[Thảo luận] Mazda MPV 2001 Có vấn đề

[gierado]

Chào các bác. Em có chiếc Mazda MPV 2001 mỗi khi đề máy xong là nó hiện lên đèn màu vàng báo là check engine.Em có đem ra thợ thì nó báo hư P0031 bank1 sensor1. Không biết có đúng không ? Nếu sửa chữa thì họ lấy 3.500.000 luôn tiền công. vậy các bác cho biết giá đó có đắt không? mà em cũng không biết món đồ đó là gì và nó nằm ở đâu. Hiện tại là xe vẩn chạy bình thường. Mong các bác chỉ dẩn. Em ở Saigon

 

[Mèo sạch thỉu]

Em thấy tây nó dậy như sau :
P0031 - Oxygen (A/F) Sensor Heater Control Circuit Low (Bank 1 Sensor 1)

OBD-II Trouble Code Technical Description

Oxygen (A/F) Sensor Heater Control Circuit Low (Bank 1 Sensor 1)
What does that mean?

A P0031 DTC (diagnostic trouble code) refers to the O2 sensor (oxygen sensor) located on Bank 1 in front of the catalytic converter. There is also an oxygen sensor behind the converter which is Sensor #2.
This O2 sensor #1 may also be refered to as an air/fuel ratio sensor since on some vehicles it is. It detects the amount of oxygen in the exhaust gas compared to the outside air and then vehicle's computer adjusts the air/fuel ratio going into the engine. The sensor is less effective when the exhaust gas temperature is low, so it includes a heater which is activated to help get better readings from the A/F O2 sensor. Essentially this P0031 code means that the resistance of the heater circuit is lower than normal. In most cases, that resistance level must fall below 0.8 A to trigger the DTC code.
Note, this code is very similar in nature to P0032, P0051, and P0052
Potential Symptoms

Most likely you'll not notice any symptoms other than the MIL (malfunction indicator lamp, a.k.a. the check engine light) will illuminate.
Causes

A P0031 DTC trouble code may be caused by one or more of the following:

• <LI itxtvisited="1">A short or open in the heater circuit in the sensor <LI itxtvisited="1">A failed O2 sensor heater <LI itxtvisited="1">Wiring/connectors broken/frayed leading to sensor and/or relay
• Failed PCM/ECM

Possible Solutions

To fix a P0031 DTC code, you'll need to do a proper diagnosis. To do that, you'll want to inspect the wiring and connectors leading to the sensor. Also if equipped with a heater relay and fuse, you'll want to check those as well. Use a digital volt ohm meter to:

• <LI itxtvisited="1">check for 12 volts at the heater circuit feed (hint: unplug the sensor and check at the wiring connector to do this measurement) <LI itxtvisited="1">check the ground circuit for continuity <LI itxtvisited="1">measure the resistance of the heater circuit (done on the sensor itself)
• measure the resistance and voltage of the wiring

Refer to a service manual for the correct specifications (volts, ohms) for your vehicle. On some Toyota vehicles this code is triggered when the resistance of the heater circuit is below 0.8 A.
With that said, a common fix for this DTC is to replace the air/fuel (O2 oxygen) sensor #1 on bank 1.
Please keep in mind that OEM (original equipment) replacement sensors are recommended (from the dealer). Aftermarket sensors can be less reliable and of poorer quality (not always, but more often). There's also a chance that replacement parts for the P0031 code may also fall under a federal emissions warranty (check with your dealer to see if it's covered).

Nôm na là cảm biến oxy của bác bị báo hỏng, có mấy cách:
- kiểm tra lại dây
- đo lại điện trở của cảm biến
- hai bước trên mà không xong thì .. thay
Để e kiểm tra xem cảm biến giá thật nó bao nhiêu rồi ới để bác tham khảo nhá

 

[gierado]

Cám ơn bác. Thế bác giúp em giá cả bao nhiêu nhé để cho em biết phòng tránh bị cắt cổ. Cám ơn bác