AutoCodes – Generic – B1310

B1310 Code - Run/Start Control Circuit Short to Ground or Open

Quick Answer

When the ignition switch is turned to the RUN position, a voltage signal is sent to the Body Control Module (BCM). 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: B1310 indicates Run/Start Control Circuit Short to Ground or 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.

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Code Popularity 25,413

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 Nov 29, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1310 Description

When the ignition switch is turned to the RUN position, a voltage signal is sent to the Body Control Module (BCM). The BCM then activates the run/start relay and the run/acc relay, which distribute fused voltage to various components. The run/acc relay is serviced as part of the BCM. the BCM continuously monitors the control side of the run/start relay. This Diagnostic Trouble Code (DTC) sets if the BCM detects an open or a short to ground on the control circuit. The BCM uses a Field-Effect Transistor (FET) to control the run/start relay. When this DTC sets, the control side of the run/start relay is disabled via the FET. Once the condition that caused the DTC to set is repaired, the BCM must pass a self-test in order for the DTC to clear and the system to resume normal operation.

OBDII Code B1310 - Run/Start Control Circuit Short to Ground or Open - AutoCodes.com — B1310 Code - Run/Start Control Circuit Short to Ground or Open

What does this mean?

What are the Possible Causes of the DTC B1310?

Faulty Ignition Switch
Ignition Switch harness is open or shorted
Ignition Switch circuit poor electrical connection
Faulty Run/Start Relay
Faulty Body Control Module (BCM

How to Fix the DTC B1310?

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 B1310 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 B1310 code?

Need more information on how to fix the B1310 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1310 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1310 Buick — Ambient Air Temperature Sensor
B1310 Cadillac — Ambient Air Temperature Sensor
B1310 Chevrolet — Ambient Air Temperature Sensor
B1310 Ford — Run/Start Control Circuit Short to Ground or Open
B1310 GMC — Ambient Air Temperature Sensor
B1310 Lincoln — Run/Start Control Circuit Short to Ground or Open
B1310 Mercury — Run/Start Control Circuit Short to Ground or Open
B1310 Pontiac — Ambient Air Temperature Sensor
B1310 Saturn — Ambient Air Temperature Sensor

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 B1310 Code

1. What are the common symptoms of OBDII code B1310 (Run/Start Control Circuit Short to Ground or Open)?

- Common symptoms include difficulty starting the vehicle, engine stalling, or the engine not starting at all.

2. What can cause the OBDII code B1310 to trigger?

- The code B1310 can be triggered by a short to ground or an open circuit in the run/start control circuit, which may be caused by damaged wiring, faulty ignition switch, or a problem with the starter relay.

3. How serious is the OBDII code B1310 (Run/Start Control Circuit Short to Ground or Open)?

- The code B1310 can cause significant inconvenience as it can prevent the vehicle from starting or cause it to stall unexpectedly. It is recommended to address this issue promptly.

4. What should I do if my vehicle shows the OBDII code B1310?

- If your vehicle displays the code B1310, it is advisable to have it diagnosed by a qualified mechanic to determine the exact cause of the issue and proceed with the necessary repairs.

5. Can I continue driving with the OBDII code B1310 present?

- It is not recommended to continue driving with the code B1310 present, as it can lead to potential starting or stalling issues that may leave you stranded on the road.

6. How can the OBDII code B1310 be repaired?

- Repairing the code B1310 typically involves locating the source of the short to ground or open circuit in the run/start control circuit and addressing the underlying cause, which may require repairing or replacing damaged wiring, ignition switch, or starter relay.

7. Is it possible to reset the OBDII code B1310 without repairing the issue?

- While clearing the code may temporarily turn off the check engine light, it will not fix the underlying problem causing the code. It is essential to address the root cause to prevent further issues.

8. Can a DIY enthusiast fix the OBDII code B1310 at home?

- The complexity of the repair for the code B1310 may require advanced electrical diagnostic skills and tools. It is recommended to consult a professional mechanic for proper diagnosis and repair.

9. How much does it typically cost to repair the OBDII code B1310?

- The cost of repairing the code B1310 can vary depending on the cause of the issue, the extent of the damage, and the labor rates in your area. It is best to obtain estimates from local repair shops.

10. Will the OBDII code B1310 affect my vehicle's performance?

- Yes, the code B1310 can impact your vehicle's performance by causing starting issues or unexpected engine stalling, which can affect drivability and safety. It is important to address this code promptly.