B1356 Code - Ignition Run Circuit Open
Quick Answer
The Ignition Switch RUN circuit provides greater than 10 volts through the circuits to the Smart Junction Box (SJB) when the key is in the RUN position. 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
- B1356 indicates Ignition Run Circuit Open.
- 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.
Code B1356 Description
What are the Possible Causes of the DTC B1356?
- Faulty Ignition Switch
- Ignition Switch harness is open or shorted
- Ignition Switch circuit poor electrical connection
- Faulty Smart Junction Box (SJB)
How to Fix the DTC B1356?
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 B1356 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.
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Information for Specific Makes
- B1356 Ford — Ignition Run Circuit Open
- B1356 Lincoln — Ignition Run Circuit Open
- B1356 Mercury — Ignition Run Circuit Open
Frequently Asked Questions about B1356 Code
1. What does the OBDII code B1356 mean?
The B1356 code indicates an "Ignition Run Circuit Open," meaning there is an issue with the circuit that powers the ignition system in the "run" position.
2. What are the common symptoms of code B1356?
Symptoms may include the engine not starting, stalling after starting, electrical components failing to operate, or the ignition switch feeling loose or unresponsive.
3. What causes the B1356 code to appear?
Possible causes include a faulty ignition switch, damaged wiring in the ignition circuit, a blown fuse, or a malfunctioning ignition relay.
4. Can a bad ignition switch trigger the B1356 code?
Yes, a worn or defective ignition switch is one of the most common causes of the B1356 code.
5. How can you diagnose code B1356?
Use a multimeter to check for continuity in the ignition circuit, inspect the ignition switch for damage or wear, and check fuses and relays for proper operation.
6. Is it safe to drive with a B1356 code?
Driving with this code is not recommended, as it can lead to unexpected stalling or a complete failure to start the vehicle.
7. How do you fix the B1356 code?
Repairs may include replacing the ignition switch, repairing damaged wiring, replacing blown fuses, or addressing a faulty ignition relay.
8. Can a dead battery cause the B1356 code?
While unlikely, a dead or weak battery can lead to voltage issues that may indirectly contribute to ignition circuit problems.
9. How much does it cost to fix the B1356 code?
Repair costs vary depending on the issue, ranging from $50 for a blown fuse to $300 or more for ignition switch replacement.
10. Can the B1356 code clear itself?
No, the code will not clear itself. The underlying issue must be repaired, and the code can then be cleared with an OBDII scanner.
Discuss the causes and fixes for B1356 OBDII Code
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