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 didn't get a message it was expecting from another part of the car in time. It's like waiting for a text message from a friend that never arrives.
The Engine Control Module (ECM) is not receiving a proper signal from the Electronic Throttle Control (ETC) system over the Controller Area Network (CAN) bus within the expected time frame.
The P320D code indicates a communication issue between the ECM and the ETC system via the CAN bus. The ECM monitors the messages sent between various control modules. If the expected message from the ETC is not received within a specified time window, the ECM triggers this fault code.
• Check Engine Light illuminated
• Reduced engine performance
• Poor throttle response
• Faulty Electronic Throttle Control (ETC) module
• Wiring issues in the CAN bus network
• Faulty ECM
CAN: Controller Area Network, a vehicle bus standard designed to allow microcontrollers and devices to communicate with each other.
ETC: Electronic Throttle Control, a system that electronically connects the accelerator pedal to the throttle.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connections in the CAN bus network.
• Test the ETC module for proper operation.
• Repair or replace damaged wiring or connectors in the CAN bus.
• Replace the ETC module if faulty.
• Update or reprogram the ECM if necessary.
• OBD-II scanner
• Multimeter
• Wiring diagram
$150 - $500
Moderate
• Dodge Ram
• Jeep Grand Cherokee
• Chrysler 300
• Regular maintenance checks of the vehicle's electrical systems.
• Ensure all software updates are installed.
• Avoid aftermarket modifications that could affect the CAN bus.
Communication Error
• Do not ignore the Check Engine Light.
• Consult a professional mechanic for diagnosis and repair.
Repairs may be covered under the vehicle's powertrain warranty if applicable.
This code has been reported in vehicles with complex electronic systems, especially those with drive-by-wire technology.
Moderate – While the vehicle may still be drivable, it could lead to performance issues and should be addressed promptly.
Driving with a malfunctioning ETC system can lead to unsafe driving conditions.
• Vehicle in idle
• Engine at operating temperature
The ETC module is typically located on or near the throttle body in the engine bay.
Q: Can I drive my car with a P320D code?
A: It's possible to drive the car, but it may not perform well. It's best to get it checked soon.
Q: Will the P320D code clear itself?
A: The code may clear if the issue is resolved, but it's recommended to use an OBD-II scanner to clear it.
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