CEL Blink Code 8 -7
05-22-2008, 07:19 AM
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CEL Blink Code 8 -7
My CEL just came on. I checked the codes using the blink code method and came up with code 8 - 7. I have searched and searched and cannot find this code.
Does anyone know what this code refers to?
Thank you!
Does anyone know what this code refers to?
Thank you!
05-22-2008, 11:08 AM
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that dosn't really mean anything on these cars. you can just take the car to a local autozone and have them pull the code for you. cod will be a letter followed by numbers. (ex. P0123)
05-22-2008, 02:32 PM
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I went to Advance Auto. The code is P0128. This code refers to "coolant temp below thermostat regulating temp."
Does this mean I have a bad thermostat or a bad coolant temp sensor?
Does this mean I have a bad thermostat or a bad coolant temp sensor?
05-22-2008, 02:58 PM
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HOPE THIS HELPS>>>>good luck
HDS-is the code scanner
P0128
DTC P0128: Cooling System Malfunction
NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.
1.Turn the ignition switch ON (II).
2.Clear the DTC with the HDS.
3.Turn the blower switch OFF.
4.Turn the A/C switch OFF.
5.Check the FAN CTRL in the DATA LIST with the HDS. Is it OFF? YES - Go to step NO - Wait until the FAN CTRL is off, then go to step 6.
6.Check the radiator fan operation. Does the radiator fan keep running? YES - Check the radiator fan circuit, the radiator fan switch circuit for open, the radiator fan switch circuit for short, and the radiator fan switch. If the circuits and the switch are OK, go to step 20. NO - Go to step 7.
7.Let the engine cool until the coolant temperature is 104 degree F (40 degree C) or less.
8.Note the value of ECT SENSOR 1 and ECT SENSOR 2 in the DATA LIST with the HDS.
9.Start the engine, and let it idle.
10.Let the engine idle until ECT SENSOR 1 goes up 49 degree F (27 degree C) or more from the recorded temperature.
11.Check ECT SENSOR 2 in the DATA LIST with the HDS.
12.Compare the value of recorded ECT SENSOR 2 and the value of present ECT SENSOR 2. Did temperature rise 17 degree F (9.5 degree C) or more? YES - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at ECT sensor 1, ECT sensor 2, and the ECM. NO - Test the thermostat, then go to step 13.
13.Turn the ignition switch ON (II).
14.Reset the ECM with the HDS.
15.Let the engine cool until the coolant temperature is between 21 degree F (-6 degree C) and 104 degree F (40 degree C) .
16.Do the ECM idle learn procedure.
17.Test-drive at a steady speed between 15 - 75 mph (24 - 120 km/h) for 10 minutes .
18.Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0128 is indicated, check the cooling system, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting. NO - Go to step 19.
19.Monitor the OBD STATUS for DTC P0128 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES - Troubleshooting is complete. NO - If the screen indicates FAILED, check the cooling system, then go to step 1. If the screen indicates NOT COMPLETED, go to step 15 and recheck.
20.Update the ECM if it does not have the latest software, or substitute a known-good ECM.
21.Let the engine cool until the coolant temperature is between 21 degree F (-6 degree C) and 104 degree F (40 degree C) .
22.Start the engine. Hold the engine speed at 3,000 rpm without load (in neutral) until the radiator fan comes on, then let it idle.
23.Test-drive at a steady speed between 15 - 75 mph (24 - 120 km/h) for 10 minutes .
24.Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0128 is indicated, check for poor connections or loose terminals at ECT sensor 1, ECT sensor 2, and the ECM, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting. NO - If the ECM was updated, troubleshooting is complete. If the ECM was substituted, replace the original ECM.
HDS-is the code scanner
P0128
DTC P0128: Cooling System Malfunction
NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.
1.Turn the ignition switch ON (II).
2.Clear the DTC with the HDS.
3.Turn the blower switch OFF.
4.Turn the A/C switch OFF.
5.Check the FAN CTRL in the DATA LIST with the HDS. Is it OFF? YES - Go to step NO - Wait until the FAN CTRL is off, then go to step 6.
6.Check the radiator fan operation. Does the radiator fan keep running? YES - Check the radiator fan circuit, the radiator fan switch circuit for open, the radiator fan switch circuit for short, and the radiator fan switch. If the circuits and the switch are OK, go to step 20. NO - Go to step 7.
7.Let the engine cool until the coolant temperature is 104 degree F (40 degree C) or less.
8.Note the value of ECT SENSOR 1 and ECT SENSOR 2 in the DATA LIST with the HDS.
9.Start the engine, and let it idle.
10.Let the engine idle until ECT SENSOR 1 goes up 49 degree F (27 degree C) or more from the recorded temperature.
11.Check ECT SENSOR 2 in the DATA LIST with the HDS.
12.Compare the value of recorded ECT SENSOR 2 and the value of present ECT SENSOR 2. Did temperature rise 17 degree F (9.5 degree C) or more? YES - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at ECT sensor 1, ECT sensor 2, and the ECM. NO - Test the thermostat, then go to step 13.
13.Turn the ignition switch ON (II).
14.Reset the ECM with the HDS.
15.Let the engine cool until the coolant temperature is between 21 degree F (-6 degree C) and 104 degree F (40 degree C) .
16.Do the ECM idle learn procedure.
17.Test-drive at a steady speed between 15 - 75 mph (24 - 120 km/h) for 10 minutes .
18.Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0128 is indicated, check the cooling system, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting. NO - Go to step 19.
19.Monitor the OBD STATUS for DTC P0128 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES - Troubleshooting is complete. NO - If the screen indicates FAILED, check the cooling system, then go to step 1. If the screen indicates NOT COMPLETED, go to step 15 and recheck.
20.Update the ECM if it does not have the latest software, or substitute a known-good ECM.
21.Let the engine cool until the coolant temperature is between 21 degree F (-6 degree C) and 104 degree F (40 degree C) .
22.Start the engine. Hold the engine speed at 3,000 rpm without load (in neutral) until the radiator fan comes on, then let it idle.
23.Test-drive at a steady speed between 15 - 75 mph (24 - 120 km/h) for 10 minutes .
24.Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0128 is indicated, check for poor connections or loose terminals at ECT sensor 1, ECT sensor 2, and the ECM, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting. NO - If the ECM was updated, troubleshooting is complete. If the ECM was substituted, replace the original ECM.
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