PowertrainP0721

Caution

Severity: Caution - get it checked when you can

Output Speed Sensor Circuit Range/Performance

35 brands affected · Generic SAE J2012 description.

Key terms: SAE J2012: the standard generic code list · Powertrain: engine, transmission and emissions

1What it means in plain English

This range normally covers the transmission control system, but some manufacturers use P07-P09 codes for unrelated functions (fuel pump control, air-mix motors, lighting or windows). Check the description before assuming it is a transmission fault.

2Common causes

Low or dirty transmission fluid
Faulty shift solenoid
Faulty speed sensor
Wiring or connector fault
Internal transmission wear

3Can I drive?

Caution · drive with care

If the transmission slips, jerks, will not shift, or a transmission temperature warning is on, stop driving and let it cool: continuing can cause expensive damage. If the code names a different system (for example the fuel pump), treat it on its own terms; a fuel-pump control failure can stall the car, so have it checked before driving further. Otherwise drive gently 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 35

Brand	Code	Description	System
Ashok Leyland CV	P0721	Output Speed Sensor Circuit Range/Performance SAE	Powertrain
BAIC Motor	P0721	Secondary pulley speed implausible Brand	Powertrain
Mercedes-Benz	P0721	Output Speed Sensor Circuit Range/Performance SAE	Powertrain
BMW	P0721	Output Speed Sensor Circuit Range/Performance Brand	Powertrain
BYD	P0721	Secondary pulley speed unplausible Brand	Powertrain
Chery	P0721	Output shaft speed out of software limit Brand	Powertrain
Chrysler	P0721	Output Speed Sensor Circuit Performance Brand	Powertrain
Daewoo	P0721	Output Speed Sensor Circuit Range/Performance Brand	Powertrain
DFFS	P0721	Vehicle speed data failure Brand	Powertrain
DFFX	P0721	Output Speed Sensor Circuit Range/Performance Brand	Powertrain
DFXK	P0721	Output Speed Sensor Circuit Range/Performance Brand	Powertrain
EOBD	P0721	Julat/prestasi litar sensor kelajuan aci output Brand	Powertrain
Fiat	P0721	Output speed sensor circuit performance Brand	Powertrain
Geely	P0721	Output shaft speed sensor value Brand	Powertrain
GM	P0721	capteur de vitesse de sortie Performance Brand	Powertrain
Great Wall	P0721	Secondary pulley speed unplausible Brand	Powertrain
Hafei	P0721	Output Speed Sensor Circuit Range/Performance Brand	Powertrain
Holden	P0721	Output Speed Sensor Performance Brand	Powertrain
Honda	P0721	Output Speed Sensor Circuit Range/Performance SAE	Powertrain
Hyundai	P0721	Output Speed Sensor Circuit Range/Performance SAE	Powertrain
Isuzu	P0721	Output Speed Sensor Circuit Range/Performance SAE	Powertrain
Land Rover	P0721	will also be logged Brand	Powertrain
Mahindra	P0721	Output Speed Sensor Circuit Range/Performance SAE	Powertrain
Maserati	P0721	Output Shaft Speed Sensor Circuit Performance Brand	Powertrain
Nissan	P0721	Output Speed Sensor Circuit Range/Performance SAE	Powertrain
Opel	P0721	capteur de vitesse de sortie Performance Brand	Powertrain
Peugeot	P0721	Output Speed Sensor Circuit Range/Performance SAE	Powertrain
Proton	P0721	Output Speed Sensor Circuit Range/Performance SAE	Powertrain
Saab	P0721	Antriebsdrehzahlsensor Leistung Brand	Powertrain
MG (SAIC)	P0721	Output Speed Sensor Signal too High Brand	Powertrain
Sprinter	P0721	Output Speed Sensor Circuit Range/Performance SAE	Powertrain
Subaru	P0721	Output Speed Sensor Circuit Range/Performance SAE	Powertrain
Suzuki	P0721	Output Speed Sensor Circuit Range / Performance - Value of Signal Protection Calculation Incorrect Brand	Powertrain
Tata	P0721	Gear 2 Incorrect Ratio Brand	Powertrain
Toyota	P0721	Output speed sensor electrical fault (circuit short to ground or open) 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 4

These 7-character codes are manufacturer-specific variants of P0721 and may be reported by some scan tools.

Brand	Code	Description	System
Porsche	P072100	Se surgir o erro juntamente com o código de erro P073100...P073500, a causa deverá ser uma bomba de óleo da transmissão com defeito mecânico Brand	Powertrain
SsangYong	P072100	Output revolution sensor above upper limit Brand	Powertrain
Mercedes-Benz	P072125	Rpm sensor 'Output shaft' has a malfunction. There is a faulty signal waveform. Brand	Powertrain
Mercedes-Benz	P072126	Rpm sensor 'Output shaft' has a malfunction. The signal change rate is below the permissible limit value. Brand	Powertrain

6Related codes

Browse Pxxx codes or P072xx codes.