PowertrainP0E74

Caution

Severity: Caution - get it checked when you can

Hybrid/EV Battery Voltage Internal Isolation Fault

9 brands affected · Generic SAE J2012 description.

Key terms: Control module: a small computer that runs one part of the car · SAE J2012: the standard generic code list · Powertrain: engine, transmission and emissions

Safety: This code relates to the charging system. The battery may go flat and the car may stall.

1What it means in plain English

The engine or powertrain control system has stored a fault that does not have specific guidance in this database yet.

2Common causes

Sensor or actuator fault
Wiring or connector fault
Vacuum or intake leak
Fuel or ignition problem
Control module fault

3Can I drive?

Caution · drive with care

The electrical system may fail and the battery may go flat, risking a stall. If the battery or charging warning light is on, drive straight to a workshop.

This page gives general information. It is not professional advice. For a definite diagnosis and a repair quote, ask a qualified mechanic to inspect the car.

4Brand data 9

Brand	Code	Description	System
Ashok Leyland CV	P0E74	Safety Belt Fasteners Control Unit'A'. - Loss Or Error In Messages Brand	Powertrain
Mercedes-Benz	P0E74	Hybrid/EV Battery Voltage Internal Isolation Fault SAE	Powertrain
EOBD	P0E74	Hybrid/EV-batterispenning intern isolasjonsfeil Brand	Powertrain
Honda	P0E74	HV Battery Voltage Internal Isolation Fault Brand	Powertrain
Isuzu	P0E74	Hybrid/EV Battery Voltage Internal Isolation Fault SAE	Powertrain
Land Rover	P0E74	Hybrid/EV Battery Voltage Internal Isolation Fault SAE	Powertrain
Peugeot	P0E74	Hybrid/EV Battery Voltage Internal Isolation Fault SAE	Powertrain
Subaru	P0E74	Hybrid/EV Battery Voltage Internal Isolation Fault SAE	Powertrain
Toyota	P0E74	Hybrid/EV battery voltage internal isolation fault Brand	Powertrain

Legend: SAE is the generic J2012 description; Brand is text taken from that manufacturer’s data. Manufacturer rows keep the wording and language of the source data, and non-English text is tagged so screen readers pronounce it correctly.

5Extended variant codes 6

These 7-character codes are manufacturer-specific variants of P0E74 and may be reported by some scan tools.

Brand	Code	Description	System
Mercedes-Benz	P0E7400	Hybrid/EV Battery Voltage Internal Isolation Fault Brand	Powertrain
Volkswagen	P0E7400	Hybrid/high-voltage battery, internal insulation fault Brand	Powertrain
Mercedes-Benz	P0E7466	Hybrid/EV Battery Voltage Internal Isolation Fault Brand	Powertrain
Mercedes-Benz	P0E74F1	No description available	Powertrain
Mercedes-Benz	P0E74FA	Hybrid/EV Battery Voltage Internal Isolation Fault. FA Brand	Powertrain
Mercedes-Benz	P0E74FB	Hybrid/EV Battery Voltage Internal Isolation Fault. FB Brand	Powertrain

6Related codes

Browse Pxxx codes or P0E7xx codes.