Engine-Codes - Generic - B1242

B1242 Code - Wireless Door Lock Tuner Circuit Malfunction

- Code Popularity: 23,413 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents

|What are the Possible Causes of the Code B1242?

  • Faulty Door Control Receiver
  • Door Control Receiver harness is open or shorted
  • Door Control Receiver circuit poor electrical connection
  • Faulty Certification ECU (Smart Key ECU Assembly)

|How to Fix the B1242 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.

|What is the Cost to Diagnose the Code B1242?

Labor: 1.0

The cost to diagnose the B1242 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 B1242 Possible Symptoms?

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

|What Does the B1242 Code Mean?

The Door Control Receiver is used to receive radio waves related to the entry functions of the electrical key transmitter sub-assembly. The certification ECU (smart key ECU assembly) decodes the requested electrical key transmitter sub-assembly operation by identifying a key code based on the radio waves received via the door control receiver. The door control receiver receives a signal from the electrical key transmitter sub-assembly and sends signals to the main body ECU (multiplex network body ECU) through the certification ECU (smart key ECU assembly). (For example, if a door lock operation is requested, the certification ECU [smart key ECU assembly] sends a door lock command to the main body ECU [multiplex network body ECU]).

B1242 Code - Wireless Door Lock Tuner Circuit Malfunction

|Need more Information on the B1242 Code?

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|Code B1242 Information for Specific Makes

|Need Help with the B1242 Code?

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