DTC Troubleshooting
DTC TROUBLESHOOTING PROCEDURES
| Step | Action | YES | NO |
|---|---|---|---|
| 1 | Was "Engine and Emission Control System Check"performed? | Go to Step 2. | Go to ENGINE AND EMISSION CONTROL SYSTEM DESCRIPTION . |
| 2 | DTC check Is there any DTC(s) other than P2227, P2228 and P2229? |
Go to applicable DTC diag. flow. | Substitute a known good ECM and recheck. |