Recently I had 2 trips with my car suddenly going into Fail Safe mode. Not Fun. Fault code shows as P-1121 which the manual lists as: “Pedal position sensor has announced its retirement”

I know the Pedal position sensor is unavailable but I googled the Denso # on the sensor and a partial match comes up for a Toyota/Lexus “Throttle Boby level sensor”. Clearly not the same part but the potentiometer portion looks identical.

The part is only $58.00 on Amazon so if it could be adapted to rebuild the PPS it would be a great option to having the throttle body rebuilt (screen shot below).

The photos are of my PPS.

Here is what I see:

-The potentiometer looks totally identical – 4 pin; identical casting, size shape, squared shaft.

-The inner cam (that connects to the throttle plate) is different – the Jag cam would need to be swapped

-The outer cam is also different. It looks like a mirror image so the potentiometer must rotate the opposite direction on the Toyota unit. Again, the cam would need to be switched out.

-Something that gives me caution is that the orientation of the shaft relative to the connector is different between our sensor and the Toyota sensor. I assume that the shaft could be rotated to match the Jag unit and then change out the front and back cams. But that is the big if.

- I think the potentiometer is the same. The only part numbers are on the cable cam for each unit. If Denso made different potentiometers, then there would likely be a part number on it.

Has anybody done this retrofit?

 

Interesting. Only way to tell is to try it out?

 

Over the years there has been a lot of discussion about this part. It would appear that Jaguar went to a lot of trouble to make sure that it couldn't be replaced, thus rendering the car useless. I assume they tied Denso into a legally binding agreement not to make anything similar. Fixing the problem required a complete new throttle body, at about $2,000 , but they may not be available now. The only other solution is to buy a throttle position sensor for a racing engine. They can be specified with the parameters you require. Cost is about $200.

 

the aj27 tps is like 10 bucks on ebay

p1121 is often the tps not the pps

 

Throttle body and throttle pedal from Robert rawle in South Wales UK Britain I had the same problem I replaced the complete throttle pedal from jaguar with the sensors I payed Ł55 for it and I found a throttle body sensor complete body on ebay for about Ł60 I had them checked and put in problem solved check tour maf sencor that went with me tryed ones on ebay new did not work I bought a densco original from jaguar that was about Ł70 to Ł80 put original on if you look on Google type in British jaguar specialists you will find different ones who will help and send around the world a good one is David manners UK I got a 2005 xjr hope this will help from Robert rawle

 

• Faulty electric throttle control actuator
• Throttle Position Sensor (TPS) that is out of adjustment or faulty
• Vacuum leaks in the intake manifold or related vacuum hoses
• Electrical issues such as loose, damaged, or corroded wires/connectors
• ECM/PCM that is faulty
  
• These are the cited causes of that code. You might find it worthy to check for vacuum leaks and of course, frayed wiring.