CHECK ENGINE灯亮了

[Scrambler]

机油正常，汽油箱盖没问题，还剩半箱油，反复启动过几次，灯还在亮。
3.1 MALIBU。
各位大虾分析分析，支支着。

[sludgegine]

没啥招儿,去车行查一下码再说. 华人车行好象免费给查.把码记住,回来报各位大虾知.

[养鱼小生]

请问那个车行能帮忙读码？
我车也才亮，郁闷死了

[Scrambler]

应该先查一下。谢谢啦。

[sludgegine]

作者: 养鱼小生

请问那个车行能帮忙读码？
我车也才亮，郁闷死了

一般华人车行都可以吧.

[sludgegine]

如果CODE出来了是P0440,那就看看下边的材料吧.

DTC P0440 Evaporative Emission (EVAP) System

System Description

For a more complete overview and system description, refer to Evaporative Emission (EVAP) Control System Operation Description .

The evaporative system includes the following components:

The fuel tank.
The EVAP vent valve/solenoid.
The fuel tank pressure sensor.
The fuel pipes and hoses.
The fuel fill cap.
The EVAP vapor lines.
The EVAP purge lines.
The EVAP canister.
The EVAP canister purge valve/solenoid.
The EVAP LARGE LEAK TEST Is based on applying vacuum to the EVAP system and monitoring vacuum decay. The PCM monitors vacuum level via the Fuel Tank Pressure Sensor input. At an appropriate time, the EVAP canister purge valve/solenoid and the EVAP vent valve/solenoid are turned on, allowing engine vacuum to draw a small vacuum on the entire evaporative emission system. If a sufficient vacuum level cannot be achieved, a large leak or a faulty EVAP canister purge valve/solenoid is indicated. This can caused by the following conditions:

Disconnected or faulty fuel tank pressure sensor.
Missing, not completely installed or faulty fuel fill cap.
Disconnected, damaged, pinched, or blocked EVAP purge line.
Disconnected or damaged EVAP vent hose.
Disconnected, damaged, pinched, or blocked fuel tank vapor line.
Disconnected or faulty EVAP canister purge valve/solenoid.
Disconnected or faulty EVAP vent valve/solenoid.
Open ignition feed circuit to the EVAP vent or purge valve/solenoid.
Damaged EVAP canister.
Leaking fuel sender assembly O-ring.
Leaking fuel tank or fuel filler neck
Any of the above conditions can set DTC P0440.

Conditions for Running the DTC

No TP sensor, ODM, IAT sensor, or MAP sensor DTCs set.
System voltage is between 9 and 16 volts.
Startup engine coolant temperature is between 4°C and 30°C (40°F and 86°F).
Startup engine coolant temperature is not more than 8°C (14°F) greater than startup intake air temperature.
Startup Intake air temperature is between 4°C and 30°C (40°F and 86°F).
Startup intake air temperature not more than 2°C (4°F) greater than start-up engine coolant temperature.
Fuel tank level is between 15% and 85%.
BARO is greater than 75kPa.
Conditions For Setting the DTC

The EVAP system is not able to achieve or maintain vacuum during the diagnostic test.

Action Taken When the DTC Sets

Important


Although this diagnostic is considered type A, it acts like a type B diagnostic. Whenever the EVAP diagnostics report that a system has passed, or if the battery has been disconnected, the diagnostic must fail during 2 consecutive cold start trips before setting a DTC. The initial failure is not reported to the diagnostic executive or displayed on a scan tool. A passing system always reports to the diagnostic executive immediately.

