PowertrainP1594

Caution

Severity: Caution - get it checked when you can

Charging Sys Voltage Too Hi

16 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 16

Brand	Code	Description	System
Chery	P1594	Camshaft Adjustment Oil Temp Sensor (G277): Short to Plus Brand	Powertrain
Daewoo	P1594	Charging Sys Voltage Too Hi Brand	Powertrain
DFXK	P1594	Camshaft Adjustment Oil Temp Sensor (G277): Short to Plus Brand	Powertrain
EOBD	P1594	Chyba ECU Brand	Powertrain
Geely	P1594	Camshaft Adjustment Oil Temp Sensor (G277): Short to Plus Brand	Powertrain
GM	P1594	Charging Sys Voltage Too Hi Brand	Powertrain
Honda	P1594	No description available	Powertrain
Hyundai	P1594	No description available	Powertrain
Isuzu	P1594	No description available	Powertrain
Land Rover	P1594	Forced Engine Shutdown - Remote Start System Fault_ No Unattended Vehicle Timeout Brand	Powertrain
Peugeot	P1594	No description available	Powertrain
Porsche	P1594	No description available	Powertrain
Proton	P1594	No description available	Powertrain
Saab	P1594	Charging Sys Voltage Too Hi Brand	Powertrain
Subaru	P1594	AT Diagnosis Input Signal Circuit Malfunction Brand	Powertrain
Tata	P1594	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 2

These 7-character codes are manufacturer-specific variants of P1594 and may be reported by some scan tools.

Brand	Code	Description	System
Mercedes-Benz	P159400	Sensor Abgasdruck Mindestdruck Brand	Powertrain
Hyundai	P159400	If abnormal 2WD, 4WD automatic recognition signal is detected under engine 'ON', ECM sets DTC Brand	Powertrain

6Related codes

Browse Pxxx codes or P159xx codes.