Technical Description of OBD-II Trouble Code
Performance Issue in Internal Control Module A/D Processing
What is the meaning of this?
This generic powertrain diagnostic trouble code (DTC) is commonly found in many OBD-II vehicles, including those from Ford, Dodge, Duramax, GMC, Chevrolet, Isuzu, Ram, etc.
When a code P060B is stored, it indicates that the powertrain control module (PCM) has detected an internal processor error in a specific set of processors known as A/D. Other controllers may also detect a PCM processor performance error and store a code of this type.
The processors responsible for monitoring the internal control module are accountable for various self-test duties and overall module control. They constantly monitor the temperature of the internal controller, especially the PCM, as well as multiple input and output signals.
Whenever the ignition is on and the PCM is powered, numerous self-tests are initiated by the internal controller. In addition to running self-tests, the controller area network (CAN) also compares signals from each individual module to ensure proper functioning. 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 P060B will be stored and the 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:
How severe is this DTC?
Codes related to internal control module processors should be considered severe. A stored code P060B 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 P060B trouble code may include:
What are some of the common causes of the code?
Possible causes for this code may include:
What are some P060B troubleshooting steps?
Diagnosing a code P060B can be a challenge, 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 P060B.
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 will be more difficult to diagnose. If the code is reset, continue with the following preliminary tests.
When diagnosing a P060B, 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.
Visually inspect system controllers for signs of water, heat, or collision damage. Any damaged controller, especially due to water, 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. In some cases, reprogrammed controllers may be available through aftermarket sources. Other vehicles/controllers will require on-board reprogramming that can only be done through a dealership or other qualified source.
