Fault Family System: Powertrain (P-Codes) 131 SAE Codes

HV Battery Voltage Sense

Diagnostic & Technical Explanation

Code P0B3B sets when the battery management system detects an implausible reading from one cell-group's voltage-sense tap on the pack's cell-monitoring board — the value disagrees with its neighboring cell groups or fails a hard-limit check. Because each tap is a dedicated sense wire soldered or crimped to a module busbar rather than a standalone sensor, the most common causes are a sense-wire connector that backed out at the cell-monitoring board, a crimp that corroded at the busbar tap, and a monitoring-IC input channel that failed on the board itself. This circuit differs from the pack-level voltage-sense family in that it reports one cell group's voltage rather than the summed pack voltage.

These 131 diagnostic trouble codes share one detection mechanism and one repair path, which is why MechanicDB groups them into a single authored fault family rather than repeating the same explanation 131 times.

Codes in this family (131)

Code	Definition	Repair coverage
P0B3B	Hybrid/EV Battery Voltage Sense A Circuit	4 ranked fixes
P0B3C	Hybrid/EV Battery Voltage Sense A Circuit Range/Performance	4 ranked fixes
P0B3D	Hybrid/EV Battery Voltage Sense A Circuit Low	4 ranked fixes
P0B3E	Hybrid/EV Battery Voltage Sense A Circuit High	4 ranked fixes
P0B3F	Hybrid/EV Battery Voltage Sense A Circuit Intermittent/Erratic	4 ranked fixes
P0B40	Hybrid/EV Battery Voltage Sense B Circuit	4 ranked fixes
P0B41	Hybrid/EV Battery Voltage Sense B Circuit Range/Performance	4 ranked fixes
P0B42	Hybrid/EV Battery Voltage Sense B Circuit Low	4 ranked fixes
P0B43	Hybrid/EV Battery Voltage Sense B Circuit High	4 ranked fixes
P0B44	Hybrid/EV Battery Voltage Sense B Circuit Intermittent/Erratic	4 ranked fixes
P0B45	Hybrid/EV Battery Voltage Sense C Circuit	4 ranked fixes
P0B46	Hybrid/EV Battery Voltage Sense C Circuit Range/Performance	4 ranked fixes
P0B47	Hybrid/EV Battery Voltage Sense C Circuit Low	4 ranked fixes
P0B48	Hybrid/EV Battery Voltage Sense C Circuit High	4 ranked fixes
P0B49	Hybrid/EV Battery Voltage Sense C Circuit Intermittent/Erratic	4 ranked fixes
P0B4A	Hybrid/EV Battery Voltage Sense D Circuit	4 ranked fixes
P0B4B	Hybrid/EV Battery Voltage Sense D Circuit Range/Performance	4 ranked fixes
P0B4C	Hybrid/EV Battery Voltage Sense D Circuit Low	4 ranked fixes
P0B4D	Hybrid/EV Battery Voltage Sense D Circuit High	4 ranked fixes
P0B4E	Hybrid/EV Battery Voltage Sense D Circuit Intermittent/Erratic	4 ranked fixes
P0B4F	Hybrid/EV Battery Voltage Sense E Circuit	4 ranked fixes
P0B50	Hybrid/EV Battery Voltage Sense E Circuit Range/Performance	4 ranked fixes
P0B51	Hybrid/EV Battery Voltage Sense E Circuit Low	4 ranked fixes
P0B52	Hybrid/EV Battery Voltage Sense E Circuit High	4 ranked fixes
