Jaguar XJ8 safe failure mode unresolved after ignition pack replacement and ABS module recommendation, additional checks for oxygen sensor and mass air flow sensor needed on Jaguar XJ8

Some Jaguar XJ8 owners report experiencing persistent safe failure mode issues even after replacing the ignition pack, prompting further checks of the oxygen sensor and mass air flow sensor. These owners have found that a faulty oxygen sensor can disrupt the engine's air-fuel mixture, leading to performance problems and triggering the safe failure mode. Additionally, a malfunctioning mass air flow sensor can adversely affect engine performance and activate warning lights. After replacing these components, some owners emphasize the importance of resetting the Engine Control Unit (ECU) to clear stored error codes and ensure proper system recalibration. Following these checks, many owners recommend taking the vehicle for a test drive to confirm if the issues have been resolved and the safe failure mode has been eliminated.