AutoCodes – Saab – P1682 Saab

P1682 Saab Code - Ignition 1 Switch Circuit 2

Quick Answer

There are 2 ignition 1 voltage circuits supplied to the Engine Control Module (ECM). Common causes include Blown Ignition Switch Fuse, Faulty Engine Control Module (ECM), Engine Control Module (ECM) harness is open or shorted. 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: P1682 Saab indicates Ignition 1 Switch Circuit 2.
Common causes: Common causes include Blown Ignition Switch Fuse, Faulty Engine Control Module (ECM), Engine Control Module (ECM) harness is open or shorted.
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 9,474

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 May 01, 2021

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1682 Saab Description

There are 2 ignition 1 voltage circuits supplied to the Engine Control Module (ECM). The first ignition 1 voltage circuit is provided by the powertrain relay, through the TAC fuse, located in the underhood fuse block. This ignition 1 voltage circuit supplies power to all the internal ECM circuits associated with the Throttle Actuator Control (TAC) operation, and to both TAC motor control circuits to the throttle body. The ignition switch provides the second ignition 1 voltage circuit to the ECM, through the ECM 1 fuse located in the underhood fuse block. This ignition 1 voltage provides power to all internal ECM circuits, except those associated with TAC operation. The ECM continuously monitors both ignition 1 voltage circuits. If the ECM detects a voltage level difference between the two circuits, Diagnostic Trouble Code (DTC) P1682 will set.

OBDII Code P1682 Saab - Ignition 1 Switch Circuit 2 - AutoCodes.com — P1682 Saab Code - Ignition 1 Switch Circuit 2

What does this mean?

What are the Possible Causes of the DTC P1682 Saab?

Blown Ignition Switch Fuse
Faulty Engine Control Module (ECM)
Engine Control Module (ECM) harness is open or shorted
Engine Control Module (ECM) circuit poor electrical connection

How to Fix the DTC P1682 Saab?

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 P1682 Saab 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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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 P1682 Saab Code

1. What are the common symptoms of OBDII code P1682 (Saab) Ignition 1 Switch Circuit 2?

- Common symptoms include engine stalling, difficulty starting the vehicle, and issues with the vehicle's electrical system.

2. What could cause the OBDII code P1682 (Saab) Ignition 1 Switch Circuit 2?

- The code can be triggered by a faulty ignition switch, wiring issues, a blown fuse, or a problem with the ignition key.

3. How can I diagnose the OBDII code P1682 (Saab) Ignition 1 Switch Circuit 2?

- Diagnosis involves checking the ignition switch, inspecting the wiring for any damage or loose connections, and testing the related fuses.

4. Can a DIYer repair the OBDII code P1682 (Saab) Ignition 1 Switch Circuit 2?

- While some simple fixes like inspecting and cleaning connections can be done by a DIYer, a professional should address more complex issues like replacing the ignition switch.

5. Is it safe to continue driving with the OBDII code P1682 (Saab) Ignition 1 Switch Circuit 2?

- It is not recommended to drive with this code present, as it can lead to potential safety hazards like unexpected stalling or loss of power while driving.

6. How much does it typically cost to repair the OBDII code P1682 (Saab) Ignition 1 Switch Circuit 2?

- The cost of repairs can vary depending on the root cause of the issue, but it can range from a simple fuse replacement to a more involved ignition switch replacement, costing a few hundred dollars.

7. Can a weak car battery cause the OBDII code P1682 (Saab) Ignition 1 Switch Circuit 2?

- Yes, a weak car battery can sometimes trigger this code due to insufficient power reaching the ignition system, so it's worth checking the battery's condition during diagnosis.

8. Will resetting the OBDII code P1682 (Saab) Ignition 1 Switch Circuit 2 make it go away permanently?

- Resetting the code may temporarily clear it, but if the underlying issue is not addressed, the code is likely to come back once the problem resurfaces.

9. Are there any preventive measures to avoid the OBDII code P1682 (Saab) Ignition 1 Switch Circuit 2 in the future?

- Regular maintenance, such as checking and replacing worn ignition components, can help prevent issues that may lead to this code in the future.

10. Can a faulty ignition 1 switch circuit 2 impact other vehicle systems?

- Yes, a faulty ignition switch can potentially affect other vehicle systems dependent on it, such as the fuel pump, starter motor, and various electrical components, leading to broader vehicle performance issues.