Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

P0448

P0448

Diagnosis information - DME (DFI)

DMTL - Tank leakage diagnosis module, valve driver

Diagnostic conditions
- Supply voltage 10 V ... 16 V
- Engine running

Possible fault causes
- Open circuit, short circuit to B+ or short circuit to ground in control line to change-over valve of DMTL module
- Open circuit in the power supply to the DMTL module
- DMTL - tank leakage diagnosis module faulty