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

H50 - Check Cylinder Compression

- Check cylinder compression.

- Are cylinder compression readings within specification?

YES -- For DTCs 1131, 1151, 1130 and 1150: Go to H51. H51 - Check HO2S Integrity

For DTCs 1132, 1152, 1130 AND 1150: Go to H56. H56 - Check For DTCs 1132 and 1152 With 1130 and 1150

NO -- REPAIR as necessary. COMPLETE PCM reset to clear DTCs. Clearing Diagnostic Trouble Codes

Rerun quick test. Diagnostic Subroutines (DSR) - Extracting Codes