My 1994 Jaguar XJ6 has the code Fuel 39 that comes on often. I disconnect the negative battery cable and clear it. It comes on again in a few days. My repair manual says it is an EGR gas temperature sensor. Do I need to replace this, or is something else wrong?
Fuel 39 fault code
Nov 26, 2006
1 Replies
Dear Dingaling,
This code is set when your egr temp sensor is warmed by exhaust gasses when the vacuum solenoid is not energized by the engine computer.
EGR solenoid- Check at idle. Pull hose from EGR valve and check for vacuum. If vaccum is present - turn off engine, disconnect solenoid wire, re-test for vaccuum. If vacuum is present replace solenoid. If vacuum disappears after disconnecting wires you have a faulty engine computer.
EGR Valve - Sometimes stick or become lodged open. Common problems are internally leaking EGR gaskets. On earlier enigines heat shields were sandwiched between the EGR gaskets and were prone to rust through, bypassing the EGR.
EGR sensor - sorry can't help you there; never replaced one. Mounted on the bottom of the intake...
Solenoid test is simple but I suspect that you'll find burned through gaskets and/or heat shield.
Regards, Blake Dodson
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