Has anyone experienced this? The wife's 2005 STR randomly shuts down while driving. After pulling off the road for 10-15 minutes it starts up and is fine, but it is pretty scary when it happens on the freeway and you have no power.

 

The nearest I've heard was someone whose knee turned out to be knocking the ignition switch, thus turning the car off.

There's a fair chance the car has logged a special code (P1582) as a clue but it needs a special tool to decode it (IDS/SDD).

Possibly it's a sudden air leak when something flexes/jogs so you could go hunting for that. (Don't expect it to be trivial to find.) Start with fuel trims.

 

Do you have any perm or pending codes/ A CEL? Does it flash red and give you a message before shutting down?

Just a very offhand guess is that some temp is being misread and the car is shutting down to protect itself. Does this only happen one time and after it turns off and you wait 1o- 15 minutes it does not happen again during the day?

What happens if you try to immediately start it after it shuts down? Does the engine try to turn over or what?

Tom in Dallas/Plano
05 S-type 3.0 119k

 

Hi Tom, and thanks for the reply. First, the dash lights come on. Then I notice the car will not respond to the gas pedal, but the motor is still running. I pull over to a stop, put it in neutral and the motor responds to the gas pedal. But when I put it in Drive, nothing. If I restart it immediately, the motor fires up but the car won't budge. One note I should have mentioned previously is the car was originally a flood car (10 years ago). But the only anomaly that results is this sudden death thing. Some years it runs all year long without this crazy thing. A mechanic buddy suggested it might be an internal computer on the fritz, and that only a Jag Dealer with their diagnostic platforms would be able to isolate the fault. That's my last resort. But thanks for all your suggestions!!!

 

At first it sounded electrical to me. Like you lost the connection between the gas pedal, eco and throttle body. Floods do nasty things to connectors and corrosion might be the issue. But corrosion does not self heal itself. Self healing anomalies usually point to a faulty electrical component that overheated. or a lost network connection that needs to be reset by cycling power

 

Agree with that. Sounds like something the TCM might need to read and cannot. Same for the ECU. If he had the SDD he could do pinpoint testing. A Jag diagnostic should locate the trouble in the CAN, You would think he would have some sort of codes and I have not heard of the lights coming on and then stopping the car.

TBB

 

Thanks a ton guys! From your recommendations/comments it sounds like I need some serious diagnostic work by a Jag dealer. Have never taken any of my cars to a dealer for service since my early air-cooled 911 days. But it looks like that's the only alternative for this mystical issue since none of the independent Jag service shops in my area have invested in the requisite sophisticated diagnostic equipment. Thanks to you all...this is truly a wonderful forum!

 

SOLVED!!! Took the wife's STR to Chantilly Jaguar. The Service Manager said he needed the car for 2 weeks for diagnosis, at $200 per hr. I declined. Bought a BlueDriver Scanner and tried the 1st option, replace the gas cap. Ordered a new one, but decided to give the old one a good cleaning. Bottom line, that did the trick! The gas cap was a bit dirty around the neck, so there wasn't sufficient vacuum in the fuel system - which is why it would frequently go into limp mode. What a simple solution!!! Thanks for all your suggestions and comments guys!

 

Lets hope that works, but generally you get a CEL on that and it does not go into limp mode and does not usually create the type of problem you described..
K : P0455. Gross Leak Detected.

K1 : CHECK FUEL FILLER CAP FITMENT AND CONDITION OF PIPES AND CONNECTORS.
1. Ensure that the fuel filler cap is correctly installed and tightened. (minimum 3 clicks)
2. Check the condition of all accessible pipes and connectors in the vapor line.

Are all pipes and connectors in good condition?

Yes
Suspect concern with -
1. Blockage in vapor line. (engine to fuel tank)
2. EVAP/purge valve stuck closed.
3. Fuel tank assembly.
4. carbon canister assembly.

No
REPAIR as necessary. CLEAR the DTC. Carry out a full Evap system monitor drive cycle, recheck DTCs. For additional information, see 'diagnostic drive cycles'.

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Diagnostic Drive Cycles
Following the setting of a DTC, the appropriate repairs must be carried out, and the normal operation of the system checked. This will be done by performing a series of drive cycles which will enable the vehicle to operate the Evaporative Emissions system as a function check. The following drive cycles cover the use of the Jaguar approved diagnostic system, GDS510 instrument, and a test with no additional equipment, where possible.

