Error Code P062D is defined as Fuel Injector Driver Circuit Performance Bank 1. This is a generic trouble code, meaning it applies to all vehicles equipped with the OBD-II system. This typically shows up in vehicles from Ford, Honda, Kia, Land Rover, Toyota, Volkswagen, etc. Specifications on the definition, troubleshooting, and repairs, of course, vary from one make and model to another.
Error Code P062D means the PCM (powertrain control module, also known as ECM or engine control module in other vehicle makes) has determined a performance problem with the fuel injector driver circuit for engine Bank 1. Bank 1 pertains to the bank of the engine that contains the number one cylinder.
The fuel injector driver plays an important part in the PCM or EFI (electronic fuel injection) controller (if applicable).
By applying a ground pulse to the circuit at exactly the right time, the PCM controls the injector timing and pulse width. Since there is a constant supply of battery voltage on the circuit (when the ignition is on), this activates a precise spray of fuel from the pressurized fuel injector. This action happens in each cylinder in sequential repetition.
Aside from controller the fuel injection system, the PCM also monitors fuel injector circuit feedback resistance for signs of malfunction. This allows the PCM to detect problem way before it becomes a drivability issue.
If the PCM sees a fuel injector confirmation signal outside of the expected parameters, then Error Code P062D will be stored, and simultaneously activate the Check Engine light.
- Engine misfire
- Hesitation or stalling upon acceleration
- Decreased engine performance
- Increase in fuel consumption
- Defective fuel injector
- Open or shorted connector or wiring in the bank 1 injector driver circuit
- Bad PCM
- Controller programming error
How to Check
To diagnose this code more accurately, make sure you have a diagnostic scanner, DVOM (digital volt/ohmmeter), an oscilloscope, and a source of vehicle diagnostic information. Scanners like Snap-On Modis comes with a built-in DVOM and oscilloscope will work well. Without the oscilloscope, it will be impossible to diagnose this code, as you will be unable to monitor the injector function.
Start the diagnosis by connecting the scanner to the vehicle diagnostic port, get all stored codes and other related freeze-frame data. You need to write down this information, just in case the problem proves to be intermittent. After writing down all pertinent information, clear the codes and then take the vehicle for a test drive to see if the code resets, or if the PCM enters readiness mode.
When the PCM enters readiness mode without the code being reset:
This could be an intermittent condition. If the code fails to reset within a reasonable time, you may need for the condition to worsen before you can accurately get an accurate diagnosis.
If the code resets immediately:
You can proceed with your diagnosis. Conduct a visual inspection of all related connectors and wirings. You need to replace damaged components, especially the burnt ones. Trying to patch a fuel injector wiring harness can cause the PCM to receive a skewered fuel injector driver confirmation signal, which will lead to additional codes.
If the system connectors and wirings look good, proceed on testing each individual fuel injector by testing them using the oscilloscope. Refer to your vehicle information for diagnostic flow charts, connector pin-out charts, connector face views, and the recommended testing procedures/specifications for the vehicle in question. After connecting the oscilloscope test leads, note any inconsistencies in the wave (voltage) pattern. Any proven defective fuel injectors must be replaced. If no abnormalities are found in the fuel injector operation, then proceed to the next step.
After testing the fuel injectors, disconnect all controller from the injector driver circuit, and then use the DVOM to test system circuits. Replace connectors and wirings as necessary.
If all fuel injectors and system circuitry are working fine, then you can suspect a defective controller, or controller programming error.
The fuel injector driver/controller is typically integrated into the PCM
How to Fix
- Repair or replacement of damaged connectors or wirings
- Replacement of fuel injectors
- Repair or replacement of defective controller
- Controller reprogramming
Error Code P062D along with other fuel injection-related code must be classified as severe and must be addressed as soon as possible.