Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer is having trouble talking to one of its parts. It's like when your phone can't connect to Wi-Fi.
The car's control modules communicate with each other to ensure everything works properly. This code indicates a communication problem between the master and slave modules.
P3336 is triggered when there is a failure in the communication link between the master control module and one or more slave modules. This can be due to wiring issues, a faulty module, or software errors.
• Check Engine Light is on
• Erratic vehicle behavior
• Loss of certain vehicle functions
• Faulty communication wiring
• Defective control module
• Software glitch in the control module
Control Module: A computer that controls one or more of the vehicle's systems.
Master/Slave: A communication setup where one device controls one or more other devices.
• Check for other related codes
• Inspect wiring and connectors between modules
• Test the control modules for proper operation
• Repair or replace damaged wiring
• Reprogram or replace faulty control module
• Update software if necessary
• OBD-II scanner
• Multimeter
• Diagnostic software
$200 - $800
Moderate
• Vehicle 1
• Vehicle 2
• Vehicle 3
• Regular maintenance checks
• Ensure software updates are performed
• Inspect wiring for damage regularly
Communication Error
• Avoid driving long distances until fixed
• Consult a professional mechanic
• Keep a record of any recurring issues
Check with your vehicle manufacturer for warranty coverage related to control module issues.
This code has been observed in vehicles with complex electronic systems, especially in models with multiple control modules.
Moderate – It should be addressed soon to prevent further issues.
Ignoring this issue might lead to safety risks due to malfunctioning vehicle systems.
• Vehicle must be turned on
• Modules should be in communication mode
Control modules are typically located under the dashboard or in the engine compartment.
Q: Can I drive with a P3336 code?
A: It's not recommended as it may affect vehicle performance and safety.
Q: How do I clear a P3336 code?
A: Fix the underlying issue, then use an OBD-II scanner to clear the code.
High-End · Full-system diagnostics
A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.
Network faults often require full-system access instead of a generic code reader alone.
View on Amazon
Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
View on Amazon
Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.