. The engine serial number (1) and Control Parts List (CPL) (2) provide information for ordering parts and service needs.   Injection Pump Dataplate  Robert Bosch In-Line Dataplate Location The Cummins part number for the fuel pump-governor combination is located on the governor dataplate.

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5.9 12 Valve Cummins Diesel – Adjust Idle Speed

In this article, we discuss the 1994-98 Dodge Ram 12 valve Cummins Diesel Engine Idle Speed Adjustment. Towards the end of the article we include a helpful video detailing the steps to adjust the Cummins 5.9 12v idle speed. Correct Idle speed is: Automatic Transmission – in drive with AC on 750-800 RPM Manual Tansmission…

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Cummins Diesel 5.9 Engines – Killer Dowel Pin

5.9 12v Cummins Killer Dowel Pin Problems The 5.9L Cummins 12-valve diesel engines, manufactured between 1988 and 1998, feature a steel dowel pin that locates the front timing gearcase. Over time, this steel dowel pin can wobble out due to the constant heat cycles and vibrations of the engine. If (or when) the dowel pin works its…

Check / Replace Fuel Return Overflow Valve
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Check / Replace Fuel Return Overflow Valve

The Bosch VP44 Injection Pump Overflow Valve is located on the side of the Cummins injection pump. It is also used to connect the fuel return line (banjo fitting) to the fuel injection pump. Bosch VP44 Injection Pump Symptoms Fuel volume from the fuel transfer (lift) pump will always provide more fuel than the fuel injection pump…

Cummins Diesel 5.9 Liter B Series Engines
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Cummins Diesel 5.9 Liter B Series Engines

The Cummins Diesel 5.9 liter Engine 6BT, aka the Cummins “12-valve” was the first member of the “B” engine family to be used in a light truck vehicle. The 6BT used Robert Bosch GmbH fuel systems, injector, and VE rotary pump and P7100 inline injection pumps. Some early 6BT’s were supplied with CAV rotary pumps…

5.9 Cummins 24V Diesel Engine: 53 Block Problems
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5.9 Cummins 24V Diesel Engine: 53 Block Problems

The Cummins “53” Block was used in Cummins 24 valve ISB diesel engines from 1998.5-2002. Manufactured by Brazilian company, TUPY. The “53” block casting has thin water jacket walls that are susceptible to cracking. With coolant cavitation, corrosion, coolant pressure in the block, frequent or heavy towing they may crack, causing a loss of coolant. Failing to…

The 4 Most Common Cummins 5.9L Engine Problems
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The 4 Most Common Cummins 5.9L Engine Problems

The Cummins 5.9L “B-Series” diesel engine was produced from 1984 up until 2007. First generation versions were named the 6BT but also commonly referred to as the 12v, or 12-valve. Each cylinder had 2 valves, hence the name 12-valve. Midway through 1998, the 6BT was replaced with the ISB, which stands for “Interact System B”….

Cummins P1693 Engine Code – Diagnosis & Troubleshooting
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Cummins P1693 Engine Code – Diagnosis & Troubleshooting

If you Google P1693, you will probably see something that reads “Turbo Charge Control Circuit Malfunction”. However, on Cummins turbo diesel engines, this code has nothing to do with the turbocharger.  P1693 is considered the “companion code”. It is triggered when the powertrain control module (PCM) detects a code that us not actually associated with the…