P1605 Infiniti Code - Automatic Transmission Communication
Quick Answer
The P1605 code in an Infiniti indicates a communication error between the automatic transmission control module and the engine control module. Common causes include Faulty wiring: Damaged or corroded wiring connections between the automatic transmission control module and the engine control module can disrupt communication, Malfunctioning sensors: Faulty sensors that provide crucial data to the control modules can cause communication errors, Defective control modules: A malfunctioning automatic transmission control module or engine control module can hinder communication between the two systems. 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
- P1605 Infiniti indicates Automatic Transmission Communication.
- Common causes
- Common causes include Faulty wiring: Damaged or corroded wiring connections between the automatic transmission control module and the engine control module can disrupt communication, Malfunctioning sensors: Faulty sensors that provide crucial data to the control modules can cause communication errors, Defective control modules: A malfunctioning automatic transmission control module or engine control module can hinder communication between the two systems.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P1605 Infiniti Description
The P1605 code in an Infiniti indicates a communication error between the automatic transmission control module and the engine control module. This means that the two modules are not able to exchange data properly, which can lead to issues with the vehicle's transmission system. The automatic transmission control module is responsible for controlling the shifting of gears in the transmission, while the engine control module manages the engine's performance. When these two modules are not communicating effectively, it can result in erratic shifting, poor performance, and potentially even transmission failure.
Common Causes of P1605 Infiniti
- Faulty wiring: Damaged or corroded wiring connections between the automatic transmission control module and the engine control module can disrupt communication.
- Malfunctioning sensors: Faulty sensors that provide crucial data to the control modules can cause communication errors.
- Defective control modules: A malfunctioning automatic transmission control module or engine control module can hinder communication between the two systems.
- Software issues: Software glitches or updates that are not compatible with the control modules can lead to communication errors.
- Electrical interference: External factors such as electromagnetic interference can disrupt the communication signals between the modules.
Symptoms of P1605 Infiniti
- Erratic shifting: The vehicle may experience sudden or delayed shifts between gears, leading to a jerky or rough driving experience.
- Slipping transmission: The transmission may slip out of gear or struggle to maintain the correct gear, causing a loss of power and acceleration.
- Check engine light: The check engine light may illuminate on the dashboard, indicating a problem with the transmission system.
- Reduced fuel efficiency: The vehicle may consume more fuel than usual due to inefficient transmission operation.
- Transmission overheating: In severe cases, the transmission may overheat due to improper shifting patterns, leading to potential damage.
How to Fix P1605 Infiniti
- Diagnose the issue: Use a diagnostic scanner to retrieve the specific error codes and pinpoint the underlying cause of the communication error.
- Inspect wiring and connections: Check the wiring harness and connections between the automatic transmission control module and the engine control module for any damage or corrosion. Repair or replace any faulty components.
- Test sensors: Check the sensors related to the transmission system for proper operation. Replace any sensors that are malfunctioning.
- Reset control modules: Reset the automatic transmission control module and engine control module to clear any stored error codes and reset the communication protocols.
- Update software: Ensure that the control modules are running the latest software version and update if necessary to address any compatibility issues.
Cost to Fix P1605 Infiniti
The typical repair costs for addressing a P1605 code in an Infiniti can range from $200 to $600, including parts and labor. However, the 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 commonly charge between $80 and $150 per hour; however, rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It's advisable to check local rates for a more precise estimate.
Tech Notes for P1605 Infiniti
2001 Infiniti I30 Factory Service Bulletin OBDII Code P1605
Need more information about the P1605 Infiniti code?
Need more information on how to fix the P1605 Infiniti code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1605 Infiniti code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P1605 Infiniti Code
No Frequently Asked Questions about P1605 Infiniti Code found.
Discuss the causes and fixes for P1605 Infiniti OBDII Code
Code P1605 Infiniti comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.