AutoCodes – Nissan – P1820 Nissan

P1820 Nissan Code - Engine Speed Signal

Quick Answer

The Engine Control Module (ECM) transmits the engine speed signal via CAN communication to the transfer control unit. Common causes include Faulty Engine Control Module (ECM), Faulty Transfer Control Unit, Engine Control Module (ECM) harness is open or shorted. 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: P1820 Nissan indicates Engine Speed Signal.
Common causes: Common causes include Faulty Engine Control Module (ECM), Faulty Transfer Control Unit, Engine Control Module (ECM) harness is open or shorted.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 30,562

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 Sep 21, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1820 Nissan Description

The Engine Control Module (ECM) transmits the engine speed signal via CAN communication to the transfer control unit. DTC P1820 will set when either of the following occur:
- Malfunction is detected in engine speed signal that is output from the ECM.
- Improper signal is input while driving.

OBDII Code P1820 Nissan - Engine Speed Signal - AutoCodes.com — P1820 Nissan Code - Engine Speed Signal

What does this mean?

What are the Possible Causes of the DTC P1820 Nissan?

Faulty Engine Control Module (ECM)
Faulty Transfer Control Unit
Engine Control Module (ECM) harness is open or shorted
Engine Control Module (ECM) circuit poor electrical connection

How to Fix the DTC P1820 Nissan?

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 P1820 Nissan 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 P1820 Nissan code?

Need more information on how to fix the P1820 Nissan code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1820 Nissan 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 P1820 Nissan Code

1. What are the common symptoms associated with OBDII code P1820 in a Nissan related to the Engine Speed Signal?

- Common symptoms include rough idling, stalling, poor acceleration, and in some cases, the vehicle may not start at all.

2. What are the possible causes of OBDII code P1820 in a Nissan?

- The code P1820 in a Nissan related to the Engine Speed Signal can be caused by issues with the crankshaft position sensor, wiring problems, or a faulty Engine Control Module (ECM).

3. How can I diagnose the OBDII code P1820 in my Nissan?

- Diagnosis typically involves using a diagnostic scanner to read the code, checking the wiring and connections related to the engine speed signal, and testing the crankshaft position sensor for proper functioning.

4. Can a faulty engine speed sensor trigger code P1820 in a Nissan?

- Yes, a faulty engine speed sensor, also known as the crankshaft position sensor, can trigger code P1820 in a Nissan as it affects the ECM's ability to accurately monitor engine speed.

5. What are some repair tips for fixing OBDII code P1820 in a Nissan?

- Repair tips include checking and repairing any damaged wiring, replacing the crankshaft position sensor if faulty, and ensuring proper connections to the ECM.

6. Is it safe to continue driving with OBDII code P1820 in my Nissan?

- It is not recommended to continue driving with OBDII code P1820 in your Nissan, as it can lead to further damage to the engine or other components if left unresolved.

7. How much does it typically cost to repair OBDII code P1820 in a Nissan?

- The cost of repairing OBDII code P1820 in a Nissan can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor.

8. Can OBDII code P1820 be reset without fixing the underlying issue in a Nissan?

- While the code can be cleared using a diagnostic scanner, it will likely reappear if the underlying issue causing the code is not addressed.

9. Will disconnecting the battery reset OBDII code P1820 in a Nissan?

- Disconnecting the battery may temporarily clear the code, but it is not a recommended method to reset the code as it does not fix the underlying issue causing the fault.

10. How long does it take to repair OBDII code P1820 in a Nissan?

- The repair time for OBDII code P1820 in a Nissan can vary depending on the exact cause of the issue and the expertise of the technician, but it typically takes a few hours to complete the repair.