I am working on a 1992 Jaguar xj6 Sovereign and it has fuel 37 dtc code. I was wonder if anybody could tell me what this code means and what to do to fix it. Thanks

 

Needs a egr solenoid.

 

Hi joego,

I have moved your post from the forum for the X350 to the forum for the XJ40, which is the Jaguar factory code for your 1992 XJ6.

Fuel Fail 37 indicates a short or open circuit in the EGR solenoid circuit. It does not necessarily mean that the solenoid is faulty. It could mean that the electrical connector is loose or corroded, or the wiring harness may be broken or shorted to ground.

I believe your '92 will be set up the same way as our '93: the EGR solenoid is mounted on top of the intake manifold at the firewall end, not far from the windshield wiper motor. If your car is equipped with Secondary Air Injection, an identical solenoid will be mounted on the front end of the intake manifold above the alternator. Below is a link to photos showing both solenoids:

Welcome to Jag-lovers - Members Photo Viewing Page

Please let us know what you find after inspecting the connector and wiring harness.

Cheers,

Don

 

joego:

Welcome to the forum. We like to be a really friendly place, so be sure to introduce yourself in the 'intros' section as well!

I had a FF37 that was indeed remedied by replacing the solenoid, but…. I would first follow Don's advice about checking and cleaning all of the connections. (Things get dirty after 22 years!) Then, I would CLEAR the code (by disconnecting the negative battery terminal - making sure you have the radio code!) for a minute or two, and then seeing if the code is flagged once again. I've "fixed" the occasional code simply by doing that.

Cheers,
Scott

 

FF37 means that the EGR solenoid CIRCUIT has a fault.
I had a car in the shop about 15 years ago that had a FF37 displayed.

I replaced the solenoid with a good used part 'borrowed' from another car. NO CHANGE!!!!!!!

I checked all the connectors and harness wiring (OK).

I swapped a 'known good' ECM into the car and the fault 'disappeared'.

I put the FAULTY ECM into the other car and THAT CAR had the FF37.

The ECM output to the EGR solenoid failed.

Be aware that the ECM checks the CIRCUIT for faults and NOT individual components.

The solenoid should have some continuity (30 ohms???) so check that first.

I uploaded the S_91 AJ6 engine diagnostic guide years ago. It will be in a large file download area. It has ALL the info you will need to fix the problem. It is a LARGE file .pdf (14mb).

bob gauff

 

After you have replaced the faulty solenoid, pull up the code on the VCM and then remove the fuse for the instrument cluster that is located in the center console. If you do this instead of disconnecting the battery you won't need a radio code or to reset the clock.

 

Thanks For the response I the car with the secondary air system the EGR solenoid ohms at 42 and the other one ohms 49. If you unplug them and put a ground and hot to them , I can blow though the solenoid so I think they are good. I could not get motorcarman pdf link to work. If he would send me a good link I would appreciate it

 

Hi joego,

Can we assume that without 12V applied, both solenoids block the passage of air? If so, your EGR solenoid is probably fine and the problem is elsewhere in the circuit.

Sometimes spurious DTCs are logged due to low battery power or loose or corroded grounds. Since the EGR solenoid is powered and grounded through the Engine Control Module (ECM), it would be worth cleaning the ground studs on the firewall behind the cylinder head, and the ground on the #3 intake manifold stud, which are used by the ECM. Go ahead and clean all the engine bay grounds while you're at it!

Welcome to Jag-lovers - Members Photo Viewing Page
Welcome to Jag-lovers - Members Photo Viewing Page
Welcome to Jag-lovers - Members Photo Viewing Page


See my other photo albums for the battery power connections, the grounds in the passenger cabin and trunk/boot, and servicing the fuseboxes.

Please keep us informed.

Cheers,

Don

 

I have no idea where the .pdf for the S_91 guide is actually located in the 'stickies'.
I uploaded it but I never needed to find it because I have it on my computer.
You might not have enough posts to access the download area or messaging privileges.

I cannot attach it to this post because it is around 14mb and the attachment limit is way less than that.

Keep posting and try again to download.

bob gauff