AutoCodes – BMW – P159D BMW

P159D BMW Code - Idle Air Control Actuator 2 Read Only Memory Error

Quick Answer

The Engine Control Module (ECM) monitors the Idle Air Control Actuator 2. Common causes include Faulty Idle Air Control Actuator 2, Idle Air Control Actuator 2 harness is open or shorted, Idle Air Control Actuator 2 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
P159D BMW indicates Idle Air Control Actuator 2 Read Only Memory Error.
Common causes
Common causes include Faulty Idle Air Control Actuator 2, Idle Air Control Actuator 2 harness is open or shorted, Idle Air Control Actuator 2 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 1,835
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Aug 16, 2022
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Code P159D BMW Description

The Engine Control Module (ECM) monitors the Idle Air Control Actuator 2. The ECM sets the OBDII code when the Idle Air Control Actuator 2 is not to factory specifications.
OBDII Code P159D BMW - Idle Air Control Actuator 2 Read Only Memory Error - AutoCodes.com
P159D BMW Code - Idle Air Control Actuator 2 Read Only Memory Error

What are the Possible Causes of the DTC P159D BMW?

  • Faulty Idle Air Control Actuator 2
  • Idle Air Control Actuator 2 harness is open or shorted
  • Idle Air Control Actuator 2 circuit poor electrical connection

How to Fix the DTC P159D BMW?

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 P159D BMW 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.

Need more information about the P159D BMW code?

Need more information on how to fix the P159D BMW code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P159D BMW code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P159D BMW Code

1. What are common symptoms of OBDII code P159D in BMW related to the Idle Air Control Actuator 2 Read Only Memory Error?

Common symptoms include rough idling, engine stalling, decreased fuel efficiency, and possible Check Engine Light illumination.

2. What causes the OBDII code P159D in BMW related to the Idle Air Control Actuator 2 Read Only Memory Error?

This code is usually triggered by a faulty idle air control actuator, issues with the actuator's read-only memory (ROM), or wiring/connectivity problems.

3. How can I diagnose the OBDII code P159D in my BMW?

Diagnosing this code typically involves using an OBDII scanner to read the code, checking the idle air control actuator for proper functioning, inspecting wiring and connections, and testing the ROM of the actuator.

4. Can I drive my BMW with the OBDII code P159D related to Idle Air Control Actuator 2 Read Only Memory Error?

It is not recommended to drive your BMW with this code active, as it can lead to performance issues and potential engine damage. It's best to address the issue promptly.

5. How can I repair the OBDII code P159D in my BMW?

Repair options may include replacing the idle air control actuator, reprogramming the actuator's ROM, repairing wiring/connectivity issues, or seeking professional assistance for a thorough diagnosis and repair.

6. Are there any DIY tips for fixing the OBDII code P159D related to the Idle Air Control Actuator 2 Read Only Memory Error?

While some basic checks like inspecting wiring and connections can be done DIY, it's recommended to consult a professional for proper diagnosis and repair of this code to ensure it is resolved correctly.

7. Is the OBDII code P159D in BMW related to Idle Air Control Actuator 2 Read Only Memory Error a common issue?

This specific code may not be as common as other OBDII codes, but it can occur in BMW vehicles with idle air control actuator problems or ROM issues.

8. Can resetting the ECU clear the OBDII code P159D in my BMW?

Resetting the ECU may temporarily clear the code, but if the underlying issue with the idle air control actuator or ROM persists, the code is likely to reappear.

9. How much does it typically cost to repair the OBDII code P159D in a BMW at a dealership or repair shop?

The cost of repairing this code can vary depending on the exact issue, parts needed, labor costs, and location. It's advisable to obtain quotes from different sources for an accurate estimate.

10. Is it safe to continue driving if the OBDII code P159D related to Idle Air Control Actuator 2 Read Only Memory Error intermittently appears and disappears?

While intermittent appearances of the code may not indicate a constant issue, it's still recommended to address the problem to prevent potential performance issues or further damage to your BMW's engine.

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