AutoCodes – MINI – P1242 MINI

P1242 MINI Code - Secondary Upstream Manifold Air Pressure Sensor Too High in Deceleration

Quick Answer

P1242 MINI indicates Secondary Upstream Manifold Air Pressure Sensor Too High in Deceleration. Common causes for P1242 MINI include wiring or connector problems, a faulty related sensor or actuator, and control module or calibration issues. 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: P1242 MINI indicates Secondary Upstream Manifold Air Pressure Sensor Too High in Deceleration.
Common causes: Common causes for P1242 MINI include wiring or connector problems, a faulty related sensor or actuator, and control module or calibration issues.
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.

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Code Popularity 5,743

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 21, 2019

Description
How To Fix
Cost to Diagnose
FAQs
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Code P1242 MINI Description

OBDII Code P1242 MINI - Secondary Upstream Manifold Air Pressure Sensor Too High in Deceleration - AutoCodes.com — P1242 MINI Code - Secondary Upstream Manifold Air Pressure Sensor Too High in Deceleration

How to Fix the DTC P1242 MINI?

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 P1242 MINI 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 P1242 MINI code?

Need more information on how to fix the P1242 MINI code? Get Access to Factory Service Manuals

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Get the P1242 MINI 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 P1242 MINI Code

1. What are the common symptoms of OBDII code P1242 in a MINI?

- Common symptoms include rough idling, stalling, reduced engine power, and potentially poor fuel efficiency.

2. What could be causing the Secondary Upstream Manifold Air Pressure Sensor Too High in Deceleration code in a MINI?

- Possible causes may include a faulty secondary upstream manifold air pressure sensor, a vacuum leak, a damaged air intake system, or issues with the engine control module.

3. How can you diagnose OBDII code P1242 in a MINI?

- Diagnosis typically involves using a diagnostic scanner to read the code, checking the secondary upstream manifold air pressure sensor for proper function, inspecting for vacuum leaks, and testing the air intake system.

4. Can a DIY enthusiast repair OBDII code P1242 in a MINI?

- Depending on the cause, some DIY repairs may be possible, such as replacing the secondary upstream manifold air pressure sensor or fixing a vacuum leak. However, more complex issues may require professional assistance.

5. Are there any tips for repairing OBDII code P1242 in a MINI?

- It's important to thoroughly inspect all components related to the secondary upstream manifold air pressure sensor, ensure proper installation of any new parts, and clear the code after making repairs to see if the issue is resolved.

6. Is it safe to continue driving with OBDII code P1242 in a MINI?

- It's not recommended to drive with this code present, as it can lead to further engine damage or safety issues. It's best to address the underlying problem as soon as possible.

7. What is the function of the secondary upstream manifold air pressure sensor in a MINI?

- The sensor measures the air pressure in the intake manifold during deceleration, helping the engine control module adjust fuel delivery and optimize engine performance.

8. How much does it typically cost to repair OBDII code P1242 in a MINI?

- Repair costs can vary depending on the cause of the code and whether professional labor is needed. Parts and labor for sensor replacement or vacuum leak repair could range from $100 to $500 or more.

9. Can a dirty air filter cause OBDII code P1242 in a MINI?

- While a dirty air filter may affect engine performance, it is unlikely to directly trigger this specific code. It's still good practice to regularly replace the air filter as part of routine maintenance.

10. How long does it take to repair OBDII code P1242 in a MINI?

- The repair time can vary based on the cause of the code and the complexity of the issue. Simple fixes like sensor replacement may take an hour or two, while troubleshooting more involved problems could extend the repair time.