Skip to content
motorbeast logo
  • Autos
  • Audio
  • Bikes
  • Batteries
  • Detailing
  • Oils
  • Parts
  • Questions
  • Roof Boxes
  • Scanners

P1682 code – Causes, information & Fix

Written BySteve Riley Updated on28/07/2022

 A P1682 error code indicates a problem in the difference between the ignition switch circuit 1…

why-does-the-check-engine-light-stay-on-after-fixing-problem

 A P1682 error code indicates a problem in the difference between the ignition switch circuit 1 and 2. It can be caused by a lot of factors but can also be easily fixed. In this article, we are going to look at the causes of this error code as well as how to diagnose and fix it.

Table of Contents
  • What are the signs of a P1682 error code?
    • Dimming headlights:
    • Weak or dead battery
    • Strange noises:
    • Stalling engine:
    • Electric failures:
    • Blown fuse box:
    • Frequent blowing of fuses:
    • Loose Fuses:
    • Burnt out fuses and terminals:
  • How to test an ignition switch
  • How to fix P1682 error code
  • Conclusion
why-does-the-check-engine-light-stay-on-after-fixing-problem

A P1682 error code usually means that the ignition switch or either of its circuits, or both, are damaged. The ignition switch is responsible for providing electric current to the starter so that the engine can start. This can be caused by a number of things, including a bad ignition switch, a wiring problem, or a problem with the ECM.

If you see this code, it is important to take your car to a mechanic and have it inspected. There may be something wrong with your ignition switch, and it is important to get it fixed as soon as possible.

The ignition switch is sometimes part of an anti-lock theft system. Testing an ignition switch comes when you have replaced a bad ignition switch with a new one. Doing this requires that your ignition key is programmed since the antitheft system has been restructured.

Sale
MOTOPOWER MP69033 Car OBD2 Scanner Code Reader Engine Fault Code...
MOTOPOWER MP69033 Car OBD2 Scanner Code Reader Engine Fault Code...
  • Multi-Functions - Practical Multi-Functions OBD2 code reader...
  • Wide Capability - Supports 9 protocols compatible with most...
  • LCD Display - Designed with a clear display LCD screen (128...
  • Compact Design - Car diagnostic scanner is equipped with a...
  • ABS / Airbag codes NOT Supported - It is able to read and...
$25.00
Buy on Amazon Price incl. tax, excl. shipping

Last update on 2023-03-13 / Affiliate links / Images from Amazon Product Advertising API

What are the signs of a P1682 error code?

When the battery warning lights come on, this is usually your first sign that there may be something wrong with the ignition switch. However, this sign is not accurate as the warning light is very general and may be indicating a problem with the battery itself. There are a number of symptoms that indicate a problem with the ignition switch and they include:

Dimming headlights:

One of the most common symptoms of a bad ignition switch is dimming headlights. Sometimes if the ignition switch has serious problem, the dash board and warning lights may also be affected becoming dim as well. If you notice that the headlights grown dimmer as you accelerate and brighter when you’re slowing down, it is likely that the ignition switch has a problem. The lights may flicker instead of dimming, but both of these indicate a bad or blown indicator.

Weak or dead battery

A weak battery usually indicates a bad ignition switch. Since the ignition switch is supposed to replenish the battery, it would mean that if the battery is weak or dead, the ignition switch is bad too. Once the ignition switch goes bad, the vehicle’s electric components will draw power directly from the battery draining it faster and causing it to die quickly.

Strange noises:

The ignition switch has a lot of moving parts that work together in harmony when it is working correctly. If any of these parts break or dislocate or wear, you may hear strange sounds coming from the hood of your car. One of the noises you might hear is a grinding noise.

The grinding noise is usually caused by worn out bearings. You may also hear a whining noise. This would be a problem with the voltage regulator which is part of the ignition switch. Any of these noises should be checked immediately to prevent further damage.

Stalling engine:

The engine may stall or crank up when starting or even when driving. This is an indicator of a bad ignition switch. If the car engine fails to start or has difficulty starting, it could be because of a dying battery. Sure the problem might be independently the battery but once you’ve eliminated this possibility, then the ignition switch is the problem.

Electric failures:

We’ve already seen that the ignition switch is responsible for the powering of all the car’s electric components. It you notice that these components are failing or acting up all around the same time, this is no coincidence – it is very likely that the ignition switch has gone bad.

Blown fuse box:

Alternators have fuses that prevent electric surges from damaging the components. However, these fuses can sometimes blow due to strong surges or old age. Once they blow, the alternator cannot charge the battery. Since not all vehicles have a fuse box, you should investigate to see whether your car has one for proper diagnosis. There are symptoms that indicate a bad fuse box, they include:

Frequent blowing of fuses:

If fuses have been often blowing, this might indicate a problem with the fuse box entirely. It might mean there is a short in the fuse ox causing the fuses inside it to blow. The fuse box should be removed, disassembled and examined to find the root cause of the problem.

Loose Fuses:

If fuses fall off easily or hang loosely, this might indicate the terminals of the fuse panel are damaged. This problem will cause electrical problems in the vehicle such as intermittent power loss to accessory and warning lights.

Burnt out fuses and terminals:

This is more serious problem compared to the previous two. If the terminals or fuses are overheated for any reason they may overheat and burn up. The terminals or the plastic that makes them may burn and melt. This will require a full panel replacement and sometimes rewiring of the panels.

These are the most common symptoms of a bad or blown ignition switch. It is recommended that you fix ignition switch issues either by replacing or repairing to prevent further and serious damage.

How to test an ignition switch

The ignition switch is responsible for providing electric current to the starter so that the engine can start. The following steps show how to test your new ignition switch. For this procedure, ensure you have a voltmeter.

