Bosch 0261230109 Pressure and Temperature Sensor

Bosch 0261230109 Pressure and Temperature Sensor

The Bosch 0261230109 is a high‑performance intake manifold pressure (MAP) sensor that also measures the temperature of the air entering the engine. Designed for modern gasoline and diesel engines, it delivers precise data to the engine control unit (ECU), enabling optimal fuel injection timing, boost management, and overall combustion efficiency.

Key Functionalities

• Dual‑functionality: Simultaneously measures manifold pressure and intake air temperature.
• High accuracy: Provides a voltage output that is directly proportional to the absolute pressure inside the intake manifold, with minimal error across the full operating range.
• Fast response time: Rapidly reacts to changes in engine load and throttle position, ensuring real‑time data for the ECU.
• Robust construction: Encased in a durable housing that resists high temperatures, vibration, and corrosive gases typical of automotive environments.

Technical Specifications

Installation Overview

Installing the Bosch 0261230109 is straightforward for technicians familiar with engine sensor replacement:

1. Disconnect battery: For safety, remove the negative terminal before working on electrical components.
2. Remove old sensor: Unscrew or release the existing MAP sensor from the intake manifold. Be careful not to damage the gasket or threads.
3. Prepare new sensor: Apply a thin layer of anti‑seize compound if recommended by Bosch, and install the new sensor using the supplied mounting hardware.
4. Reconnect wiring: Plug the 4‑pin connector into the ECU harness. Ensure proper alignment to avoid pin damage.
5. Reboot ECU: Reconnect the battery and allow the engine control unit to perform its self‑diagnostics. A successful sensor readout will confirm correct installation.

Performance Benefits

• Improved Fuel Efficiency: Accurate pressure readings enable precise fuel metering, reducing waste and emissions.
• Enhanced Engine Response: Quick sensor response translates to smoother throttle transitions and better acceleration.
• Reliability Under High Load: The robust design withstands high boost pressures in turbocharged engines without signal drift.
• Long‑Term Durability: Bosch’s proven manufacturing standards ensure a lifespan that matches or exceeds OEM expectations.

Common Applications

The sensor is widely used across various automotive platforms, including but not limited to:

• Volvo models such as the S60, V70, XC90, and others with inline‑four or inline‑five engines.
• Other OEM gasoline engines that require MAP input for fuel injection control.
• Diesel engines where accurate manifold pressure is critical for turbocharger regulation.

Maintenance Tips

• Regularly inspect the sensor connector for corrosion or loose pins; clean with electrical contact cleaner if necessary.
• Avoid exposing the sensor to excessive oil or coolant leaks, which can degrade performance.
• If the ECU reports a fault code related to MAP sensor (e.g., P0101), verify wiring continuity and sensor output before replacing.

Conclusion

The Bosch 0261230109 Pressure and Temperature Sensor is an essential component for modern engines that rely on precise manifold pressure and intake air temperature data. Its dual‑function design, high accuracy, and durable construction make it a reliable choice for both OEM installations and aftermarket replacements. By ensuring accurate sensor input, vehicle performance, fuel economy, and emissions compliance are all positively impacted.