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B1342 Mercury Code - ECU Is Defective

- Code Popularity: 8,961 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC B1342 Mercury?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • The B1342 code means that the Electronic Control Unit (ECU) has failed, usually the code is combine with other issues or codes. Repair other problems before replacing the ECU
⚠ Does your Mercury have Safety Recalls? → Check here

How to Fix the DTC B1342 Mercury?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Search for B1342 Mercury Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1342 Mercury code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

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

Code B1342 Mercury Description

When a repetitive fault causing a circuit overload is detected on certain output circuits, the Smart Junction Box (SJB) disables the circuit by removing voltage, or ground, to the affected circuit. The circuit remains disabled until the fault is corrected and an on-demand self-test is run. When the on-demand self-test has been run after all faults have been corrected, any Diagnostic Trouble Code (DTC) related to the fault are cleared.

OBDII Code B1342 Mercury - ECU Is Defective - AutoCodes.com
B1342 Mercury Code - ECU Is Defective

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Code B1342 Mercury comments

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