Flow check monitor drive cycle conditions (non-Fed)

NOTE:
These conditions must be satisfied before the test is commenced.
This drive cycle should be performed following rectification work on the system.
- Make sure the fuel tank is between one quarter and three quarters full. (adding fuel will increase vapor generation; the diagnostic will not run if the vapor concentration is too great)
- Make sure the ambient air temperature is above -5 degrees C. (23 degrees F)

Flow check monitor drive cycle (non-Fed)
- Drive the vehicle for a minimum of 15 minutes, avoiding severe or excessive fuel movement.
- Avoiding excessive fuel movement, gently bring the vehicle to rest. (coast to a stop)
- Allow the vehicle to idle for two minutes.

Full Evaporative system monitor drive cycle conditions

NOTE: These conditions must be satisfied before the test is commenced.
- Make sure the fuel filler cap is correctly fitted. (minimum three clicks)
- Clear the DTCs. (perform a code clear, even if no codes are present. This will reset TIDs)
- Make sure the fuel tank is between one quarter and three quarters full. (adding fuel will increase vapor generation; the diagnostic will not run if the vapor concentration is too great)
- Drive the vehicle for a minimum of two minutes, and until fully warm. (temperature gauge just below mid-point)
- Make sure that the purge valve is operating, either by touch, sound, or using datalogger. (purge vapor management valve-duty cycle)
If the purge is not active, perform the 'Drive cycle for green PCM' in this section.

Full Evaporative system monitor drive cycle
- Drive the vehicle to a suitable road where the test can be carried out, switch off the ignition.
- Leave the ignition switched off for 30 seconds.
- Restart the engine, accelerate briskly to 50 miles per hour (80 Kilometers per hour) making sure that the engine speed reaches at least 3500 RPM for a minimum of five seconds.

40 thou test, using the Jaguar approved diagnostic system
- Avoiding high engine loads, drive the vehicle steadily between 40 and 60 miles per hour. (64 and 97 Kilometers per hour) Using the Jaguar approved diagnostic system, monitor the Evap valve duty cycle (Purge vapor management valve-duty cycle) CCV status (Canister close valve-vapor recovery system) and the FTPS (Fuel tank pressure-vapor recovery system) The Jaguar approved diagnostic system will give an indication when the test is active. Dependant on the level of vapor concentration, it may take up to 30 minutes for the test to initialise. (vapor concentration cannot be measured using the Jaguar approved diagnostic equipment) When the test has initialised, (CCV closed) it will take up to 90 seconds to complete. Avoid excessive fuel movement while the test is active.

20 thou test, using the Jaguar approved diagnostic system
- Continue driving the vehicle steadily between 40 and 60 miles per hour. (64 and 97 Kilometers per hour)avoiding high engine loads for a further 10 minutes.
- Avoiding excessive fuel movement, gently bring the vehicle to rest (coast to a stop)
- Allow the vehicle to idle for 2 minutes.
- Use the Jaguar approved diagnostic system to monitor the Evap valve duty cycle (Purge vapor management valve-duty cycle) CCV status (Canister close valve-vapor recovery system) and the FTPS (Fuel tank pressure-vapor recovery system) The Jaguar approved diagnostic system will give an indication when the test is active. When the test has initialised, (CCV closed) it will take up to 90 seconds to complete.

If the 20 thou test has not run, it is likely that the vapor concentration in the purge system is too great. In this case, carry out the following -
- Drive the vehicle steadily for a further 30 minutes, avoiding excessive fuel movement.
- Avoiding excessive fuel movement, gently bring the vehicle to rest (coast to a stop)
- Allow the vehicle to idle for 2 minutes.
- Use the Jaguar approved diagnostic system to monitor the Evap valve duty cycle (Purge vapor management valve-duty cycle) CCV status (Canister close valve-vapor recovery system) and the FTPS (Fuel tank pressure-vapor recovery system) The Jaguar approved diagnostic system will give an indication when the test is active. When the test has initialised, (CCV closed) it will take up to 90 seconds to complete.

If the 20 thou test fails to run a second time, repeat the entire test.
- Check for DTCs. Rectify as indicated.

