Diagnostic article Generic OBD-II
P0DAE: A commanded cell-balancing channel does not respond
The documented Mazda P0DAE procedure covers a commanded cell-balancing channel does not respond.
Read before applying this article
Documented application
Mazda3 workshop manual 01/2019 onward, d9n1-1a-22d_ver10; Mazda M Hybrid BATTERY. Verify exact vehicle specification; this is a Mazda application example.
The code alone does not identify a failed part or establish that a vehicle is safe to drive. Confirm the vehicle, reporting module and applicable service procedure.
P0DAE is the hybrid battery cell-balancing circuit stuck-off code. Mazda's M Hybrid battery adds F1–F9 suffixes to identify cell channels 1–9.
Requested balancing changes the interpretation
Unlike the paired unintended-balancing code, P0DAE applies to a cell that is targeted for balance control but does not show the expected monitored response. The same cell reading cannot be interpreted without knowing whether that channel was commanded to balance.
The source requires the battery READY state and absence of specified voltage-monitor faults. It describes approximately twenty-second assessments repeated five consecutive times. This persistence requirement makes an isolated scan value insufficient to diagnose a permanently failed balancing channel.
Preserve channel and status information
The factory explanation uses an internal 0.9 V balance-response comparison. It should not be treated as a normal battery-cell voltage specification or as an instruction to discharge cells manually. The code and its F suffix identify the control-response disagreement that the battery management system detected.
Mazda lists a battery malfunction as the possible cause and checks whether the fault is current or historical before its repeatability decision. No separate fail-safe is stated. A qualified technician should retain the full suffix, battery state and companion records, then use the exact pack service procedure. Do not open the pack or bypass balancing electronics to force the reported condition to disappear.
Documented application
Mazda3 workshop manual 01/2019 onward, d9n1-1a-22d_ver10; Mazda M Hybrid BATTERY. Verify exact vehicle specification; this is a Mazda application example. Mazda factory diagnostic page, mirrored by CHARM.
Article source documents
Source checks describe how the text was prepared; they do not certify a diagnosis or confirm compatibility with every vehicle using this code.
Original code reference
Dictionary definition
Hybrid/EV Battery Cell Balancing Circuit A Stuck Off
This definition retains its original catalog scope. The article above is limited to its explicitly documented application.
Reference scope
Generic OBD-II definition.
A manufacturer label does not establish the model, year, engine or module to which a diagnosis applies. Read the safety and diagnostic limits.
Definition source
- DTC Database: pinned community code definitions
Source checked · MIT