Vehicle Will Not Charge And Hybrid Loss Of Isolation With DTC P0AA6 And/Or P1FFF P1F0E P0DAA – 2011-2016 Chevrolet Cadillac Opel & Holden

SEOCONTENT-START

Bulletin No.: PIC5920J
Published date: 07/19/2019
Preliminary Information
PIC5920J Vehicle Will Not Charge And Hybrid Loss Of Isolation With DTC P0AA6 And/Or P1FFF P1F0E
P0DAA
Models

Brand: Model: Model Years:

VIN:
from to

Engine: Transmissions:

Chevrolet Volt 2011 – 2014 All All
LUU MKA Cadillac ELR 2014 – 2016 All
All LUU MKA Opel Ampera 2011 – 2014
All All LUU MKA Holden Volt
2013 – 2014 All All LUU MKA
Supersession Statement
This PI was superseded to update Warranty Information. Please discard PIC5920H.

Condition / Concern
Some customers may comment that their vehicle will not charge. Customers may also comment that a
Check Engine Lamp is illuminated. Technicians may find a current code P0AA6 and / or a P1F0E set on
2011-2013 Volt or a P0DAA on 2014 Chevy Volt, Opel Ampera or Cadillac ELR in the HPCM2. When
diagnosing these DTC’S, potential causes to consider when evaluating the vehicle are:
1. A loss of Hybrid/EV Battery Pack coolant (external or internal to the Hybrid/EV Battery Pack)
2. A loss of high voltage isolation within the battery cells or battery sections themselves
Recommendations / Instructions
Locate the Isolation Test Resistance that is located in the HPCM 2 data list under HPCM 2 / Data
Display / Data Display / Hybrid/EV Powertrain Control Module 2 Data and note the current value on
the repair order.
Also note the Isolation Resistance from the freeze frame records in the HPCM2 for the P0AA6, P1F0E,
and/or P0DAA DTC.
Inspect Hybrid/EV Battery Pack coolant level by doing both of the following:
Note if the coolant level is low in the under hood reservoir.
Remove the drain plug for the battery to see if any water/coolant drains out, indicating a coolant
leak in the battery pack.
If necessary, refer to the Hybrid/EV Battery Cooling System Diagnostic in Service Information.
Important: All P0AA6 failures must include an inspection of 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 GM Technical
Assistance Center (TAC).
If the coolant level in the reservoir is at the proper level and there is no coolant or water
drained from the battery from the drain plug inspection.
2011 – 2014
Program the HPCM2 (K114B) and the BECM K16 with the latest calibration. If DTC sets again, review
freeze frame information again and follow SI diagnostics
2015 – 2016
Please follow SI for the DTC that set after performing the coolant plug inspection

Important: If you have any moisture that is found in the battery during the drain plug inspection
or the Isolation test resistance will not go above 275 kOhms after the HPCM2 and the BECM have been
updated, please contact the Technical Assistance Center (TAC) for further direction.
Warranty Information
For vehicles repaired under the EV coverage, use the following labor operation. Reference the
Applicable Warranties section of Investigate Vehicle History (IVH) for coverage information.
For 2011- 2014 Volt/Ampera And 2014 Cadillac ELR

Labor Operation Description
Labor Time 2880268* Reprogram the
HPCM2 and the BECM. 0.6 hr
* This is a unique labor operation for bulletin use only. This will not be published in the Labor
Time Guide.
The labor code above is covered under the Voltec or Emission warranty , coverage code: V or
E

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition
exhibited is resolved without completing every step, the remaining steps do not need to be
performed.

SEOCONTENT-END