40 thou test, using GDS510
- Avoiding high engine loads, drive the vehicle steadily between 40 and 60 miles per hour. (64 and 97 Kilometers per hour)
- When the test has initialised, using the GDS510, monitor the Evap valve duty cycle, CCV status, and the FTPS (the GDS510 will give an indication when the test is active)
- When the test has initialised, (CCV closed) it will take up to 90 seconds to complete.
- To make sure that the test has completed, TID 08 in mode 6 must be checked. (if the test has not completed, this TID will display 0. Any other value indicates test completion)
- If the test did not complete, repeat the test.

20 thou test, using GDS510
- Continue driving the vehicle steadily between 40 and 60 miles per hour. (64 and 97 Kilometers per hour)avoiding high engine loads for a further 10 minutes.
- Avoiding excessive fuel movement, gently bring the vehicle to rest (coast to a stop)
- Allow the vehicle to idle for 2 minutes.
- When the test has initialised, using the GDS510, monitor the Evap valve duty cycle, CCV status, and the FTPS (the GDS510 will give an indication when the test is active)
- When the test has initialised, (CCV closed) it will take up to 90 seconds to complete.
- To make sure that the test has completed, TID 06 in mode 6 must be checked. (if the test has not completed, this TID will display 0. Any other value indicates test completion)
- If the test did not complete, repeat the test.
- If the 20 thou test has not run, it is likely that the vapor concentration in the purge system is too great. In this case, drive the vehicle steadily for a further 30 minutes, avoiding excessive fuel movement, then repeat the test.
- Check for DTCs. Rectify as indicated.

40 thou and 20 thou tests using no additional equipment
The test procedure and conditions are as for the Jaguar approved diagnostic system or GDS510, but no confirmation of the test having run is possible without the use of one of these instruments. The DTC will be set if the fault still exists, but the possibility exists that the conditions for the test to run may not have been met, in which case, the DTC may not be set until the owner reproduces the conditions in which the fault originally occurred.

Drive cycle for 'green' PCM
- To enable the PCM to re-learn fuelling adaptions.

NOTE: This procedure should be performed whenever the vehicle battery has been disconnected.

Due to component tolerance and wear during the normal running of a vehicle, fuelling and air requirements for an engine will vary over time. The PCM has the ability to adjust for this variation by 'learning' the level of compensation that is required. (These compensation values are referred to as adaptions)

If the vehicle battery is disconnected, all adaptions held within the PCM will be lost (i.e., set to Zero) The PCM is then referred to as 'green'. To enable the vehicle to function correctly, the PCM must 'relearn' these adaptions.

There are four areas or sites that need to be relearnt.
- Allow the vehicle to idle until fully warm. (temperature gauge just below mid-point)
- Allow to idle for a further three minutes, minimum.
- Drive the vehicle with the air conditioning OFF on a level road using a constant throttle, or speed control if fitted, for at least one minute in the following gears, at the stated engine speeds for each of the sites below.

The vehicle speed is for guidance only. DO NOT use the vehicle speed as the target to set adaptions.

'Green' PCM drive cycle chart. Site 1



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'Green' PCM drive cycle chart. Site 2



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'Green' PCM drive cycle chart. Site 3



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'Green' PCM drive cycle chart. Site 4



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Bring the vehicle to rest, allow to idle for one minute.

WARNING: THE FOLLOWING TESTS MAY INVOLVE PARTS WHICH ARE HOT.

If sufficient adaptions have occurred, the Evap valve should now be operating. This can be verified manually by either touching or listening to the valve. By touching the Evap valve, it should be possible to feel the valve switching. Listening to the Evap valve is best done using a workshop stethoscope, through which it should be possible to hear the valve operating.

TBB

 

+1 on that! You can see the normal response to a problem with the EVAP system (P0455), on page 40:

http://www.jagrepair.com/images/Auto..._OBD_II_R2.pdf


Basically, that is a fairly low-level fault. After 2 drive cycles in a row with the fault present, the Check Engine Light illuminates. Canister purge and adaptive fuel metering is inhibited, which are relatively minor.

Compare that to say P0171 for example, on page 22. This is a higher priority fault, and one of the responses is to limit maximum engine speed.

I didn't see any fault codes that shut off the engine, so I'm thinking whatever had previously acted up for you may still be lurking.

 

+1

 

Please post back if it stays fixed. As you can see from the above posts that even running without any gas cap won't cause the car to shut down. Only set a check engine light.
But hopefully it will stay fixed.
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