P0B53	Hybrid/EV Battery Voltage Sense E Circuit Intermittent/Erratic	4 ranked fixes
P0B54	Hybrid/EV Battery Voltage Sense F Circuit	4 ranked fixes
P0B55	Hybrid/EV Battery Voltage Sense F Circuit Range/Performance	4 ranked fixes
P0B56	Hybrid/EV Battery Voltage Sense F Circuit Low	4 ranked fixes
P0B57	Hybrid/EV Battery Voltage Sense F Circuit High	4 ranked fixes
P0B58	Hybrid/EV Battery Voltage Sense F Circuit Intermittent/Erratic	4 ranked fixes
P0B59	Hybrid/EV Battery Voltage Sense G Circuit	4 ranked fixes
P0B5A	Hybrid/EV Battery Voltage Sense G Circuit Range/Performance	4 ranked fixes
P0B5B	Hybrid/EV Battery Voltage Sense G Circuit Low	4 ranked fixes
P0B5C	Hybrid/EV Battery Voltage Sense G Circuit High	4 ranked fixes
P0B5D	Hybrid/EV Battery Voltage Sense G Circuit Intermittent/Erratic	4 ranked fixes
P0B5E	Hybrid/EV Battery Voltage Sense H Circuit	4 ranked fixes
P0B5F	Hybrid/EV Battery Voltage Sense H Circuit Range/Performance	4 ranked fixes
P0B60	Hybrid/EV Battery Voltage Sense H Circuit Low	4 ranked fixes
P0B61	Hybrid/EV Battery Voltage Sense H Circuit High	4 ranked fixes
P0B62	Hybrid/EV Battery Voltage Sense H Circuit Intermittent/Erratic	4 ranked fixes
P0B63	Hybrid/EV Battery Voltage Sense I Circuit	4 ranked fixes
P0B64	Hybrid/EV Battery Voltage Sense I Circuit Range/Performance	4 ranked fixes
P0B65	Hybrid/EV Battery Voltage Sense I Circuit Low	4 ranked fixes
P0B66	Hybrid/EV Battery Voltage Sense I Circuit High	4 ranked fixes
P0B67	Hybrid/EV Battery Voltage Sense I Circuit Intermittent/Erratic	4 ranked fixes
P0B68	Hybrid/EV Battery Voltage Sense J Circuit	4 ranked fixes
P0B69	Hybrid/EV Battery Voltage Sense J Circuit Range/Performance	4 ranked fixes
P0B6A	Hybrid/EV Battery Voltage Sense J Circuit Low	4 ranked fixes
P0B6B	Hybrid/EV Battery Voltage Sense J Circuit High	4 ranked fixes
P0B6C	Hybrid/EV Battery Voltage Sense J Circuit Intermittent/Erratic	4 ranked fixes
P0B6D	Hybrid/EV Battery Voltage Sense K Circuit	4 ranked fixes
P0B6E	Hybrid/EV Battery Voltage Sense K Circuit Range/Performance	4 ranked fixes
P0B6F	Hybrid/EV Battery Voltage Sense K Circuit Low	4 ranked fixes
P0B70	Hybrid/EV Battery Voltage Sense K Circuit High	4 ranked fixes
P0B71	Hybrid/EV Battery Voltage Sense K Circuit Intermittent/Erratic	4 ranked fixes
P0B72	Hybrid/EV Battery Voltage Sense L Circuit	4 ranked fixes
P0B73	Hybrid/EV Battery Voltage Sense L Circuit Range/Performance	4 ranked fixes
P0B74	Hybrid/EV Battery Voltage Sense L Circuit Low	4 ranked fixes
P0B75	Hybrid/EV Battery Voltage Sense L Circuit High	4 ranked fixes
P0B76	Hybrid/EV Battery Voltage Sense L Circuit Intermittent/Erratic	4 ranked fixes
P0B77	Hybrid/EV Battery Voltage Sense M Circuit	4 ranked fixes
P0B78	Hybrid/EV Battery Voltage Sense M Circuit Range/Performance	4 ranked fixes
P0B79	Hybrid/EV Battery Voltage Sense M Circuit Low	4 ranked fixes
