P1103代码定义

The Powertrain Control Module (PCM) stores a P1103 trouble code when the voltage signal from the Mass Air Flow (MAF) sensor is higher than normal but still falls within the range specified by the manufacturer. In addition to a P1103 trouble code, other related codes the PCM might store include a P1100, P1101, P1102, and P1104 code.

What the P1103 code means

The MAF sensor sends data to the PCM in the form of a voltage signal. If the PCM receives a voltage signal from the MAF sensor that is higher than what the manufacturer has specified but the signal still falls within established parameters, a P1103 trouble code is stored and thecheck engine light illuminates。

What causes the P1103 code?

A common cause of a P1103 trouble code is faulty or loose wiring and connectors within the MAF sensor wiring harness. In addition to this, a leak in the vacuum system, either before or after the MAF sensor, can cause the PCM to store this code.A clogged MAF sensor screen or a dirty or bad MAF sensor是代码存储的其他可能原因。

P1103代码的症状是什么？

Symptoms of a P1103 trouble code include stalling when idling, an erratically running engine, and reduced power while accelerating. In addition, a vehicle can suffer from reduced fuel efficiency from the conditions that cause a P1103 trouble code.

How does a mechanic diagnose the P1103 code?

To diagnose the P1103 trouble code, a mechanic needs to use an advanced scanner, an evaporative smoke tester, and a digital volt/ohm meter. Once the mechanic has the necessary equipment, they need to perform the following steps:

• Inspect all wiring, connectors, and components associated with the MAF sensor, including the wiring harness. The mechanic is looking for any damaged, loose, or faulty wiring, connectors, or components when doing this inspection.
• 卸下空气过滤器并确定是否需要更换。
• While the mechanic has the air filter out, they should carefully remove the MAF sensor for cleaning with a CRC 05110 spray cleaner.
• 接下来，一旦清洁，修理或更换所有组件，机械师应清除代码并在车辆运行时测试系统，以查看代码是否返回。
• If the code returns, the mechanic should first download any freeze frame data and stored trouble codes and then perform a smoke test to check for leaks within the vacuum system using an evaporative smoke tester.
• Then they should clear the code after fixing any leaks and see if the code returns.
• If the code returns, they should use a digital volt/ohm meter to test the voltage and ground signal of the MAF sensor.
• 如果MAF传感器处没有电压或接地信号，则机械师应断开PCM的连接，并检查MAF传感器和电路的连续性。机械师还应测试MAF传感器电路和PCM之间的连续性。
• Once all of the necessary repairs are made, the mechanic should clear the code and retest the system to see if the code returns.

Common mistakes when diagnosing the P1103 code

P1103故障代码诊断的一个错误是，机械师在不检查故障，损坏或松动的情况下更换MAF传感器。结果是问题没有解决，代码返回。

How serious is the P1103 code?

While a vehicle can still operate with a P1103 trouble code stored, the erratic running condition of the engine and the subsequent stalling while idling can make the vehicle difficult to drive. The reduced fuel efficiency also leads to more costs when putting fuel into the vehicle. Because of this, it is recommended that you deal with a P1103 trouble code as soon as possible.

What repairs can fix the P1103 code?

维修P1103故障代码需要机械师来执行以下操作：

• Replace anyfaulty or damaged wiring, connectors, or components在MAF传感器线束内。除了维修和更换物品外，机械师还应检查任何松动的接线和连接器。
• If the air filter is dirty upon inspection,机械师应该用新的机械师代替。
• 此外，在重新安装空气过滤器之前，机械师应使用CRC 05110喷雾清洁器清除并清洁MAF传感器。卸下传感器时，机械师应小心，以免损坏连接线的细腻接线。
• 然后，他们应修复真空系统中的任何空气泄漏。
• Next,他们应该更换MAF传感器if further testing determines it is bad.
• If the PCM tests as bad, the mechanic should replace that component as well. Replacing the PCM requires the mechanic to program it upon installation.

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