Technical Description of OBD-II Trouble Code
Performance Issue in Fuel Injector Driver Circuit for Bank 2
What does that signify?
This is a generic diagnostic trouble code (DTC) that is applicable to many OBD-II vehicles (1996-newer). This includes vehicles from Ford, Honda, Hyundai, Kia, Land Rover, Toyota, Volkswagen, etc. Although it is a generic code, the specific repair steps may vary depending on the year, make, model, and powertrain configuration.
If your OBD-II vehicle has stored a code P062E, it means that the powertrain control module (PCM) has detected a performance issue with the fuel injector driver circuit for engine bank 2. Bank two refers to the bank of the engine that does not contain the #1 cylinder.
The fuel injector driver is an essential component of the PCM or the electronic fuel injection (EFI) controller (if applicable).
The PCM controls the timing and pulse width of the injectors by applying a ground pulse to the circuit at the precise moment. Since there is already a constant supply of battery voltage on the circuit (whenever the ignition is on), this triggers a precise spray of fuel from the pressurized fuel injector. This process occurs sequentially for each cylinder.
In addition to controlling the fuel injection system, the PCM also monitors the individual fuel injector circuit feedback resistance for any signs of malfunction. This allows the PCM to detect a problem before it manifests as a drivability issue.
If the PCM detects a fuel injector confirmation signal that does not meet the expected parameters, a code P062E will be stored and a malfunction indicator lamp (MIL) may illuminate. MIL illumination usually occurs when this type of code is initially detected.
A typical fuel injector:
What is the severity of this DTC?
A stored code P062E, or any other code related to fuel injection, should be considered severe and investigated promptly.
What are some of the symptoms of the code?
Symptoms of a P062E trouble code may include:
What are some of the common causes of the code?
Possible causes for this code may include:
What are some P062E troubleshooting steps?
To accurately diagnose a stored code P062E, you will need a diagnostic scanner, a digital volt/ohmmeter (DVOM), an oscilloscope, and a source of vehicle diagnostic information. A scanner with a built-in DVOM and oscilloscope, such as the Snap-On Modis, is recommended for this task. Without an oscilloscope, it will be impossible to monitor injector function and achieve a successful diagnosis.
I prefer to begin the diagnosis by connecting the scanner to the vehicle diagnostic port and retrieving all stored codes and related freeze-frame data. Before clearing the codes, I make a note of this information for reference. After clearing the codes from the PCM, I test-drive the vehicle until the PCM enters readiness mode or the code is reset.
If the PCM enters readiness mode without the code being reset:
It is likely that there is an intermittent condition. If the code fails to reset within a reasonable period of time, the condition may need to worsen before an accurate diagnosis can be made.
If the code is immediately reset:
I perform a visual inspection of all related wiring and connectors. I replace any burned or damaged components as necessary. Attempting to patch a fuel injector wiring harness often results in the PCM receiving a distorted fuel injector driver confirmation signal and additional codes being stored.
If the system wiring and connectors appear to be functional, I use the oscilloscope to test each individual fuel injector. I consult the vehicle information source for diagnostic flow charts, wiring diagrams, connector face views, connector pin-out charts, and recommended testing procedures/specifications for the specific vehicle. Once the oscilloscope test leads are connected, I take note of any irregularities in the voltage pattern. I replace defective fuel injectors as needed. If no abnormalities are found in fuel injector operation, I proceed to the next step.
After testing the fuel injectors, I disconnect all controllers from the injector driver circuit and use the DVOM to test the system circuits. I replace any wiring and/or connectors as necessary.
If all fuel injectors and system circuitry are functioning as intended, I suspect controller failure or a controller programming error.
