P0105 Mercedes-Benz Code - Manifold Absolute Pressure/Barometric Pressure Circuit Malfunction
Quick Answer
The Manifold Absolute Pressure (MAP) sensor measures the pressure inside the intake manifold. Common causes include Faulty Manifold Absolute Pressure (MAP) Sensor, Manifold Absolute Pressure Sensor harness is open or shorted, Manifold Absolute Pressure Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0105 Mercedes-Benz indicates Manifold Absolute Pressure/Barometric Pressure Circuit Malfunction.
- Common causes
- Common causes include Faulty Manifold Absolute Pressure (MAP) Sensor, Manifold Absolute Pressure Sensor harness is open or shorted, Manifold Absolute Pressure Sensor circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P0105 Mercedes-Benz Description
The MAP sensor wiring includes 3 circuits. The Engine Control Module (ECM) supplies a regulated 5 volts to the sensor on a 5 V reference circuit. The ECM supplies ground on a low reference circuit. The MAP sensor provides a signal voltage to the ECM, relative to the pressure changes, on the MAP sensor signal circuit. The ECM converts the signal voltage input to a pressure value.
Under normal operation the greatest pressure that can exist in the intake manifold is at ignition ON, engine OFF, which is equal to the BARO. The lowest manifold pressure occurs when the vehicle is idling or decelerating. The ECM monitors the MAP sensor signal for pressure outside of the normal range.
The Diagnostic Trouble Code (DTC) will be set when the ECM receives an excessively low or high voltage from the MAP Sensor.
What are the Possible Causes of the DTC P0105 Mercedes-Benz?
- Faulty Manifold Absolute Pressure (MAP) Sensor
- Manifold Absolute Pressure Sensor harness is open or shorted
- Manifold Absolute Pressure Sensor circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0105 Mercedes-Benz?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0105 Mercedes-Benz code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P0105 Mercedes-Benz Code
1. What are common symptoms of OBDII code P0105 in a Mercedes-Benz?
- Common symptoms include rough idle, engine hesitation, poor acceleration, decreased fuel efficiency, and possible stalling.
2. What does the OBDII code P0105 for a Mercedes-Benz indicate?
- The code indicates a malfunction in the Manifold Absolute Pressure (MAP) sensor circuit or the Barometric Pressure (BARO) sensor circuit.
3. What are possible causes of the P0105 code in a Mercedes-Benz?
- Possible causes include a faulty MAP sensor, BARO sensor, damaged wiring or connectors, vacuum leaks, or issues with the engine's intake system.
4. How can I diagnose the P0105 code in my Mercedes-Benz?
- Diagnosing the code typically involves using a scan tool to check for the code, examining the sensor's wiring and connections, and testing the sensor's output using a multimeter.
5. Can I drive my Mercedes-Benz with the P0105 code present?
- It is not recommended to drive your vehicle with the P0105 code present, as it can lead to poor engine performance and potential long-term damage if left unresolved.
6. How can I repair the P0105 code in my Mercedes-Benz?
- Repair options may include replacing the faulty MAP or BARO sensor, repairing damaged wiring or connectors, fixing any vacuum leaks, or cleaning the sensor and its connections.
7. Is it possible to reset the P0105 code in a Mercedes-Benz without repairing the issue?
- While you can clear the code temporarily, it will likely return if the underlying issue is not addressed. It is best to diagnose and repair the problem to prevent further issues.
8. Are there any DIY tips for resolving the P0105 code in a Mercedes-Benz?
- DIY tips may include checking and cleaning sensor connections, inspecting for visible damage to wiring, and ensuring there are no vacuum leaks in the intake system.
9. Can a mechanic help me fix the P0105 code in my Mercedes-Benz?
- Yes, a qualified mechanic can diagnose and repair the issue causing the P0105 code in your Mercedes-Benz, ensuring proper resolution and optimal engine performance.
10. How can I prevent the P0105 code from occurring in my Mercedes-Benz in the future?
- Regular maintenance, such as checking for vacuum leaks, ensuring proper sensor function, and addressing any engine performance issues promptly, can help prevent the recurrence of the P0105 code.
Discuss the causes and fixes for P0105 Mercedes-Benz OBDII Code
-
I have a 2003 Mercedes Benz ML 500 W163 5.0 L made in USA. It has
155k miles on it. The check engine light came on after the mechanic changes the
valve cover gasket. I do not understand the generic error code. P0105We just put in new spark plugs and changes the oil. This car has
been Good to me. I change the oil sensor in the oil pan last year. I am not
sure what is causing this light to come on. P0105 The car still drives and
accelerates fine. Can any one help? Has anyone had this error code? Do I need
to take it to the dealer. They charge $150 just to put car on computer. By the
war the mechanic left the spark plug wires loose and one came off. The wire was
cleaned and put back on.
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