Encountering a Check Engine Light (CEL) can be frustrating for any car owner. For those who prefer a DIY approach to car maintenance, an OBD2 scanner is an invaluable tool. The Cen-Tech 94217 OBD2 scanner, often compared to the Autel Geniscan GS400, is a popular choice for reading diagnostic trouble codes (DTCs). However, users sometimes face an unexpected hurdle: the dreaded “Erase Failure!” message when attempting to clear codes.
One common scenario involves a persistent P0420 code, indicating a potential issue with the catalytic converter or O2 sensor. While the Cen-Tech scanner may successfully read and display this code, the “Erase Failure!” message prevents users from clearing it after addressing the underlying problem, or simply to reset the CEL. This issue isn’t necessarily specific to Porsche vehicles or the P0420 code itself; it appears to be a limitation reported by users across various car makes.
The “Erase Failure!” message suggests a potential malfunction with the scanner’s ability to communicate the erase command to the vehicle’s computer. While the scanner can read data, the write function for clearing codes seems to be compromised in some cases. This could stem from software glitches within the Cen-Tech unit or compatibility issues with certain vehicle protocols.
For users facing this “Erase Failure!” problem with their Cen-Tech OBD2 scanner, several troubleshooting steps can be considered. Firstly, ensure the ignition is in the “ON” position, engine off, during the erase attempt. Trying the erase function multiple times might also occasionally resolve temporary glitches. If the issue persists, it may indicate a more fundamental limitation of the Cen-Tech 94217 model in certain code-clearing scenarios.
As an alternative, exploring OBD2 scanners from other manufacturers like Actron or investing in more advanced diagnostic tools like the Durametric (for Porsche vehicles) could provide a more reliable code clearing experience. While the Cen-Tech scanner offers an affordable entry point into DIY diagnostics, the “Erase Failure!” issue highlights a potential drawback to consider when choosing an OBD2 scanner for your automotive needs.
