Service bulletin 19NA079
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
| Type | Service bulletin |
|---|---|
| NHTSA id | 10163235 |
| Published by NHTSA | 2019-07-29 |
| Manufacturer's number | 19NA079 |
| Manufacturer's date | 2019-06-03 |
| NHTSA component | HYBRID PROPULSION SYSTEM |
NHTSA's summary
This technical bulletin provides repair information to correct a customer concern of a Propulsion Power is Reduced message displayed in the DIC and without DTCs set on higher mileage vehicles by reprogramming the HPCM 2.
The document
The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.
Components
Hybrid and electric drive
| CADILLAC ELR | 2014, 2015 |
|---|---|
| CHEVROLET VOLT | 2013, 2014, 2015 |
Listing a model year does not mean every vehicle of it is concerned: the document says which.
| 18V397000 | 2018-06-14. HYBRID PROPULSION SYSTEM |
|---|
A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.
| 14114 | 2023-12-18. Service bulletin. RESS Battery Coolant Level Low |
|---|---|
| PIC5523C | 2023-12-11. Service bulletin. Diagnostic Tip Vehicle Will Not Crank Waiting To Initialize Message. |
| 120845001A | 2023-12-04. Service bulletin. Diagnostic Information for Intermittent 110/220V AC Plug-In Charging |
| 120089008 | 2023-12-04. Service bulletin. High Voltage Battery Section Serviceability - Essential Tool EL-50332 |
| 19NA079 | 2019-10-28. Service bulletin. This technical bulletin provides repair information to correct a customer concern of a Propulsion Power is Reduced message displayed in the DIC and without DTCs set on higher mileage vehicles by reprogramming the HPCM 2. |
| N172130462 01 | 2019-06-24. Service bulletin. Customer Satisfaction. Certain 2013 model year Chevrolet Volt vehicles equipped with a high voltage battery, may have a condition where it could gradually lose the ability to maintain voltage. If battery concerns are not addressed, over time the vehicle could enter a reduced propulsion mode while driving, or lose propulsion, or it may not start. Dealers are to update the Hybrid Powertrain Control Module 2 (HPCM2). This software update is intended to increase the amount of warning time provided. |
| PIP4869D | 2018-06-04. Service bulletin. This Preliminary Information communication provides information to the technician about vehicles that display a ?Propulsion Power is Reduced? in the Driver Information Center when driving in the mountains. Dealer should advise the customer the vehicle should be placed in Mountain Mode on the vehicle when the vehicle has a full charge if their travel plans involve mountainous driving before the next charge event. |
| PIC5920C | 2017-12-22. Service bulletin. This Preliminary Information communication provides information to the technician about vehicles that will not charge and Service Engine Soon Malfunction Indicator Lamp on. Technician may find Diagnostic Trouble Codes P0AA6 and/ or a P1F0E set on 2011-2013 Volt or a P0DAA on 2014 Volt or Cadillac ELR in the Hybrid Powertrain Control Module 2. Technician will need to inspect the coolant level in the Hybrid/EV Battery Pack. If the coolant is found low follow published Service Information diagnostics. Technician will need to inspect the Hybrid/EV Battery Pack drain plug, located on the battery tray, regardless of fluid level at the Hybrid/EV Battery Pack coolant reservoir. If any moisture is found during the drain plug inspection, contact the General Motors Technical Assistance Center for further assistance. If the coolant level in cooling system is at the proper level and there is no moisture in the battery during the drain plug inspection, and the coolant freeze protection is between -10 and -40 degrees Fahrenheit, then update the Hybrid Powertrain Control Module2 and Battery Energy Control Module with the latest Calibrations in TIS-2-Web. Technician will need to gather all measurements recorded while evaluating Diagnostic Trouble Code P0AA6 and contact the GM Technical Assistance Center for further assistance. |
| PIC5920B | 2017-12-22. Service bulletin. This Preliminary Information communication provides information to the technician about vehicles that will not charge and Service Engine Soon Malfunction Indicator Lamp on. Technician may find Diagnostic Trouble Codes P0AA6 and/ or a P1F0E set on 2011-2013 Volt or a P0DAA on 2014 Volt or Cadillac ELR in the Hybrid Powertrain Control Module 2. Technician will need to inspect the coolant level in the Hybrid/EV Battery Pack. If the coolant is found low follow published Service Information diagnostics. Technician will need to inspect the Hybrid/EV Battery Pack drain plug, located on the battery tray, regardless of fluid level at the Hybrid/EV Battery Pack coolant reservoir. If any moisture is found during the drain plug inspection, contact the General Motors Technical Assistance Center for further assistance. If the coolant level in cooling system is at the proper level and there is no moisture in the battery during the drain plug inspection, and the coolant freeze protection is between -10 and -40 degrees Fahrenheit, then update the Hybrid Powertrain Control Module2 and Battery Energy Control Module with the latest Calibrations in TIS-2-Web. Technician will need to gather all measurements recorded while evaluating Diagnostic Trouble Code P0AA6 and contact the GM Technical Assistance Center for further assistance. |
| PIC6292 | 2017-08-15. Service bulletin. This Preliminary information communicates that aPropulsion Power is reduced message occurs during regular operation, and there are no DTCs present, then contact GM Technical Assistance for direction |