Technical Description of OBD-II Trouble Code
Performance Issue with Internal Control Module Main Processor
What does this mean?
This generic powertrain diagnostic trouble code (DTC) is commonly found in many OBD-II vehicles, including those from Fiat, Ford, Mazda, Lincoln, Chevy, etc.
When code P060C is stored, it indicates that the powertrain control module (PCM) has detected an error in the main processor’s performance. Other on-board controllers may also detect a similar error and store a code of this type.
The internal control module monitoring processors are responsible for various self-test duties and overall accountability of the internal control module. Specific controller processors constantly monitor the temperature of the internal controller (especially PCM), as well as multiple input and output signals.
Whenever the ignition is on and the PCM is energized, numerous internal controller processing self-tests are initiated. In addition to running internal controller self-tests, the controller area network (CAN) also compares signals from each individual module to ensure proper functioning of each controller. These tests are performed simultaneously.
If the PCM detects a discrepancy between any of the on-board controllers, indicating an internal processor error, a code P060C will be stored and a malfunction indicator lamp (MIL) may illuminate. Depending on the perceived severity of the malfunction, multiple failure cycles may be required for MIL illumination.
Photo of a PCM with the cover removed:
What is the severity of this DTC?
Codes related to internal control module processors should be considered severe. A stored code P060C could lead to a no-start condition or serious drivability issues, occurring suddenly and without warning.
What are some of the symptoms of the code?
Symptoms of a P060C trouble code may include:
What are some of the common causes of the code?
Possible causes for this code may include:
What are some P060C troubleshooting steps?
Diagnosing a code P060C can be challenging, even for experienced technicians. Reprogramming may also be necessary for replacing a defective controller and completing a successful repair.
If there are ECM/PCM power supply codes present, they should be addressed before attempting to diagnose a P060C.
Prior to declaring an individual controller defective, several preliminary tests can be performed. These tests require a diagnostic scanner, a digital volt/ohmmeter (DVOM), and reliable vehicle information.
Connect the scanner to the vehicle diagnostic port and retrieve all stored codes and freeze frame data. Record this information in case the code is intermittent. After recording the information, clear the codes and test drive the vehicle until the code is reset or the PCM enters readiness mode. If the PCM enters readiness mode, the code is intermittent and more difficult to diagnose. In some cases, the condition that caused the P060C to be stored may need to worsen before a diagnosis can be made. If the code is reset, continue with the following preliminary tests.
When diagnosing a P060C, information is crucial. Search for technical service bulletins (TSB) that match the stored code, vehicle (year, make, model, and engine), and exhibited symptoms. The right TSB may provide diagnostic information that can greatly assist in the diagnosis.
Use the vehicle information source to obtain connector face views, connector pin-out charts, component locators, wiring diagrams, and diagnostic flow charts related to the code and vehicle in question.
Use the DVOM to test controller power supply fuses and relays. Replace blown fuses as necessary. Fuses should be tested with the circuit loaded.
If all fuses and relays appear to be functioning properly, visually inspect the controller-related wiring and harnesses. Also check chassis and engine ground junctions. Use the vehicle information source to find ground locations for related circuits. Use the DVOM to test ground integrity.
Inspect system controllers for signs of water, heat, or collision damage. Any damaged controller, especially from water exposure, should be considered defective.
If controller power and ground circuits are intact, suspect a defective controller or a controller programming error. Controller replacement will require reprogramming. Aftermarket sources may offer reprogrammed controllers for some vehicles. Other vehicles/controllers may require on-board reprogramming that can only be done through a dealership or qualified source.
