P0E45Hybrid/EV Battery Pack Voltage Sense E Circuit Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0E45 says pack voltage measurement E delivers a value that is electrically valid but does not fit the rest of the battery data. Such a rationality test usually compares the channel with the summed block or cell voltages, or with a second pack measurement. No manufacturer documents P0E45 publicly. GM's 2013 two-mode hybrid trucks (Tahoe, Yukon, Escalade, Silverado, Sierra) show the method on channel A: their battery pack control module fails P0ABB once the gap between pack voltage and the added-up block voltages exceeds 50 V in 70 of 80 checks taken every 100 ms, Type A, one trip. CARB requires plausibility monitoring for battery voltage sensors. Circuit, low, high and erratic faults of channel E are P0E44, P0E46, P0E47 and P0E48. Battery power is usually limited.
- What you may notice
- Warning light with reduced hybrid or electric power
- Displayed state of charge or range jumps unexpectedly
- Likely causes
- LikelyCorroded or loose sense connection adding resistance and skewing the reading
- PossibleDrifting measuring stage or outdated software in the battery controller
- RareFault in the reference value, e.g. a block or cell voltage channel
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €100 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.