122
UnclassifiedEmissions
What This Code Means
DST displays ECT temperature of 235 degrees F. or greater with the engine running over 650 rpm; Temperature gauge indicates 230 degrees F. or greater
Possible Causes
- •Cooling system issue
- •Diagnostic Trouble Code current for a sensor
- •ECT circuit malfunction
- •ECT sensor signal voltage less than 0.05 volts while engine is running
- •Intermittent problem
- •Unresolved lower-numbered DTC (DTC 112 causing DTC 122)
Suggested Actions
- 1Clear DTCs by turning ignition key to OFF position and removing system main power fuse (F3) for 15 seconds
- 2Clear DTCs using a laptop computer
- 3Connect Diagnostic Scan Tool (DST) in System Data Mode, warm engine to normal operating temperature, then run the engine above 1000 rpm for 60 seconds
- 4Diagnose problems starting with the lowest number DTC first
- 5Perform the On-Board (OBD) System Check
- 6Refer to Intermittent section for troubleshooting
- 7Repair Cooling system
- 8Repair DTC 112 first to correct DTC 122
- 9Verify ECT circuit function and follow diagnostic test procedure for DTC-122 ECT Low Voltage
- 10Verify engine coolant temperature with a temperature gauge
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