AutoCodes – Generic – B1848

B1848 Code - Ignition Tamper Circuit Short To Ground

Quick Answer

The Body Control Module (BCM) monitors the Ignition Switch. Common causes include Faulty Ignition Switch, Ignition Switch harness is open or shorted, Ignition Switch circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: B1848 indicates Ignition Tamper Circuit Short To Ground.
Common causes: Common causes include Faulty Ignition Switch, Ignition Switch harness is open or shorted, Ignition Switch circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 4,525

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 02, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1848 Description

The Body Control Module (BCM) monitors the Ignition Switch. The BCM sets the OBDII code when the Ignition Switch is not to factory specifications.

OBDII Code B1848 - Ignition Tamper Circuit Short To Ground - AutoCodes.com — B1848 Code - Ignition Tamper Circuit Short To Ground

What does this mean?

What are the Possible Causes of the DTC B1848?

Faulty Ignition Switch
Ignition Switch harness is open or shorted
Ignition Switch circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B1848?

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

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1848 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B1848 code?

Need more information on how to fix the B1848 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1848 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1848 Lexus — Short To Positive In Curtain Shield Squib Left 2nd Step Circuit
B1848 Scion — Short To Positive In Curtain Shield Squib Left 2nd Step Circuit
B1848 Toyota — Short To Positive In Curtain Shield Squib Left 2nd Step Circuit

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B1848 Code

1. What are common symptoms of OBDII code B1848 (Ignition Tamper Circuit Short To Ground)?

- Common symptoms include engine misfire, rough idle, difficulty starting the vehicle, and the illuminated Check Engine Light.

2. What can cause the ignition tamper circuit to short to ground?

- The ignition tamper circuit can short to ground due to damaged wiring, a faulty ignition switch, or a malfunctioning tamper detection module.

3. How can I diagnose OBDII code B1848?

- Diagnosis involves using a scan tool to retrieve the trouble code, inspecting the wiring for damage, testing the ignition switch, and checking the tamper detection module for faults.

4. What are the possible effects of ignoring OBDII code B1848?

- Ignoring code B1848 can lead to further electrical system issues, potential immobilization of the vehicle, and safety concerns related to the proper functioning of the ignition system.

5. Can I still drive my vehicle with OBDII code B1848 present?

- It is not recommended to drive the vehicle with code B1848 present, as it can lead to more severe problems and potential safety hazards.

6. How can I repair OBDII code B1848 (Ignition Tamper Circuit Short To Ground)?

- Repairing code B1848 involves identifying and fixing the short to ground in the ignition tamper circuit, repairing or replacing damaged wiring, and addressing any faulty components.

7. Are there any DIY repair tips for fixing OBDII code B1848?

- DIY repair tips include carefully inspecting the wiring for damage, ensuring proper grounding of the ignition system components, and following a systematic approach to troubleshooting.

8. How much does it typically cost to repair OBDII code B1848?

- The cost of repairing code B1848 can vary depending on the extent of the damage, the parts needed for replacement, and whether professional labor is required. It is recommended to consult a mechanic for an accurate estimate.

9. Can a faulty battery or alternator cause OBDII code B1848 to appear?

- While a faulty battery or alternator can cause electrical issues, they are unlikely to directly trigger code B1848. However, it is still important to ensure the overall health of the vehicle's electrical system.

10. How can I prevent OBDII code B1848 from recurring in the future?

- To prevent code B1848 from recurring, regularly inspect the vehicle's wiring for damage, promptly address any electrical issues, and follow proper maintenance practices to ensure the system's integrity.