Having problems with your 1991 Plymouth Voyager ?
How do I read the codes on the 3.0L Mitsubishi motor?
Built-in diagnostics are accessed by switching the ignition on-and-off 4 or 5 times ( without starting the engine, of course ), and leaving it on. This will trigger the CHECK ENGINE light to flash a series of code(s) indicating the problem(s). The codes can be found elsewhere online.
With a scan tool under the hood
Repair Help & Product Troubleshooting for 1991 Plymouth Voyager
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.