Engine-Codes - Generic - B0418

B0418 Code - Right Temperature Control Circuit

- Code Popularity: 9,684 Views
- Repair Importance Level: 1/3
- Repair Difficulty Level: 2/3
Table of contents

What are the Possible Causes of the Code B0418?

  • Faulty Passenger Air Temperature Actuator
  • Passenger Air Temperature Actuator harness is open or shorted
  • Passenger Air Temperature Actuator circuit poor electrical connection
  • Faulty Heating, Ventilation, and Air Conditioning (HVAC) Control Module

How to Fix the B0418 Code?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Code B0418 Tech Notes

B0418:01 Right Temperature Control Circuit Short to Battery
B0418:02 Right Temperature Control Circuit Short to Ground
B0418:04 Right Temperature Control Circuit Open

What is the Cost to Diagnose the Code B0418?

Labor: 1.0

The cost to diagnose the B0418 code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

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What are Code B0418 Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

What Does the B0418 Code Mean?

Stepper motors are used for temperature regulation, air distribution control and recirculation door control. With the switches and dials on the HVAC controls, air temperature door position, mode door position and recirculation door position can be selected. The selected values are passed to the Heating, Ventilation, and Air Conditioning (HVAC) Control Module via serial data. The HVAC control module supplies a 12 V reference voltage to the stepper motors and energizes the 4 stepper motor coils with a pulsed ground signal. The stepper motors move the appropriate doors into the calculated positions, in order to reach the desired positions.

B0418 Code - Right Temperature Control Circuit

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Code B0418 Information for Specific Makes

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