- Connect to vehicle's computer system and record all codes present. Test drive and monitor sensor values related to diagnostic codes. Perform a diagnostic check on area of emission system codes are referencing. If source of fault code is not found, next step is to check powers and grounds of related sensors. Re-set computer system if appropriate. Run engine from cold and monitor engine temperature vs. coolant temperature sensor computer is seeing. Thermostat is determined to be stuck open. Replace and recheck.
- Customer States Oil Drops Seen On Garage Floor. Diagnose Please.
Grant M. gave our service a 5 star review on 12/11/2019