25920615 1641251863 Tire Pressure Monitoring Sensors Fit for GMC

25920615 1641251863

High quality tpms

 For GMC

The first type: is blocked by carbon particles. At this time, the signal voltage of the oxygen sensor will be too high, and the engine computer will issue a command to reduce the amount of fuel injection, so that the mixture is too thin.
The second type :the dust and oil block the oxygen sensor and the through hole of the atmosphere. At this time, the signal voltage of the oxygen sensor will be low, and the engine voltage will instruct the injector to inject more oil, causing the mixture to be too rich.

Check the oxygen sensor for damage

Unplug the oxygen sensor's harness connector so that the oxygen sensor is no longer connected to the computer and the feedback control system is in open loop control. Connect the positive pen of the multimeter's voltage file directly to the oxygen sensor feedback voltage output terminal, and the negative test lead is well grounded. When measuring the feedback voltage during engine operation, first disengage the crankcase forced air pipe or other vacuum hose connected to the intake pipe, artificially form a lean mixture, while watching the voltmeter, the pointer reading should be lowered. Then connect the disconnected pipe, then pull off the water temperature sensor connector, replace the water temperature sensor with a 4-8KΩ resistor, artificially form a rich mixture, and watch the voltmeter, the pointer reading should rise. It is also possible to change the concentration of the mixture by suddenly pressing or releasing the accelerator pedal. When the accelerator pedal is suddenly depressed, the mixture becomes thicker and the feedback voltage should rise. When the accelerator pedal is suddenly released, the mixture becomes thinner. The feedback voltage should drop. If the feedback voltage of the oxygen sensor does not change as described above, it indicates that the oxygen sensor is damaged.
In addition, when the titanium oxide type oxygen sensor is detected by the above method, if it is a good oxygen sensor, the voltage at the output end should fluctuate up and down around 2.5V. Otherwise, the sensor can be removed and exposed to air, and its resistance value measured after cooling. If the resistance value is large, the sensor is good, otherwise the sensor should be replaced.

Inspection of the appearance color of the oxygen sensor

Remove the oxygen sensor from the exhaust pipe and check the vent hole on the sensor casing for blockage and damage to the ceramic core. If it is damaged, the oxygen sensor should be replaced.
The fault can also be judged by observing the color of the top part of the oxygen sensor:

1. light gray tip: this is the normal color of the oxygen sensor;
2 white top: caused by silicon pollution, at this time must replace the oxygen sensor; 

3 brown tip: caused by lead pollution, if serious, must also replace the oxygen sensor;
4 Black top: It is caused by carbon deposit. After removing the engine carbon deposit fault, the carbon deposit on the oxygen sensor can be automatically removed.

    OIL COOLER  CORE AND PAN                       OIL PAN                       SOLENOID VALVE                             ALTERNATOR

STARTER MOTOR                              CABIN AIR FILTER                        INTAKE MANIFOLD               POWER STEERING RACK

Huangshan benma group Co.,ltd. locates in Anhui, China. We specialized in auto electrical parts for Japanese car, America car, Korea car, etc.
Our main products are ignition coil, spark plugs, fuel injector, fuel pump, water pump, clock spring, Throttle body, Oil control valve, EGR valve, Idle valve, SCV valve, power window switch, Neutral Safety switch, oil pressure switch, door lock actuator, air flow sensor, ABS sensor, MAP sensor, TPS sensor, oxygen sensor, Crank&Cam sensor, parking sensor, Temperature sensor, Knock sensor and so on.
Sincerely welcome merchants at home and abroad to our company for business negotiation, sincerely wish to cooperate with you and co-create a win-win situation.

1. OEM Manufacturing welcome: Product, Package...
2. Sample order
3. We will reply you for your inquiry in 24 hours.
4. after sending, we will track the products for you once every two days, until you get the products. When you got the
goods, test them, and give me a feedback.If you have any questions about the problem, contact with us, we will offer
the solve way for you.

Q1. What is your terms of packing?
A: Generally, we pack our goods in neutral white boxes and brown cartons. If you have legally registered patent,
we can pack the goods in your branded boxes after getting your authorization letters.

Q2. What is your terms of payment?
A: T/T 30% as deposit, and 70% before delivery. We'll show you the photos of the products and packages
before you pay the balance. 

Q3. What is your terms of delivery?
A: EXW, FOB, CFR, CIF, DDU,CNF.

Q4. How about your delivery time?
A: Generally, it will take 7 to 30 days after receiving your advance payment. The specific delivery time depends
on the items and the quantity of your order.

Q5. Can you produce according to the samples?
A: Yes, we can produce by your samples or technical drawings. We can build the molds and fixtures.

Q6. What is your sample policy?
A: We can supply the sample if we have ready parts in stock, but the customers have to pay the sample cost and
the courier cost.

Q7. Do you test all your goods before delivery?
A: Yes, we have 100% test before delivery

Q8: How do you make our business long-term and good relationship?
A:1. We keep good quality and competitive price to ensure our customers benefit ;
2. We respect every customer as our friend and we sincerely do business and make friends with them,
no matter where they come from.