Having problems with your 1986 Jaguar XJSC ?

P0411 1995 jaguar xjs solution ?? - 1986 Jaguar XJSC

Posted / edited by AnonymousUser on : 26-09-2022

Answers :

Secondary air injection system incorrect downstream flow. this has to do with the air pump that is driven by one of the fan belts. if the check valve is not operating or the one way valve is burned through. it will trigger this code. check the valve on each side of the exhaust if v12(one on each part of manifold in L6) and remove the hose and start the engine. if exhaust flows through replace the valve/s. this can also be triggered by excessive moisture build up inside the pump and then freezing overnight not allowing the pump to rotate(pump).
Repair Help & Product Troubleshooting for 1986 Jaguar XJSC

Tips for a great answer:

- Provide details, support with references or personal experience .
- If you need clarification, ask it in the comment box .
- It's 100% free, no registration required.

Suggested Questions/Answers :

Loading ...

  • Start your question with What, Why, How, When, etc. and end with a "?"
  • Be clear and specific
  • Use proper spelling and grammar
all rights reserved to the respective owners || carrestorationshop.com || Terms of Use || Contact || Privacy Policy
Load time: 0.0086 seconds