B1358 Mercury Code - Ignition Run Circuit Short To Ground
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
- B1358 Mercury indicates Ignition Run 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.
Code B1358 Mercury Description
What are the Possible Causes of the DTC B1358 Mercury?
- 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 B1358 Mercury?
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 B1358 Mercury 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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Frequently Asked Questions about B1358 Mercury Code
1. What does the OBDII code B1358 mean for a Mercury vehicle?
The code B1358 indicates that the ignition run circuit has a short to ground, which is a wiring issue affecting the ignition system.
2. What are the common symptoms of the B1358 code in a Mercury?
Symptoms may include the engine not starting, stalling, malfunctioning electrical components, or a blown fuse.
3. What causes the B1358 Ignition Run Circuit Short to Ground code?
Common causes include damaged or exposed wiring, a faulty ignition switch, a shorted relay, or corroded connectors in the ignition circuit.
4. Can I drive my Mercury with the B1358 code active?
It’s not recommended, as the vehicle may stall unexpectedly or fail to start, potentially leaving you stranded.
5. How is the B1358 code diagnosed?
A technician will inspect the ignition circuit wiring, check for shorts to ground, test the ignition switch, and verify proper operation of related relays and fuses.
6. What tools are needed to fix the B1358 code on a Mercury?
Tools may include a multimeter, wiring diagrams, and basic hand tools for inspecting and repairing the ignition circuit.
7. How do I fix the B1358 code on my Mercury?
Repairs may involve replacing damaged wiring, repairing corroded connectors, or replacing a faulty ignition switch or relay.
8. How much does it cost to fix the B1358 code?
The cost depends on the exact issue, but repairs typically range from $50 to $300, including diagnostics and parts.
9. Can a blown fuse cause the B1358 code?
Yes, a blown fuse in the ignition circuit can trigger this code, but the underlying cause (such as a short to ground) must also be addressed.
10. Does clearing the B1358 code fix the problem?
No, clearing the code will only temporarily remove it. The root cause of the ignition circuit short must be repaired to resolve the issue.
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