PowertrainP204A

Caution

Severity: Caution - get it checked when you can

Reductant Pressure Sensor Circuit

25 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

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

Have it diagnosed promptly. If the car runs and drives normally, drive gently to a workshop. If it runs badly, stalls, overheats, loses oil pressure, or a warning light is flashing or red, stop safely and get professional help. If the code concerns the brakes, brake vacuum or brake assist, do not drive until it is checked: a hard pedal or longer stopping distance means stop.

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 25

Brand	Code	Description	System
Ashok Leyland CV	P204A	Hybrid Battery. Voltage Sensor. (Sensor N.) - Low Signal Brand	Powertrain
BAIC Motor	P204A	Reductant Pressure Sensor Circuit Brand	Powertrain
Mercedes-Benz	P204A	Reductant Pressure Sensor Circuit SAE	Powertrain
BYD	P204A	Reductant Pressure Sensor Circuit Brand	Powertrain
Chery	P204A	Reductant Pressure Sensor Circuit Brand	Powertrain
Daewoo	P204A	Reductant Pressure Sensor Circuit Brand	Powertrain
DFFS	P204A	Reductant Pressure Sensor Circuit Brand	Powertrain
DFFX	P204A	Reductant Pressure Sensor Circuit Brand	Powertrain
DFXK	P204A	Reductant Pressure Sensor Circuit Brand	Powertrain
EOBD	P204A	Reductant rõhuanduri ahel Brand	Powertrain
Geely	P204A	Reductant Pressure Sensor Circuit Brand	Powertrain
GM	P204A	Reductant Pressure Sensor Circuit Brand	Powertrain
Great Wall	P204A	Reductant Pressure Sensor Circuit Brand	Powertrain
Hafei	P204A	Reductant Pressure Sensor Circuit Brand	Powertrain
Hyundai	P204A	Reductant Pressure Sensor Circuit SAE	Powertrain
Isuzu	P204A	Reductant Pressure Sensor Circuit SAE	Powertrain
Land Rover	P204A	Reductant Pressure Sensor Circuit Brand	Powertrain
Opel	P204A	Reductant Pressure Sensor Circuit Brand	Powertrain
Peugeot	P204A	Reductant Pressure Sensor Circuit SAE	Powertrain
Saab	P204A	Reductant Pressure Sensor Circuit Brand	Powertrain
MG (SAIC)	P204A	Reductant Pressure Sensor Circuit Brand	Powertrain
Smart	P204A	Reductant Pressure Sensor Circuit SAE	Powertrain
Tata	P204A	Reductant Pressure Sensor Circuit SAE	Powertrain
Toyota	P204A	Reductant pressure sensor circuit Brand	Powertrain
Volkswagen	P204A	Reductant pressure sensor circuit: electrical malfunction; No signal/communication 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 7

These 7-character codes are manufacturer-specific variants of P204A and may be reported by some scan tools.

Brand	Code	Description	System
SsangYong	P204A11	AdBlue/DEF pressure sensor voltage low Brand	Powertrain
SsangYong	P204A12	AdBlue/DEF pressure sensor voltage high Brand	Powertrain
Volvo	P204A1C	No description available	Powertrain
SsangYong	P204A23	AdBlue/DEF pressure sensor offset low Brand	Powertrain
SsangYong	P204A24	AdBlue/DEF pressure sensor offset high Brand	Powertrain
Mercedes-Benz	P204A29	23152,535,S_RAG_PRS_NOT_VLD: Der Spannungswert liegt außerhalb des zulässigen Bereiches. Symptom-Name: RAG_PRS_NOT_VLD Brand	Powertrain
Sprinter	P204A29	23152,535,S_RAG_PRS_NOT_VLD: Der Spannungswert liegt außerhalb des zulässigen Bereiches. Symptom-Name: RAG_PRS_NOT_VLD Brand	Powertrain

6Related codes

Browse Pxxx codes or P204xx codes.