2002 jaguar xj8 troubleshoot fault code p1121 throttle position sensor inconsistent with maf sensor high voltage?

The P1121 fault code indicates that the throttle position sensor (TPS) is sending inconsistent readings compared to the mass airflow (MAF) sensor, often due to a high voltage issue. To troubleshoot, start by inspecting the TPS and its wiring for any damage or loose connections. Additionally, check the MAF sensor for proper operation and any vacuum leaks in the intake system that could affect airflow readings. If necessary, testing or replacing the TPS and MAF sensor may resolve the issue.