P1198 – BMW DTC

BMW DTC P1198 – Differential Pressure Sensor Intake Manifold Circuit Low (Bank 1)

DTC P1198 meaning on BMW

The DTC P1198 code on a BMW indicates an issue with the Differential Pressure Sensor Intake Manifold Circuit on Bank 1. This sensor is responsible for measuring the pressure difference between the intake manifold and the atmosphere. A low voltage signal from this sensor triggers the P1198 fault code.

BMW DTC P1198 symptoms

Symptoms of a DTC P1198 on a BMW may include:

• Check Engine Light (CEL) illuminated on the dashboard
• Reduced engine performance
• Possible rough idling or stalling

BMW DTC P1198 causes

Common causes of the DTC P1198 code on a BMW include:

• Faulty Differential Pressure Sensor
• Wiring or connector issues in the sensor circuit
• Vacuum leaks in the intake manifold

BMW DTC P1198 seriousness

While the DTC P1198 code may not cause immediate drivability issues, it is important to address it promptly. Ignoring this fault code can lead to reduced engine performance and potential long-term damage if left unresolved.

How to diagnose DTC P1198 on BMW

To diagnose a DTC P1198 on a BMW, you can perform the following steps:

1. Use an OBD-II scanner to retrieve the fault code and freeze frame data
2. Inspect the wiring and connectors related to the Differential Pressure Sensor
3. Check for vacuum leaks in the intake manifold
4. Test the Differential Pressure Sensor for proper operation

How to fix DTC P1198 on BMW

To fix a DTC P1198 on a BMW, you can try the following solutions:

1. Replace the faulty Differential Pressure Sensor
2. Repair any damaged wiring or connectors in the sensor circuit
3. Address any vacuum leaks in the intake manifold
4. Clear the fault code and reset the Check Engine Light

How to erase DTC P1198 on BMW

To erase the DTC P1198 code on a BMW, you can use an OBD-II scanner to clear the fault code from the vehicle’s computer. Once the issue has been resolved and the fault code erased, the Check Engine Light should turn off.

Recommended tools & DTC Scanners for BMW

Best Diagnostic App for modern BMWs: BimmerLink

Recommended Bluetooth adapter for Bimmerlink: OBDLink CX

Cable adapter for Bimmerlink: Enet Cable USB Type C

For older BMWs we recommend: Autel AutoLink AL319 (2024 version)

Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter

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