Safety Warning
- Do not drive aggressively or at highway speeds - transmission may fail without warning
- Avoid towing or carrying heavy loads until diagnosis is complete
- If transmission starts slipping, jerking, or making unusual noises, stop driving immediately
Quick Diagnosis Summary
The P0700 diagnostic trouble code in your 2020 Nissan Murano indicates a transmission control system malfunction that requires immediate attention. This generic OBD-II code signals that your vehicle's Powertrain Control Module (PCM) has detected an issue with the transmission control system and has likely stored additional transmission-specific codes for further diagnosis.
For 2020 Nissan Murano owners, the P0700 code is particularly concerning due to the vehicle's Continuously Variable Transmission (CVT), which has a documented history of premature failures. Understanding this code's implications can help you make informed decisions about repairs and prevent costly breakdowns.
Symptoms of P0700 Code in 2020 Nissan Murano
When your Murano triggers the P0700 code, you'll typically notice several warning signs that indicate transmission control problems:
- Check Engine Light: The most obvious symptom is an illuminated check engine light on your dashboard
- Transmission Warning Light: A specific transmission warning indicator may also appear
- Harsh or Delayed Shifting: The CVT may exhibit unusual shifting patterns, hesitation, or rough transitions
- Slipping Transmission: You might feel the engine rev without corresponding acceleration
- Reduced Power: The vehicle may enter "limp mode," limiting acceleration and top speed
- Unusual Noises: Whining, grinding, or buzzing sounds from the transmission area
- Poor Fuel Economy: Decreased gas mileage due to transmission inefficiency
- Jerky Acceleration: Inconsistent power delivery during acceleration
Common Causes of P0700 in 2020 Nissan Murano
CVT Transmission Internal Failure (High Probability)
The 2020 Nissan Murano uses a CVT transmission that has become notorious for premature failures. Internal components such as the steel belt, pulleys, or valve body can deteriorate earlier than expected, often between 60,000-100,000 miles. The CVT's complex hydraulic system and continuously moving parts create multiple failure points that can trigger the P0700 code.
Transmission Control Module (TCM) Failure (Medium Probability)
The Transmission Control Module serves as the brain of your CVT system. When the TCM fails internally or loses communication with other vehicle modules, it can generate the P0700 code even without mechanical transmission problems. TCM failures can occur due to electrical issues, software corruption, or component aging.
CVT Fluid Contamination or Low Level (Medium Probability)
CVT transmissions require specific fluid with precise properties to function correctly. Contaminated, burnt, or insufficient CVT fluid can cause control system malfunctions. Many Murano owners overlook regular CVT fluid maintenance, which should occur every 30,000-60,000 miles depending on driving conditions.
Wiring Harness or Connector Damage (Low Probability)
Damaged wiring between the TCM and transmission sensors or solenoids can interrupt communication and trigger the P0700 code. This type of damage might result from accidents, rodent interference, or general wear and tear.
Diagnosis Process for P0700 Code
Proper diagnosis of the P0700 code requires professional equipment and expertise:
Initial Code Reading
A qualified technician will use an OBD-II scanner to retrieve the P0700 code along with any additional transmission-specific codes that provide more detailed information about the malfunction.
CVT Fluid Inspection
The mechanic will check CVT fluid level, color, and consistency. Burnt or contaminated fluid indicates internal transmission damage, while low levels suggest leaks or inadequate maintenance.
Electronic System Testing
Advanced diagnostic tools will test the Transmission Control Module's functionality and communication with other vehicle systems. This helps determine if the issue is electronic or mechanical.
Road Test and Performance Evaluation
A professional road test under various driving conditions helps identify specific transmission behavior problems and confirms diagnostic findings.
Repair Options and Professional Service
Professional service is absolutely required for P0700 code repairs in your 2020 Nissan Murano. CVT transmissions are highly complex systems that require specialized knowledge and equipment.
Transmission Control Module Replacement
If the TCM has failed, replacement typically costs $800-$1,500 including programming and labor.
CVT Fluid Service
A complete CVT fluid change costs $300-$500 and may resolve issues caused by contaminated fluid.
CVT Transmission Rebuild or Replacement
Internal CVT failure requires either rebuilding the existing transmission ($3,500-$4,500) or complete replacement with a remanufactured unit ($4,000-$6,500).
Cost Breakdown for P0700 Repairs
Repair costs for P0700 issues in your 2020 Nissan Murano vary significantly based on the root cause:
- Diagnostic Fee: $150-$200
- CVT Fluid Service: $300-$500
- TCM Replacement: $800-$1,500
- Wiring Repair: $200-$600
- CVT Rebuild: $3,500-$4,500
- CVT Replacement: $4,000-$6,500
Total estimated range: $3,500-$6,500 for major transmission repairs.
Prevention Tips for CVT Longevity
While some CVT failures are unavoidable due to design issues, you can maximize your transmission's lifespan:
- Regular CVT Fluid Changes: Follow Nissan's maintenance schedule religiously
- Gentle Acceleration: Avoid aggressive driving that stresses the CVT system
- Proper Warm-up: Allow the transmission to warm up in cold weather
- Avoid Overloading: Don't exceed your vehicle's towing or weight capacity
- Address Issues Early: Don't ignore transmission warning signs
- Regular Inspections: Have your CVT inspected during routine maintenance
Safety Warnings and Driving Restrictions
Important safety considerations when experiencing P0700 code:
- Do not drive aggressively or at highway speeds - the transmission may fail without warning
- Avoid towing or carrying heavy loads until diagnosis is complete
- If the transmission starts slipping, jerking, or making unusual noises, stop driving immediately
- Have the vehicle towed to a qualified repair facility rather than driving it
Frequently Asked Questions
You should limit driving and seek professional diagnosis immediately. While the vehicle may still operate, continued driving could cause complete transmission failure. Avoid highway speeds, aggressive acceleration, and heavy loads until the issue is resolved.
The 2020 Nissan Murano's CVT transmission is covered under the standard 5-year/60,000-mile powertrain warranty. If your vehicle is still within warranty coverage, Nissan should cover diagnostic and repair costs. Contact your dealer to verify warranty status.
Diagnostic testing typically takes 2-4 hours. Simple repairs like fluid changes can be completed in a day, while TCM replacement may take 1-2 days. Complete CVT rebuilds or replacements usually require 3-5 business days due to parts availability and labor intensity.
While there's no official recall for 2020 Murano CVT transmissions, Nissan has extended warranties on CVT transmissions in some model years due to widespread issues. Check with your dealer or the NHTSA website for current warranty extensions or service bulletins.
While you can clear the code with an OBD-II scanner, this doesn't fix the underlying problem. The P0700 code will return quickly if the transmission control issue persists. Professional diagnosis is necessary to identify and resolve the root cause.
Rebuilding involves disassembling your existing transmission and replacing worn internal components, typically costing $3,500-$4,500. Replacement involves installing a remanufactured transmission unit, costing $4,000-$6,500 but often including better warranties and reliability.