Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
HYUNDAI
Reported code forms P012800
Certain Santa Fe Hybrid (TM HEV), Santa Fe Plug-in Hybrid (TM PHEV), Tucson Hybrid (NX4 HEV), andTucson Plug-in Hybrid (NX4 PHEV) vehicles may experience intake air line freezing and Exhaust GasRecirculation (EGR) valve…
HYUNDAI
Reported code forms P012800
Certain Santa Fe Hybrid (TM HEV), Santa Fe Plug-in Hybrid (TM PHEV), Tucson Hybrid (NX4 HEV), and Tucson Plug-in Hybrid (NX4 PHEV) vehicles may experience intake air line freezing and Exhaust Gas Recirculation (EGR)…
HYUNDAI
Reported code forms P012800
Certain Santa Fe Hybrid (TM HEV), Santa Fe Plug-in Hybrid (TM PHEV), Tucson Hybrid (NX4 HEV), and Tucson Plug-in Hybrid (NX4 PHEV) vehicles may experience intake air line freezing and Exhaust Gas Recirculation (EGR)…
SUBARU
Reported code forms P0128
This bulletin announces the availability of new reprograming files for the Engine Control Module (ECM) developed to remedy the following DTCs: P0016, P0017, P0018, P0019, P0014, P0024, P0128, P2109. If any of the DTCs…
MITSUBISHI
Reported code forms P0128-00
This Service Campaign Bulletin sent to dealers provides instructions to reflash the ECU to address fault codes P0128-00, P2096-00 and P050A.
MITSUBISHI
Reported code forms P0128-00
This Service Campaign Bulletin sent to dealers provides instructions to reflash the ECU to address fault codes P0128-00, P2096-00 and P050A.
MERCEDES-BENZ, MERCEDES-MAYBACH
Reported code forms P012800
Complaint Check Engine Light ON with DTC P012800 "The Coolant Temperature is Below the Specified Temperature" active and/or stored in the ME (N3/10). There are no drivability concerns related to this complaint. Cause…
MITSUBISHI
Reported code forms P0128-00
This Service Campaign Bulletin sent to dealers provides instructions to reflash the ECU to address fault code P0128-00, and effective 6/26/2026, fault codes P2096-00 and P050A as well.
MITSUBISHI
Reported code forms P0128-00
This revised Technical Service Bulletin sent to dealers provides instructions to reflash the Engine Control Unit with updated software when a diagnostic code of P0128-00 is found.
MITSUBISHI
Reported code forms P0128-00
This revised Technical Service Bulletin sent to dealers provides instructions to reflash the Engine Control Unit with updated software when a diagnostic code of P0128-00 is found.
MERCEDES-BENZ, MERCEDES-MAYBACH
Reported code forms P012800
Complaint CEL ON with DTC P012800 "The Coolant Temperature is Below the Specified Temperature" active and stored in the ME (N3/10). There are no drivability concerns related to the complaint. Cause Root cause varies…
MITSUBISHI
Reported code forms P0128-00
This revised Technical Service Bulletin provides guidance when the check engine light is on with P0128-00 stored in the Engine ECU.
MITSUBISHI
Reported code forms P0128-00
This Warranty Bulletin provides instructions on submiting a warranty claim when the check engine light is on with either P2096-00 or P0128-00 stored in the Engine ECU.
MITSUBISHI
Reported code forms P0128-00
This Technical Service Bulletin provides guidance when the check engine light is on with P0128-00 stored in the Engine ECU.
RAM
Reported code forms P0128-00
Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes…
RAM
Reported code forms P0128-00
Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes…
VOLVO
Reported code forms P012807 P01287A
This is a Technical Journal: MIL and DTCs ECM P012807/P01287A. In case of MIL and DTCs P012807 and P01287A set together, follow advice under "Service". A software solution was released in version 3.4.4
RAM
Reported code forms P0128-00
Flash: Powertrain Control Module (PCM) Updates **Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes…
RAM
Reported code forms P0128-00
Flash: Powertrain Control Module (PCM) Updates **Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes…
MERCEDES-BENZ, MERCEDES-MAYBACH
Reported code forms P012800
Complaint CEL on with Code P012800 "The Coolant Temperature is Below the Specified Temperature" Cause Under investigation. This is not an issue that affects drivability or performance and is not a safety concern. The…
VOLVO
Reported code forms P012807 P01287A
This is a Technical Journal: MIL and DTCs ECM P012807/P01287A. In case of MIL and DTCs P012807 and P01287A set together, follow advice under "Service". A software solution was released in version 3.4.4
MERCEDES-BENZ, MERCEDES-MAYBACH
Reported code forms P012800
Complaint CEL on with Code P012800 "The Coolant Temperature is Below the Specified Temperature" Cause Under investigation. This is not an issue that affects drivability or performance and is not a safety concern. The…
MERCEDES-BENZ
Reported code forms P012800
Complaint Check engine lamp illuminated. Fault code stored P012800-The coolant temperature is below the coolant thermostat specified temperature. Cause Various possible causes Remedy 1- Update HVAC with latest software…
FORD
Reported code forms P0128
Some of the vehicles listed in the Model statement above may exhibit an incorrectly illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P0128 stored in the powertrain control module (PCM).…
MERCEDES-BENZ
Reported code forms P012800
Complaint Customer states that the CEL is lit in the instrument cluster. Various codes may be active/stored: Stored in N3/10 in model series 206, 254 or 232: P012800 - The coolant temperature is below the coolant…
RAM
Reported code forms P0128-00
Flash: Powertrain Control Module (PCM) Updates **Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ●…
RAM
Reported code forms P0128-00
Flash: Powertrain Control Module (PCM) Updates **Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ●…
RAM
Reported code forms P0128-00
Flash: Powertrain Control Module (PCM) Updates **Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ●…
FORD
Reported code forms P0128
Some of the vehicles listed in the Model statement above may exhibit an incorrectly illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTC) P0128, P0420, and/or P0430 stored in the powertrain…
RAM
Reported code forms P0128
Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ●…