Navigating car diagnostics can be puzzling, especially with older models straddling technology generations. For Volvo V70 T5 owners from the late 90s, like yourself facing post-cylinder head work error codes, the question of OBD2 compatibility and affordable diagnostic tools becomes crucial. Let’s delve into whether a budget-friendly OBD2 reader can effectively communicate with your 1998 Volvo V70 and clear those nagging codes.
It’s understandable to encounter conflicting information regarding OBD2 compliance for vehicles of this era. Some sources might suggest your ’98 V70 isn’t fully OBD2 compliant, perhaps recommending older, more specific readers. Others might assure you that standard OBD2 scanners will work just fine. Adding to the confusion, you’ve experienced partial OBD2 functionality with a previous Gendan USB interface, hinting at some level of compatibility.
The good news is that the 1998 Volvo V70 T5 is indeed equipped with an OBD2 port and generally adheres to the OBD2 protocol, particularly for essential diagnostic functions. While it’s true that certain advanced or manufacturer-specific features might not be universally accessible with every generic OBD2 reader, basic diagnostics – including reading and clearing engine fault codes – are typically within reach.
For your primary need – cancelling the error codes triggered after your cylinder head work – a cheap OBD2 reader stands a good chance of getting the job done. Models like the MaxiScan MS300, which you’ve already spotted, are often recommended as entry-level scanners capable of reading generic OBD2 codes and clearing them. These basic scanners communicate using the standard OBD2 protocols that your Volvo V70 likely supports for engine-related diagnostics.
While delving into Volvo Owners Club forums, you might have come across discussions about older Volvos utilizing flash codes, requiring DIY LED and paperclip setups. Fortunately, for the 1998 V70 with its OBD2 port, this archaic method is not necessary. You can confidently bypass the flash code approach and focus on utilizing the OBD2 port.
However, it’s worth noting the limitations of budget OBD2 readers. As you’ve observed, resetting the service light might be beyond the capabilities of such basic tools. Service light resets often require more advanced scanners with manufacturer-specific functions. The key-position-trip-counter method you attempted is also known to be inconsistent across all models and years.
Therefore, to directly answer your question: yes, plugging in a cheap OBD2 reader into your 1998 Volvo V70 T5 offers a reasonable expectation of obtaining intelligent diagnostic data and, crucially, clearing fault codes. For basic post-repair code clearing and general engine health checks, a scanner in the class of the MaxiScan MS300 should prove to be a worthwhile and economical tool. Just be aware of its limitations regarding service light resets and more in-depth system diagnostics.