P0B7A	Hybrid/EV Battery Voltage Sense M Circuit High	4 ranked fixes
P0B7B	Hybrid/EV Battery Voltage Sense M Circuit Intermittent/Erratic	4 ranked fixes
P0B7C	Hybrid/EV Battery Voltage Sense N Circuit	4 ranked fixes
P0B7D	Hybrid/EV Battery Voltage Sense N Circuit Range/Performance	4 ranked fixes
P0B7E	Hybrid/EV Battery Voltage Sense N Circuit Low	4 ranked fixes
P0B7F	Hybrid/EV Battery Voltage Sense N Circuit High	4 ranked fixes
P0B80	Hybrid/EV Battery Voltage Sense N Circuit Intermittent/Erratic	4 ranked fixes
P0B81	Hybrid/EV Battery Voltage Sense O Circuit	4 ranked fixes
P0B82	Hybrid/EV Battery Voltage Sense O Circuit Range/Performance	4 ranked fixes
P0B83	Hybrid/EV Battery Voltage Sense O Circuit Low	4 ranked fixes
P0B84	Hybrid/EV Battery Voltage Sense O Circuit High	4 ranked fixes
P0B85	Hybrid/EV Battery Voltage Sense O Circuit Intermittent/Erratic	4 ranked fixes
P0B86	Hybrid/EV Battery Voltage Sense P Circuit	4 ranked fixes
P0B87	Hybrid/EV Battery Voltage Sense P Circuit Range/Performance	4 ranked fixes
P0B88	Hybrid/EV Battery Voltage Sense P Circuit Low	4 ranked fixes
P0B89	Hybrid/EV Battery Voltage Sense P Circuit High	4 ranked fixes
P0B8A	Hybrid/EV Battery Voltage Sense P Circuit Intermittent/Erratic	4 ranked fixes
P0B8B	Hybrid/EV Battery Voltage Sense Q Circuit	4 ranked fixes
P0B8C	Hybrid/EV Battery Voltage Sense Q Circuit Range/Performance	4 ranked fixes
P0B8D	Hybrid/EV Battery Voltage Sense Q Circuit Low	4 ranked fixes
P0B8E	Hybrid/EV Battery Voltage Sense Q Circuit High	4 ranked fixes
P0B8F	Hybrid/EV Battery Voltage Sense Q Circuit Intermittent/Erratic	4 ranked fixes
P0B90	Hybrid/EV Battery Voltage Sense R Circuit	4 ranked fixes
P0B91	Hybrid/EV Battery Voltage Sense R Circuit Range/Performance	4 ranked fixes
P0B92	Hybrid/EV Battery Voltage Sense R Circuit Low	4 ranked fixes
P0B93	Hybrid/EV Battery Voltage Sense R Circuit High	4 ranked fixes
P0B94	Hybrid/EV Battery Voltage Sense R Circuit Intermittent/Erratic	4 ranked fixes
P0B95	Hybrid/EV Battery Voltage Sense S Circuit	4 ranked fixes
P0B96	Hybrid/EV Battery Voltage Sense S Circuit Range/Performance	4 ranked fixes
P0B97	Hybrid/EV Battery Voltage Sense S Circuit Low	4 ranked fixes
P0B98	Hybrid/EV Battery Voltage Sense S Circuit High	4 ranked fixes
P0B99	Hybrid/EV Battery Voltage Sense S Circuit Intermittent/Erratic	4 ranked fixes
P0B9A	Hybrid/EV Battery Voltage Sense T Circuit	4 ranked fixes
P0B9B	Hybrid/EV Battery Voltage Sense T Circuit Range/Performance	4 ranked fixes
P0B9C	Hybrid/EV Battery Voltage Sense T Circuit Low	4 ranked fixes
P0B9D	Hybrid/EV Battery Voltage Sense T Circuit High	4 ranked fixes
P0B9E	Hybrid/EV Battery Voltage Sense T Circuit Intermittent/Erratic	4 ranked fixes
P0B9F	Hybrid/EV Battery Voltage Sense U Circuit	4 ranked fixes
