The sensor on the car is broken, how to repair it?

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The sensor on the car is broken, how to repair it?

1

Inlet pressure temperature sensor damage phenomenon

① ON gear, the engine fault light is often on;

② When you step on the accelerator in place, a small amount of black smoke is taken, and a large amount of black smoke is accelerated quickly;

③ The engine is boring;

④ failure code: P01D6 (the voltage of the intake pressure sensor is lower than the lower limit)

Cause Analysis:

The air intake pressure signal is abnormal, and the ECU cannot receive the correct intake amount information, resulting in the abnormal amount of fuel injection, then the combustion is not sufficient, the engine is weak, and the black smoke is rolled out during the refueling process. The connection between the cable beam and the failure of the sensor will cause the failure.

solution:

Check the pressure temperature sensor of the air intake.

2

Water temperature sensor damage phenomenon

② The water temperature of ON always shows the maximum value of 120 ° C;

③ The engine is limited and boring;

④ failure code: P003D (water temperature sensor voltage is lower than the lower limit value)

The water temperature sensor fails, and the ECU detects the alternative value when the output signal of the water temperature sensor is not credible. ECU limits the engine torque for the purpose of protecting the engine.

Check the water temperature sensor.

3

Machine oil pressure sensor damage phenomenon

① After starting, the oil pressure indicator light is often on;

② The engine fault light is often on;

③ idle speed, the oil pressure value of the oil is displayed at 0.99;

④ failure code: P01CA (voltage of oil pressure sensor than the upper limit)

The oil pressure sensor probe was severely damaged. The ECU detected that the oil pressure sensor had no connection, and the display value of the instrument was an internal replacement value of the ECU.

Check the oil pressure sensor.

4

OBD socket terminal contact is poor phenomenon

① ON file, the diagnostic instrument is normal, but it cannot enter the ECU to read the relevant information;

② No fault code.

: OBD socket terminal exits, resulting in poor contact, diagnostic instrument and ECU cannot communicate.

Check the OBD socket terminal.

5

Nitrogen oxygen sensor wire beam short circuit phenomenon

① After starting, OBD fault lights are often on;

② The engine is limited and boring;

③ Failure code: P0050 (downstream nitrogen oxygen sensor CAN signal receiving timeout), P018C (downstream nitrogen oxygen sensor preparation timeout).

The nitrogen oxygen sensor wiring beam is worn, short -circuit ground, and nitrogen oxygen sensors cannot work properly, resulting in exceeding the standard emissions, engine restrictions, and system alarm.

Check the nitrogen oxygen sensor wire beam.

6

Relax heating relay box damage phenomenon

① After starting, OBD fault light is on;

② Failure code: P028F (Hyeper pressure pipe heating relay control terminal opening failure).

Wire beam breaks fault.

Check the heating relay box wire.

7

Urea supply unit driving circuit fails phenomenon

③ Failure code: P3006 (Drive circuit of the urea supply unit opening the road failure)

④ Do not consume urea

The urea pump control line breaks are specifically manifested as the 10th pins of the urea pump electrical interpolation. The urea pump does not work. The system cannot spray the urea normally, resulting in excessive emissions, engine limitation, and system reporting.

Check the connection of the urea pump line.

8

The bottom -layer software error does not send a speed signal phenomenon

① When the uphill or rapid acceleration, the engine’s dynamicity will have a short decrease of 1-2s;

During the driving process, the speed signal sent by the instrument suddenly decreased to 0, and the changes in the speed signal caused the ECU to control the change of oil volume and generate instantaneous oil -breaking phenomena.

Solution: If the instrument number of the car matches is 3820010-61B, please update to the latest version of the instrument, the part number is 3820010D61B.

9

SCR system urea reflux tube blocking failure phenomenon

③ Failure code: P0207 (urea return tube of SCR system to block the fault);

The obstruction of the miscellaneous objects in the urea reflux tube causes the system to be unable to spray urea normally, excessive emissions, engine restrictions, and system alarm.

Check the urea reflux tube (urea pump to the urea tube between urea boxes).

10

Urea reflux heating pipeline plug -in terminal socket phenomenon

② Failure code: P0287 (Urea reflux pipeline heating relay load and power supply line occurs or short -circuit faults on the ground).

Pull off the plug -in of the urea to heat the reflux pipe and find that the terminal is crooked.

Solution: Fix the terminal and re -insert the plug -in.

11

Hyeper pressure pipeline open path failure phenomenon

② Failure code: P028E (Urea pressure pipe heating relay load and power supply line occurs or short -circuit faults on the ground);

③ The engine may be twisted and boring in winter.

The pressure tube of the urea pump is heated, causing the urea in winter to not normally heated urea, and at the same time, the alarm is systematically alarm.

Check the pressure tube of the urea pump (the urea pipe from the urea pump to the urea nozzle).

汽车上的传感器坏了,怎么修?

12

Urea absorption pipeline open path failure phenomenon

② Failure code: P029A (Urea inhalation of pipeline heating relay load and power supply line occurs or short -circuit faults on the ground);

The urea pump inhalation tube is heated, causing the urea in winter to not normally heated urea, and at the same time, the alarm is systematically alarm.

Check the urea pump (the urea pipe from the urea box to the urea pump).

13

Urea return pipe road failure phenomenon

The urea pump back pipe is heated, which causes the urea in winter to not normally heated urea, while systematically alarm.

Check the urea pump back pipe (urea pipe from urea pump to urea box).

14

The position of urea pump electrical connection plugin leaks urea phenomenon

③ Do not consume urea;

④ Fault code: P0227, P0228, P01FC, P01FB, P02B1, P02A1, P01FA, P01FB (corresponding information corresponding information, please check

Inquiry of “Code Bar” of the Menu Bar “Below of Jiangmin Software

To.

