What does it mean?
This generic powertrain diagnostic trouble code (DTC) generally applies to many OBD-II vehicles. This may include, but is not limited to, vehicles from Dodge, Ram (Cummins), Ford, Chrysler, etc.
When a P061E code is stored, it means the Powertrain Control Module (PCM) has detected an internal performance error in the brake signal circuit. Other controllers may also detect an internal PCM performance error (with the engine speed monitoring system) and contribute to the storage of a P061E.
The internal control module monitoring processors are responsible for various controller self-test tasks and the overall responsibility of the internal control module. The input and output signals of the engine air mass calculation system are self-tested and are constantly monitored by the PCM and other associated controllers. The Transmission Control Module (TCM), the Traction Control System Module (TCSM), and other controllers are subject to interaction with the brake signal circuit.
The brake signal circuit (also called stop light) is monitored (by the PCM and other controllers) using the input signals from the brake pedal sensor. The brake signal circuit is an integral part of several control systems used in OBD-II vehicles. The cruise control and the transmission torque converter lockup system are just a few of the most common of these systems. The PCM and other controllers receive input signals from the stop light switch and use these inputs to activate and deactivate various functions accordingly. Brake signal inputs are generally limited to ON or OFF distinctions.
Whenever the ignition is turned on and the PCM is powered up, self-tests of the internal engine brake signal circuit are initiated. In addition to running internal controller self-tests, the Controller Area Network (CAN) also compares the signals from each individual module to ensure all controllers are functioning correctly. These tests are performed simultaneously.
If the PCM detects an internal error in the brake signal circuit, a P061E code will be stored and a Malfunction Indicator Lamp (MIL) may illuminate. Several ignition cycles (with a failure) may be required for the MIL to illuminate.
Powertrain Control Module PCM
How severe is this DTC?
Internal control module processor codes should be classified as severe. A stored P061E code could result in erratic operation of the transmission torque converter lockup or an inoperative cruise control (speed control).
What are some of the symptoms of the code?
Symptoms of a P061E fault code may include:
- Harsh or delayed shifting (transmission)
- Engine stalling at idle (while driving)
- Inoperative brake lights (stop lights)
- Lack of torque converter lockup may damage the transmission
What are some of the common causes of the code?
Causes of this code may include:
- Faulty brake light switch
- PCM programming error or faulty PCM
- Open or shorted circuit or connectors in the CAN harness
- Insufficient control module ground
- Open or shorted circuits between the brake switch and the PCM
What are the P061E troubleshooting steps?
Even for the most experienced and well-equipped professional technician, diagnosing a P061E code can be very challenging. There is also the issue of reprogramming. Without the necessary reprogramming equipment, it will be impossible to replace a faulty controller and perform a successful repair.
If ECM/PCM power codes are present, they will obviously need to be corrected before attempting to diagnose a P061E. Additionally, if brake light switch/signal codes are present, these should be diagnosed and repaired first.
Follow the manufacturer’s recommendations for testing the brake light switches. Replace faulty components as necessary.
Several preliminary tests can be performed before declaring an individual controller faulty. A diagnostic scanner, a digital volt/ohmmeter (DVOM), and a reliable vehicle information source will be required. An oscilloscope may also prove useful.
Connect the scanner to the vehicle’s diagnostic port and retrieve all stored codes and freeze frame data. You will want to note this information, just in case the code proves to be intermittent. After recording all relevant information, clear the codes and test drive the vehicle until the code resets or the PCM enters readiness mode. If the PCM enters readiness mode, the code is intermittent and will be more difficult to diagnose. The condition which caused the P061E to be stored may even need to worsen before a diagnosis can be made. If the code resets, continue with this short list of preliminary tests.
When trying to diagnose a P061E, information can be your best tool. Search your vehicle information source for Technical Service Bulletins (TSBs) that parallel the stored code, the vehicle (year, make, model, and engine), and the symptoms presented. If you find the right TSB, it can provide diagnostic information that will help you significantly.
Use your vehicle information source to obtain connector face views, connector pinout diagrams, component locators, wiring schematics, and diagnostic flowcharts related to the code and the specific vehicle.
Use the DVOM to test the controller’s power fuses and relays. Test and replace blown fuses as needed. Fuses should be tested with the circuit loaded.
If all fuses and relays appear to be working as expected, a visual inspection of the wiring and harnesses related to the controller is necessary. You will also want to check the chassis and engine ground junctions. Use your vehicle information source to obtain ground locations for the related circuits. Use the DVOM to test ground integrity.
Visually inspect the system controllers for signs of water, heat, or collision damage. Any damaged controller, especially by water, should be considered faulty.
If the controller’s power and ground circuits are intact, suspect a faulty controller or a controller programming error. Replacing the controller will require reprogramming. In some cases, you can purchase pre-programmed controllers through aftermarket sources. Other vehicles/controllers will require onboard reprogramming that can only be performed by a dealer or another qualified source.
Unlike most other codes, P061E is likely caused by a faulty controller or a controller programming error.
Test the system ground integrity by connecting the DVOM’s negative test lead to ground and the positive test lead to battery voltage.