P0BA0	Hybrid/EV Battery Voltage Sense U Circuit Range/Performance	4 ranked fixes
P0BA1	Hybrid/EV Battery Voltage Sense U Circuit Low	4 ranked fixes
P0BA2	Hybrid/EV Battery Voltage Sense U Circuit High	4 ranked fixes
P0BA3	Hybrid/EV Battery Voltage Sense U Circuit Intermittent/Erratic	4 ranked fixes
P0BA4	Hybrid/EV Battery Voltage Sense V Circuit	4 ranked fixes
P0BA5	Hybrid/EV Battery Voltage Sense V Circuit Range/Performance	4 ranked fixes
P0BA6	Hybrid/EV Battery Voltage Sense V Circuit Low	4 ranked fixes
P0BA7	Hybrid/EV Battery Voltage Sense V Circuit High	4 ranked fixes
P0BA8	Hybrid/EV Battery Voltage Sense V Circuit Intermittent/Erratic	4 ranked fixes
P0BA9	Hybrid/EV Battery Voltage Sense W Circuit	4 ranked fixes
P0BAA	Hybrid/EV Battery Voltage Sense W Circuit Range/Performance	4 ranked fixes
P0BAB	Hybrid/EV Battery Voltage Sense W Circuit Low	4 ranked fixes
P0BAC	Hybrid/EV Battery Voltage Sense W Circuit High	4 ranked fixes
P0BAD	Hybrid/EV Battery Voltage Sense W Circuit Intermittent/Erratic	4 ranked fixes
P0BAE	Hybrid/EV Battery Voltage Sense X Circuit	4 ranked fixes
P0BAF	Hybrid/EV Battery Voltage Sense X Circuit Range/Performance	4 ranked fixes
P0BB0	Hybrid/EV Battery Voltage Sense X Circuit Low	4 ranked fixes
P0BB1	Hybrid/EV Battery Voltage Sense X Circuit High	4 ranked fixes
P0BB2	Hybrid/EV Battery Voltage Sense X Circuit Intermittent/Erratic	4 ranked fixes
P0BB3	Hybrid/EV Battery Voltage Sense Y Circuit	4 ranked fixes
P0BB4	Hybrid/EV Battery Voltage Sense Y Circuit Range/Performance	4 ranked fixes
P0BB5	Hybrid/EV Battery Voltage Sense Y Circuit Low	4 ranked fixes
P0BB6	Hybrid/EV Battery Voltage Sense Y Circuit High	4 ranked fixes
P0BB7	Hybrid/EV Battery Voltage Sense Y Circuit Intermittent/Erratic	4 ranked fixes
P0BB8	Hybrid/EV Battery Voltage Sense Z Circuit	4 ranked fixes
P0BB9	Hybrid/EV Battery Voltage Sense Z Circuit Range/Performance	4 ranked fixes
P0BBA	Hybrid/EV Battery Voltage Sense Z Circuit Low	4 ranked fixes
P0BBB	Hybrid/EV Battery Voltage Sense Z Circuit High	4 ranked fixes
P0BBC	Hybrid/EV Battery Voltage Sense Z Circuit Intermittent/Erratic	4 ranked fixes
P0ECB	Hybrid/EV Battery Voltage Sensor System - Multiple Sensor Correlation	4 ranked fixes

What this page does not show

This page publishes the fault mechanism and the code index. The licensed dataset adds, for every one of the 15,886 codes, the full authored repair set (56,729 procedures in total) with the fields deliberately withheld here:

Procedures 2..n after the first-listed procedure
Aftermarket parts cost ranges in USD (est_parts_cost_min/max_usd)
Professional labor-hour estimates (est_labor_hours)
Step-by-step diagnostic and repair instructions
Replacement-part mappings and catalog lookups
6,637 manufacturer-specific OEM codes across 32 makes ($149 tier)

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