2000 Jaguar S-Type

Check the wiring to the DPFE !

EXHAUST GAS RECIRCULATION (EGR)
To lower oxides of nitrogen (NOx) exhaust gas emissions, an Exhaust Gas Recirculation (EGR) system is used on S-Type (V6) and XJR.
S-Type (V6)
EGR system consists of a vacuum-operated EGR valve, EGR Vacuum Regulator (EVR), Differential Pressure Feedback EGR (DPFE) sensor and exhaust gas feedback pipe with internal orifice. See Fig. 8 . Exhaust gas from the right bank exhaust manifold flows through the feedback pipe to the EGR valve. The EGR vacuum regulator controls the vacuum signal applied to the EGR valve. The differential pressure feedback EGR sensor is connected to the feedback pipe with hoses connected to either side of the orifice. The difference in pressure between each side of the orifice is measured by the DPFE sensor, which sends a signal to the PCM. The PCM provides a pulse-width modulated signal to the EGR vacuum regulator, based on inputs from the DPFE sensor and other sensors.
Fig. 8: Identifying EGR Components - S-Type (V6)