Fault Family System: Powertrain (P-Codes) 4 SAE Codes

HV Battery Coolant Level Sensor

Diagnostic & Technical Explanation

Code P2BE0 (Hybrid/EV Battery Coolant Level Sensor Circuit/Open) sets when the sensor monitoring coolant level in the HV battery pack's expansion reservoir reads open, shorted, out-of-range, or implausible, which the battery management system relies on to catch a slow coolant leak before it becomes a cooling-capacity problem. Causes are a float-type sensor stuck by mineral deposits, a corroded connector at the reservoir, or a genuinely low coolant level from a slow leak elsewhere in the pack's loop.

These 4 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 4 times.

Codes in this family (4)

Code	Definition	Repair coverage
P2BE0	Hybrid/EV Battery Coolant Level Sensor Circuit/Open	3 ranked fixes
P2BE1	Hybrid/EV Battery Coolant Level Sensor Range/Performance	3 ranked fixes
P2BE2	Hybrid/EV Battery Coolant Level Sensor Circuit Low	3 ranked fixes
P2BE3	Hybrid/EV Battery Coolant Level Sensor Circuit High	3 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)

Need All 15,886 Codes as Data?

Pipe-delimited CSV, Apache Parquet and a relational SQLite database, with commercial application rights and instant download. Built for scan tools, shop software and research - not assembled one web page at a time.

License OEM Complete · $149 Standard (SAE only) · $49

$49 Standard: 9,249 SAE codes · $149 OEM Complete: all 15,886 codes, including 6,637 OEM codes across 32 makes · $149 Heavy Duty: 4,212 fault pairs (J1939) · one-time · compare tiers