The old check engine light

2010LR4 · 22nd April 2021, 07:46 AM

New owner, long time lurker first time poster

I’ve just spent a heap of $’s on fixing up the new purchase: high pressure fuel pump, suspension compressor, servicing, etc. And literally on the way home from picking it up the check engine light goes on. I looked up the forums and found various causes possible but I went with the simplest first - checked the caps. Took the fuel cap on and off, the same with the others in the engine bay. The brake cap turned an extra click. The engine light off on next start - Yay. But this morning it’s on again - boo.
Was it a coincidence it went off after mucking around with caps? Does the fuel filler cap work itself loose again?
Thoughts?

josh.huber · 22nd April 2021, 07:57 AM

Need a code reader sorry mate. Could be inlet manifolds or a loose wire.

**scarry** · 22nd April 2021, 08:13 AM

What he said^^^^^^^^

Without a code reader,you will be guessing,and wasting time.

**Eric SDV6SE** · 22nd April 2021, 08:45 AM

Codes, we need codes man!

As far as i know none of the caps will trigger any form of engine check light.

Check back with whomever serviced it, they should have checked and road tested the vehicle before handing it back to you.

**101RRS** · 22nd April 2021, 11:20 AM

Yes was coincidence - restart resets the the system until it detects the fault again. Is there any fault message in the message display - usually not but check.

As said you need the codes to be read.