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Engine-Codes – Nissan – P0850 2008 Nissan Altima Sedan

P0850 2008 Nissan Altima Sedan Code - Park/Neutral Switch

Quick Answer

The P0850 code in a 2008 Nissan Altima Sedan refers to an issue with the Park/Neutral Switch. Common causes include Faulty Park/Neutral Switch, Damaged or misaligned switch, Wiring issues (short or open circuit). 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
P0850 2008 Nissan Altima Sedan indicates Park/Neutral Switch.
Common causes
Common causes include Faulty Park/Neutral Switch, Damaged or misaligned switch, Wiring issues (short or open circuit).
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 17, 2024
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Code P0850 2008 Nissan Altima Sedan Description

The P0850 code in a 2008 Nissan Altima Sedan refers to an issue with the Park/Neutral Switch. This switch, also known as the transmission range sensor, is responsible for detecting the position of the gear shift lever. When the vehicle is in Park or Neutral, the switch sends a signal to the engine control module (ECM) to allow the engine to start. If the switch malfunctions or fails, it can lead to starting issues, as the ECM may not receive the correct signal to start the engine.

OBDII Code P0850 2008 Nissan Altima Sedan - Park/Neutral Switch
P0850 2008 Nissan Altima Sedan Code - Park/Neutral Switch

Common Causes of P0850 2008 Nissan Altima Sedan

  1. Faulty Park/Neutral Switch
  2. Damaged or misaligned switch
  3. Wiring issues (short or open circuit)
  4. Corrosion or debris around the switch

Symptoms of P0850 2008 Nissan Altima Sedan

  1. Difficulty starting the engine
  2. Inability to shift out of Park
  3. Engine stalling when shifting into gear
  4. Vehicle not recognizing when it is in Park or Neutral

How to Fix P0850 2008 Nissan Altima Sedan

  1. Begin by locating the Park/Neutral Switch, typically located on the transmission housing or the gear shift linkage.
  2. Inspect the switch for any visible damage, misalignment, or corrosion. Replace the switch if necessary.
  3. Check the wiring connected to the switch for any signs of damage or poor connections. Repair or replace any damaged wiring.
  4. Clear the diagnostic trouble codes from the ECM using an OBD-II scanner.
  5. Test the vehicle to ensure that the issue has been resolved and that the engine starts and shifts properly.

Cost to Fix P0850 2008 Nissan Altima Sedan

The typical repair costs for addressing a P0850 code in a 2008 Nissan Altima Sedan can range from $150 to $300. This estimate includes the cost of a new Park/Neutral Switch, any necessary wiring repairs, and labor charges. However, it is important to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Most auto repair shops charge between $80 and $150 per hour for labor, but rates may be higher in metropolitan areas or at dealerships, while independent shops may offer lower rates. It is recommended to check local rates for a more accurate estimate.

What does this mean?

Tech Notes for P0850 2008 Nissan Altima Sedan

For the CVT transmission the Park/Neutral Switch is located inside the shifter assembly, for the manual transmission it is located on the transmission (see picture)

When is the Code Detected?

The signal of the park/neutral position (PNP) switch is not changed in the process of engine starting and driving.

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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 P0850 2008 Nissan Altima Sedan Code

1. What does OBDII code P0850 on a 2008 Nissan Altima Sedan indicate?

The OBDII code P0850 on a 2008 Nissan Altima Sedan refers to an issue with the Park/Neutral Switch.

2. What are the common symptoms of a Park/Neutral Switch problem in a 2008 Nissan Altima Sedan?

Common symptoms of a Park/Neutral Switch issue may include difficulty starting the vehicle, the engine not cranking, or the vehicle not shifting out of Park.

3. What are the possible causes of OBDII code P0850 on a 2008 Nissan Altima Sedan?

Possible causes of OBDII code P0850 on a 2008 Nissan Altima Sedan include a faulty Park/Neutral Switch, damaged wiring, or a poor electrical connection.

4. How can I diagnose a Park/Neutral Switch problem in my 2008 Nissan Altima Sedan?

Diagnosing a Park/Neutral Switch issue may involve checking the switch for continuity, inspecting the wiring for damage, and scanning the vehicle's computer for trouble codes.

5. Can I drive my 2008 Nissan Altima Sedan with OBDII code P0850?

It is not recommended to drive your 2008 Nissan Altima Sedan with OBDII code P0850, as it may lead to starting or shifting issues that can affect the vehicle's safety and performance.

6. How can I repair a Park/Neutral Switch problem in my 2008 Nissan Altima Sedan?

Repairing a Park/Neutral Switch issue may involve replacing the faulty switch, repairing damaged wiring, or addressing any electrical connection issues.

7. Do I need specialized tools to fix OBDII code P0850 on my 2008 Nissan Altima Sedan?

While basic tools may be sufficient for some repairs, diagnosing and fixing a Park/Neutral Switch problem may require specialized tools like a multimeter or OBDII scanner.

8. Are there any DIY tips for troubleshooting OBDII code P0850 on a 2008 Nissan Altima Sedan?

DIY troubleshooting tips may include checking the fuse related to the Park/Neutral Switch, inspecting the switch for physical damage, and ensuring proper electrical connections.

9. How much does it cost to repair OBDII code P0850 on a 2008 Nissan Altima Sedan?

The cost of repairing OBDII code P0850 on a 2008 Nissan Altima Sedan can vary depending on the specific issue, parts needed, and labor rates at a repair shop.

10. Can a Park/Neutral Switch issue affect the performance of my 2008 Nissan Altima Sedan?

Yes, a Park/Neutral Switch problem can impact the starting, shifting, and overall performance of your 2008 Nissan Altima Sedan, making it important to address the issue promptly.

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