What Does It Mean?
This is a generic diagnostic trouble code (DTC) and applies to many OBD-II vehicles (1996-newer). This may include, but is not limited to, vehicles from Ford, Honda, Hyundai, Kia, Land Rover, Toyota, Volkswagen, etc. Although generic, the exact repair steps may vary depending on the year, make, model, and powertrain configuration.
If your OBD-II vehicle has stored a P062E code, it means that the Powertrain Control Module (PCM) has detected a performance issue with the fuel injector control circuit for engine bank 2. The second bank indicates the engine bank that does not contain cylinder number 1.
The fuel injector driver is an integral part of the PCM or the Electronic Fuel Injection controller (EFI) (if applicable).
The PCM controls the injector timing and pulse width by applying a ground pulse to the circuit at precisely the right moment. Since a constant supply of battery voltage is already present on the circuit (whenever the ignition is on), this triggers a precise spray of fuel from the pressurized fuel injector. This action occurs for each cylinder in sequential repetition.
In addition to controlling the fuel injection system, the PCM also monitors the feedback resistance of the individual fuel injector circuit to detect signs of malfunction. This can allow the PCM to detect a problem before it manifests as a driving issue.
If the PCM detects a fuel injector confirmation signal that is not within the expected parameters, a P062E code will be stored and a Malfunction Indicator Lamp (MIL) may be illuminated. The MIL illumination typically occurs upon the initial failure of such a code.
A typical fuel injector:
P062E Fuel Injector
How Severe is this DTC?
A stored P062E code, or any code related to fuel injection, should be classified as severe and investigated urgently.
What are some of the symptoms of the code?
Symptoms of a P062E fault code may include:
Reduced fuel efficiency
Engine misfires (with stored codes)
Hesitation or stalling during acceleration
Decreased engine performance
What are some of the common causes of the code?
Causes
of this code may include:
Open or shorted wiring or connector in the injector control circuit for bank 2
Faulty fuel injector
Defective PCM or EFI controller
Controller programming error
What are the P062E troubleshooting steps?
To accurately diagnose a stored P062E code, a diagnostic scanner, a digital volt/ohmmeter (DVOM), an oscilloscope, and a source of vehicle diagnostic information will be necessary. A scanner, like the Snap-On Modis, with a built-in DVOM and oscilloscope will work well for this task. Without an oscilloscope, it will be impossible to monitor the injector’s function and achieve a successful diagnosis.
I like to start my diagnosis by connecting the scanner to the vehicle’s diagnostic port and retrieving all stored codes and associated freeze frame data. Before clearing the codes, I write down 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 resets.
If the PCM enters readiness mode without the code resetting:
There is a strong chance you have an intermittent problem. If the code does not reset within a reasonable time, the condition may need to worsen before an accurate diagnosis can be made.
If the code resets immediately:
Perform a visual inspection of all associated wiring and connectors. You will want to replace any burnt or damaged components as necessary. Attempting to patch a fuel injector wiring harness often results in the PCM receiving an asymmetrical fuel injector driver confirmation signal and additional stored codes.
If the system wiring and connectors appear functional, use the oscilloscope to test each individual fuel injector. Consult your vehicle information source for diagnostic flowcharts, wiring diagrams, connector face views, connector pinout diagrams, and recommended testing procedures/specifications for the vehicle in question. Once the oscilloscope test leads are connected, note any inconsistencies in the waveform (voltage) pattern. Replace faulty fuel injectors as needed. If no anomalies are discovered in the fuel injector operation, proceed to the next step.
After testing the fuel injectors, disconnect all controllers from the injector control circuit and use the DVOM to test the system circuits. Replace wiring and/or connectors as necessary.
If all fuel injectors and system circuits are functioning as expected, suspect a controller failure or a controller programming error.
The fuel injector driver/controller is typically integrated into the PCM