The urea pump electrical plug -in leaks urea and corrodes metal pins, causing a short circuit and disconnection failure in the line. (In severe cases, the rail pressure sensor will be burned.

Check the urea pump electrical plug and replace the damaged parts.

15

The phenomenon of the wiring of the temperature sensor line break

④ failure code: P027B (SCR catalyst upstream temperature sensor signal voltage is too high).

The wire beam of the temperature discharge sensor is broken, and the ECU cannot obtain the upstream exhaust temperature of the SCR catalyst, which causes the urea pump to do not build pressure and does not consume urea, which leads to exceeding the discharge standard.

Fix the cable beam and bandage.

16

Caushaft sensor and oil volume metering unit plug -in loading phenomenon

汽车上的传感器坏了,怎么修?

① The highest speed is limited to 1800rpm;

② The startup time is too long;

③ Failure code: P00EF (no signal of crankshaft sensor), P01E2 (opening the pressure valve was opened).

The crankshaft sensor and the oil volume metering unit are connected to the plug -in, and the ECU cannot provide normal signals to the ECU.

Plug -in plug -in for the regulating axis sensor and oil volume metering unit.

17

Urea box anti -freezing fluid solenoid valve is constant phenomenon

The temperature of the urea box is high, and the urea box is discharged from urea.

During the driving, the urea box anti -freezing solenoid valve is often through, that is, the antifreeze has been thawing the urea box.

① There are impurities in the coolant, accumulated near the film, and the debris squeezing the film form a concave pit to affect the seal;

② The operating pressure range of the solenoid valve does not match the actual pressure value. (The current electromagnetic valve operating pressure is 20kPa to 250kPa. The actual pipeline pressure may be lower than 20kPa, and the membrane sheet cannot be compressed and can not be effectively sealed) when it is lower than 20kPa).

Change the solenoid valve assembly to the latest version according to the parts directory.

18

The concentration limit of nitrogen oxygen sensor of the engine tablets is too sensitive

The Russian J6 export vehicle (common rail system), nitrogen oxygen sensor error reporting is the highest frequency, and similar problems in domestic co -rail systems also occur:

③ Failure code: P01FC: NOX peak check failure, P01ff: Nox incremental check failure.

Nitrogen oxides NOX concentration limit calibration is unreasonable, and the threshold value is too sensitive. The peak calibration limit should be changed from 200ppm to 50ppm, and the signal change range is changed from 400ppm to 50ppm.

Write the latest version data.

19

Urea supply unit motor speed deviation permanent failure phenomenon

①OBD lights are on, no limit to twisting;

② Failure code: P02AB (permanent failure of urea supply unit motor speed deviation).

Damage to urea pump motors.

Replace the BOSCH 2.2-generation urea pump 1161010-51B.

20

Crystal phenomenon of urea nozzles

The urea nozzle is uniform crystal, and the middle spray hole is not blocked and can be ventilated.

The urea nozzle has a local spin, causing a thin layer of urea crystal.

It belongs to normal phenomenon, if it does not affect emissions, no need to deal with.

twenty one

Crystal phenomenon at the inlet of the processor inlet

The post -processor inlet is uniformly crystal, without large crystalline urea.

During use, a thin layer of urea crystals will be generated near the post -processor and the intake pipe interface.

汽车上的传感器坏了,怎么修?

twenty two

After processing the quality problem of intake control parts

①OBD light lit;

② The vehicle is limited to weakness;

③ Urea is not consumed.

The urea nozzle is shifted when welding and the exhaust pipe, and “double eyelids” appear, causing urea crystals, and then blocking the exhaust pipe.

Postering the “double eyelid” site.

twenty three

Crystallization of urea nozzle head

④ The head of the urea nozzle is crystal, and the spray hole is blocked.

汽车上的传感器坏了,怎么修?

The angle between the urea nozzle and the exhaust pipe does not meet the BOSCH system engineering design specifications.

Replace the exhaust pipe in a new state.

twenty four

The camshaft sensor plugin is not inserted, resulting in difficulty in the engine startup

② The engine is difficult to start;

汽车上的传感器坏了,怎么修?

③ Failure code: P0032 — CAN B passive fault, P00EC — not detected camshaft signals.

① CAN B passive failure is a data problem that should be blocked;

② No camshaft signal, which makes it impossible to determine the cylinder number accurately when starting, making it difficult to start.

① For the P0032 failure, re -write the latest version of the electronic control data released after September 2014 to block the fault code;

② For P00EC faults, check the camshaft sensor to connect the plug -in.

① ON gear, the engine fault light is often on;

汽车上的传感器坏了,怎么修?

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汽车上的传感器坏了,怎么修?

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② No fault code.

① After starting, OBD fault lights are often on;

① After starting, OBD fault lights are often on;

① After starting, OBD fault lights are often on;

① After starting, OBD fault lights are often on;

① After starting, OBD fault lights are often on;

① After starting, OBD fault lights are often on;

① After starting, OBD fault lights are often on;

① After starting, OBD fault lights are often on;

① After starting, OBD fault lights are often on;

② The engine is limited and boring;

② The engine is limited and boring;

② The engine is limited and boring;

② The engine is limited and boring;

② The engine is limited and boring;

② The engine is limited and boring;

① After starting, OBD fault light is on;

① After starting, OBD fault light is on;

④ Do not consume urea

② Failure code: P0287 (Urea reflux pipeline heating relay load and power supply line occurs or short -circuit faults on the ground).

③ The engine may be twisted and boring in winter.

③ The engine may be twisted and boring in winter.

③ Do not consume urea;

③ Do not consume urea;

It belongs to normal phenomenon, if it does not affect emissions, no need to deal with.

In order to answer your doubts, the above is what we have organized about nox sensor for isuzu, hope it can help you.