OBD2 scanners have become indispensable tools for car owners and technicians alike, offering quick diagnostics of vehicle issues. Among these, Innova scanners are a popular choice for their user-friendliness and broad compatibility. However, questions arise about their capabilities, particularly when it comes to more complex scenarios like crash data and permanent Diagnostic Trouble Codes (DTCs). Let’s delve into what an Innova OBD2 scanner can and cannot do in these situations.
Permanent DTCs, as highlighted by the Bureau of Automotive Repair (BAR), are a specific type of trouble code designed to ensure that vehicle emissions systems are properly repaired. Unlike regular DTCs, Innova Obd2 Scanner Crash Data Remove attempts will be futile because these codes cannot be simply erased with a scanner or by disconnecting the battery. The only way to clear a Permanent DTC is to address the root cause of the problem. Once the issue is resolved, the vehicle needs to be driven through several drive cycles to allow the system monitors to re-run and confirm the fix. If the monitor runs successfully without detecting the fault again, the Permanent DTC will clear itself automatically. Think of it this way: the scanner can identify the problem, but fixing the car is the only way to truly resolve it and clear the permanent code.
Pending DTCs offer an earlier warning sign. These codes appear when a fault is detected intermittently or needs confirmation over two consecutive warm-up cycles. If the issue disappears and doesn’t recur within 40 warm-up cycles, the pending code will vanish from the system’s memory automatically. However, if the fault persists, a pending code can escalate into a full DTC, triggering the check engine light. An Innova scanner can read these pending codes, helping you catch potential problems early on.
History DTCs are records of past faults that have been resolved. They serve as a historical log of issues a vehicle has experienced. Clearing history codes is more variable. Some can be erased directly using an Innova scan tool, while others might need a double clearing procedure. Certain history codes are designed to clear only after a specific number of ignition or drive cycles under specific conditions, as outlined in the vehicle’s service manual. These codes are valuable for diagnosing intermittent problems, providing a history for technicians to analyze.
In conclusion, while an Innova OBD2 scanner is excellent for reading and clearing regular and history DTCs, and identifying pending issues, it is not designed to directly remove crash data or force-clear permanent DTCs before the underlying issue is fixed. The presence of permanent DTCs, especially those potentially related to crash events or safety systems, often necessitates professional diagnosis and repair. Understanding the different types of DTCs and the limitations of OBD2 scanners is crucial for effective vehicle maintenance and ensuring safety.
