Fault code lookup

PowertrainP0129

Caution

Severity: Caution - get it checked when you can

Barometric Pressure Too Low

26 brands affected · Generic SAE J2012 description.

Key terms: Oxygen sensor: measures oxygen in the exhaust gas · Mass air flow sensor: measures the air going into the engine · SAE J2012: the standard generic code list · Powertrain: engine, transmission and emissions

1What it means in plain English

This code is in the fuel, air and oxygen sensor range, which also includes coolant temperature faults.

2Common causes

  1. Dirty or faulty mass air flow sensor
  2. Vacuum or intake air leak
  3. Weak fuel pump or clogged fuel filter
  4. Faulty fuel injector
  5. Faulty oxygen sensor
  6. Wiring or connector fault

3Can I drive?

Caution · drive with care

Have it diagnosed if the engine runs badly or the code keeps returning. Because this range includes coolant temperature sensors, watch the temperature gauge: if it climbs into the red, or the engine overheats or stalls, stop safely and get professional help.

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 26

BrandCodeDescriptionSystem
Ashok Leyland CVP0129Barometric Pressure Too Low SAEPowertrain
BAIC MotorP0129Barometric Pressure Too Low BrandPowertrain
BYDP0129Barometric Pressure Too Low BrandPowertrain
CheryP0129Barometric Pressure Too Low BrandPowertrain
DaewooP0129Barometric Pressure Too Low BrandPowertrain
DFFSP0129Barometric Pressure Too Low BrandPowertrain
DFFXP0129Barometric Pressure Too Low BrandPowertrain
DFXKP0129Barometric Pressure Too Low BrandPowertrain
EOBDP0129Barometertryck för lågt BrandPowertrain
GeelyP0129Barometric Pressure Too Low BrandPowertrain
GMP0129Barometric Pressure Too Low BrandPowertrain
Great WallP0129Barometric Pressure Too Low BrandPowertrain
HafeiP0129Barometric Pressure Too Low BrandPowertrain
HoldenP0129Barometric Pressure Too Low SAEPowertrain
HondaP0129Barometric Pressure Too Low SAEPowertrain
HyundaiP0129Barometric Pressure Too Low SAEPowertrain
IsuzuP0129Barometric Pressure Too Low SAEPowertrain
Land RoverP0129Barometric Pressure Too Low BrandPowertrain
OpelP0129Barometric Pressure Too Low BrandPowertrain
PeugeotP0129Barometric Pressure Too Low SAEPowertrain
PorscheP0129Umgebungsdruck - min BrandPowertrain
SaabP0129Barometric Pressure Too Low BrandPowertrain
MG (SAIC)P0129Barometric Pressure Too Low BrandPowertrain
SubaruP0129Atmospheric Pressure Sensor Range/Performance BrandPowertrain
TataP0129Barometric Pressure Too Low BrandPowertrain
ToyotaP0129Barometric pressure sensor signal fault BrandPowertrain

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.

5Related codes

  • P0120 Throttle/Pedal Position Sensor/Switch A Circuit
  • P0121 Throttle/Pedal Position Sensor/Switch A Circuit Range/Performance
  • P0122 Throttle/Pedal Position Sensor/Switch A Circuit Low Input
  • P0123 Throttle/Pedal Position Sensor/Switch A Circuit High Input
  • P0124 Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
  • P0125 Insufficient Engine Coolant Temperature for Closed Loop Fuel Control
  • P0126 Insufficient Engine Coolant Temperature for Stable Operation
  • P0127 Intake Air Temperature Too High
  • P0128 Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)
  • P012A Turbocharger/Supercharger Inlet Pressure Sensor Circuit
  • P012B Turbocharger/Supercharger Inlet Pressure Sensor Circuit Range/Performance
  • P012C Turbocharger/Supercharger Inlet Pressure Sensor Circuit Low

Browse Pxxx codes or P012xx codes.

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