Q: code p0129

asked by on

check engine light came on early this morning had no blinking etc light vehicle ran completely fine the went back out and check engine light was off so i put a obd 2 on it code came up p0129 "barometric pressure is low' what is the possible cause

My car has 147668 miles.
My car has an automatic transmission.

Hello, thank you for writing in. The vehicle is likely having an issue with the air intake sensors. The point of this sensor is to detect atmospheric pressure, which in other terms means a measurement of the oxygen available in the air so that the computer make regulate the fuel/air mixture perfectly. This is either measured by the BPS or MAF sensor. On your specific vehicle it should be measured with the Mass Airflow Sensor. You may want to start by checking the wiring connection the sensor to the computer, but the sensor does fail eventually. It is also possible the sensor is dirty and needs to be cleaned. You will likely see more faults from the sensor continue to arise if it is not resolved. With that being said, you will want to have the sensor replaced if cleaning does not solve the issue. For more diagnostic or repair help, contact our service department to schedule an appointment.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: module or unit?

Hi there. From the description you have provided, your vehicle Check Engine Light on with lots of warnings and exterior lighting acting weird, sounds like there may be a charging system related problem. I would recommend not driving your vehicle...

Q: Codes P0129 and P0175.

Hello. Thank you for writing in. With the codes you are receiving, and due to the order in which they triggered, you will want to focus on the P0129 MAP sensor reading. The Manifold Absolute Pressure sensor uses a 5...

Q: Rear making noise

A bad pinion bearing will make a howling type sound from the rear end if it is failing. Wheel bearings at either end of the differential will have the classic growling sound coming from either side of the rear differential....

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...