The PCM will store conditions which were present when the DTC set as Freeze Frame data.
The PCM will store conditions which were present when the DTC set as Fail Records data.
Conditions for Clearing the MIL/DTC

The PCM will turn the MIL OFF when the diagnostic has been run and the fault condition is no longer present.
A history DTC P0440 will clear after 40 consecutive warm-up cycles have occurred without a fault.
This DTC can be cleared by using the scan tool Clear Info function or by disconnecting the PCM battery feed.
The code will clear if the fill cap is tightened or Reinstalled.
Diagnostic Aids

Check for the following conditions:

Cracked or punctured EVAP canister.
Damaged or disconnected source vacuum line, EVAP purge line, vent hose or fuel tank vapor line.
Poor connection at the PCM.
Inspect harness connectors for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, and poor terminal to wire connection.
Damaged harness. Inspect the wiring harness to the EVAP vent valve/solenoid, the EVAP purge valve/solenoid, and the fuel tank pressure sensor for an intermittent open or short circuit.
Kinked, pinched or plugged vacuum source, EVAP purge, or fuel tank vapor line. Verify that the lines are not restricted.
Use the following procedure to check for a carbon release condition that could plug the system.
Turn off the ignition switch.
Remove the EVAP canister purge valve/solenoid. Refer to Evaporative Emission (EVAP) Canister Purge Valve Replacement .
Lightly tap the canister purge valve on a clean work area looking for carbon particles exiting either of the vacuum ports.
If no carbon release is evident, reinstall the components and continue with the DTC P0440 diagnostic table. If carbon is being released from either component, continue with this service procedure.
Remove the charcoal canister from the vehicle.
Ensure that the main cylinder valve is turned off on the J 41413 EVAP purge/pressure diagnostic station.
Disconnect the black hose that connects the nitrogen cylinder to the EVAP purge/pressure diagnostic station at the pressure regulator by unscrewing the knurled nut on the regulator. No tools are required to remove the black hose from the regulator.
Using a section of vacuum line, connect one end over the open threaded fitting of the EVAP purge/pressure diagnostic station pressure regulator.
Connect the remaining end to the purge valve end of the EVAP purge line at the vehicle and turn on the main nitrogen cylinder valve. Continue to blow any debris from the purge line for 15 seconds.
Return the EVAP Pressure/Purge Diagnostic Station to its original condition by reinstalling the black hose that was disconnected in step 7.
Replace the following components:
The EVAP canister purge valve. Refer to Evaporative Emission (EVAP) Canister Purge Valve Replacement .
The EVAP canister. Refer to Evaporative Emission (EVAP) Canister Replacement EVAP Canister.
Proceed with the DTC P0440 diagnostic table.

[sludgegine]

The evaporative leak detection diagnostic strategy is based on applying a vacuum to the EVAP system and monitoring the vacuum decay rate. The VCM monitors the vacuum level via the fuel tank pressure sensor input. At an appropriate time, the EVAP purge solenoid and the EVAP vent solenoid turn ON, allowing the engine vacuum to draw a small vacuum on the entire evaporative emission system. If a sufficient vacuum level cannot be achieved, a large leak or an EVAP system malfunction is indicated. The following conditions can cause this problem:

# A disconnected or malfunctioning fuel tank pressure sensor
# A missing, malfunctioning, improperly installed, or loose fuel cap
# A disconnected, damaged, pinched, or blocked EVAP purge line
# A disconnected or damaged EVAP vent hose
# A disconnected, damaged, pinched, or blocked fuel tank vapor line
# A disconnected or malfunctioning EVAP purge solenoid
# A disconnected or malfunctioning EVAP vent solenoid
# An open ignition feed circuit to the EVAP vent or purge solenoid
# A damaged EVAP canister
# A leaking fuel sender assembly O-ring
# A leaking fuel tank or fuel filler neck
Any of the above conditions can set a DTC P0440.

http://www.blazerforum.com/m_57194/tm.htm

[Scrambler]

没等查玛警告灯自动熄灭了。晕

[sludgegine]

作者: Scrambler

没等查玛警告灯自动熄灭了。晕

可能是gas cap loose.

[Scrambler]

U ARE RIGHT。

作者: sludgegine

可能是gas cap loose.