PowertrainP1E21

Caution

Severity: Caution - get it checked when you can

Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage Sense Circuit High Voltage

12 brands affected · Description from GM data.

Key terms: Control module: a small computer that runs one part of the car · 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 12

Brand	Code	Description	System
Daewoo	P1E21	Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage Sense Circuit High Voltage Brand	Powertrain
EOBD	P1E21	Litar sensor suhu bateri (1) Brand	Powertrain
GM	P1E21	Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage Sense Circuit High Voltage Brand	Powertrain
Holden	P1E21	Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage Sense Circuit High Voltage Brand	Powertrain
Honda	P1E21	No description available	Powertrain
Hyundai	P1E21	No description available	Powertrain
Maserati	P1E21	Electronic Throttle Control (ETC) Motor Self-Learning (Limp Home Position) Bank 2 Brand	Powertrain
Mitsubishi	P1E21	BATT.TEMP sensor circuit(1) Brand	Powertrain
Opel	P1E21	Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage Sense Circuit High Voltage Brand	Powertrain
Peugeot	P1E21	Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage Sense Circuit High Voltage Brand	Powertrain
Proton	P1E21	BATT.TEMP sensor circuit(1) Brand	Powertrain
Saab	P1E21	No description available	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 5

These 7-character codes are manufacturer-specific variants of P1E21 and may be reported by some scan tools.

Brand	Code	Description	System
Mercedes-Benz	P1E2111	Sensor B 'Output voltage of on-board charger' has a malfunction. There is a short circuit to ground Brand	Powertrain
Mercedes-Benz	P1E2112	Sensor B 'Output voltage of on-board charger' has a malfunction. There is a short circuit to positive Brand	Powertrain
Mercedes-Benz	P1E2192	Sensor B 'Output voltage of on-board charger' has a malfunction. The function or the instruction is faulty. Brand	Powertrain
Mercedes-Benz	P1E21A2	Sensor B 'Output voltage of on-board charger' has a malfunction. The system voltage is too low. Brand	Powertrain
Mercedes-Benz	P1E21A3	Sensor B 'Output voltage of on-board charger' has a malfunction. The system voltage is too high. Brand	Powertrain

6Related codes

Browse Pxxx codes or P1E2xx codes.