  1. Open the starter panel under the steering wheel and pull out the starter fuse
  2. Check the fuse for damage such as burns and if any, replace the fuse with a new one
  3. Open the hood and use the voltmeter by connecting the red terminal of the voltmeter to the positive terminal of the battery. The black end should be touched anywhere on the frame of the car. The voltmeter should read 12.6V. Anything less than 12V means the battery is dead
  4. Crank up the engine and if it cranks up, the ignition switch is fine. Otherwise, the switch is either faulty of not properly connected. If you hear a click sound, then the switch is not the problem.

How to fix P1682 error code

Depending on what the cause of the noise is, ticking noise have different fixes and prevention measures. They include:

  1. Check oil levels regularly, like once a month, using a dipstick to ensure you have enough. Check oil pressure with special gauges designed for this purpose. Recommended pressure is between 15 and 20 PSI. Also remember that oil should be checked when the engine is warm at idle.
  2. To fix valves that are worn out or out of adjustment, you need to replace the old shims with new ones and adjusting the rocker arms. If you have a pushrod engine, ensure the lifters are clean as oil deposits tend to accumulate on them over time causing the ticking noise. The silver lining to this problem is that it is the easiest and cheapest to fix.
  3. A rod knock problem can be fixed using the following steps:
  • Drain out all the oil
  • Replace the oil filter with a new one. Install and close tightly using wrench
  • Clean the fuel injector to prevent debris from getting into the engine.
  • Put in new fresh oil, about five quarts. Check the rod bearings while at it and ensure they are shut tightly
  1. Replace any worn out or damaged spark plugs
  2. For fan problems, Check for any loose bolts or shredded radiator. Tighten anything loose and replace the damaged radiator to fix this issue
  3. Replace any worn out engine components such as pistons and shafts with new ones

Conclusion

The ignition switch is rarely damaged. However when it does happen, it is recommended that you fix it immediately by replacing with a new one. Remember to also get the lock system reprogrammed to accommodate the new ignition switch.

Post Views: 18
Post Tags: #OBD Scanners

Related Posts

  • Fluke 175 vs. 177 – Which One is Best?
  • Foxwell NT301 vs NT510 – Which is the better multi-system scanner with battery registration?
  • Audi vs BMW vs Mercedes Benz Reliability
  • The Best OBD 2 Scanners for Honda
  • Foxwell NT624 vs. NT510 – Choosing an adequate vehicle scanning solution

The Best Foxwell Scanners

The No 1 Rated Foxwell Scanner

Foxwell NT301

FOXWELL NT301 OBD2 Scanner Professional Mechanic OBDII Diagnostic Code Reader Tool for Check Engine Light
Check Me Out On Amazon

Prices pulled from the Amazon Product Advertising API on:

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.


Foxwell NT604

FOXWELL Car Scanner NT604 Elite OBD2 Scanner ABS SRS Transmission, Check Engine Code Reader,Diagnostic Scan Tool with SRS Airbag Scanner,Car Diagnostic Scanner for Cars
Check Me Out On Amazon

Prices pulled from the Amazon Product Advertising API on:

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.


Foxwell NT201

FOXWELL NT201 OBD2 Scanner Check Engine Light Car Code Reader OBD II Diagnostic Scan Tool
Check Me Out On Amazon

Prices pulled from the Amazon Product Advertising API on:

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.


Best Rated Autel Scanners


Autel MK808 OBDii Scanner

Autel Scanner MK808 Diagnostic Scan Tool 2021 Newest with All System Diagnosis, 25+ Maintenance Functions Services Including IMMO, Oil Reset, EPB, BMS, SAS, DPF, ABS Bleed
Take a Peak

Prices pulled from the Amazon Product Advertising API on:

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.


Autel MS309 OBDii Scanner

Autel MS309 Universal OBD2 Scanner Check Engine Fault Code Reader, Read Codes Clear Codes, View Freeze Frame Data, I/M Readiness Smog Check CAN Diagnostic Scan Tool
Take a Peak

Prices pulled from the Amazon Product Advertising API on:

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.


Autel AL519 OBD2 Scanner

Autel AutoLink AL519 OBD2 Scanner Enhanced Mode 6 Car Diagnostic Tool Check Engine Code Reader CAN Scan Tool, Upgraded Ver. of AL319
Take a Peak

Prices pulled from the Amazon Product Advertising API on:

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.


OBD Scanners For VW, Audi Skoda, Seat


Autophix 7610

AUTOPHIX 7610 Elite Full Systems Diagnostic Scan Tool for VW Audi Skoda Seat Automotive Full Functions OBD2 Scanner Code Reader Battery Registration Tool for All VAG After 1996 [2022 Version]
Take a Peak

Prices pulled from the Amazon Product Advertising API on:

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.


Ancel VD500

ANCEL VD500 OBD II Diagnostic Scanner for Volkswagen VW Audi Skoda Seat Diagnosis Check Engine Light EPB ABS SRS Code Reader Oil Throttle Position Adaption Brake Pad Reset Tool
Take a Peak

Prices pulled from the Amazon Product Advertising API on:

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.


Foxwell NT614

FOXWELL NT614 Elite OBD2 Scanner-ABS/SRS/Transmission/Check Engine Code Reader Scan Tool with EPB/Oil Light Reset, Airbag Car Diagnostic Scanner
Take a Peak

Prices pulled from the Amazon Product Advertising API on:

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.



Top Rate Ancel Scanners

Ancel AD310

ANCEL AD310 Classic Enhanced Universal OBD II Scanner Car Engine Fault Code Reader CAN Diagnostic Scan Tool-Black
Check Me Out On Amazon

Prices pulled from the Amazon Product Advertising API on:

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.


BlueDriver OBDII Scanner For iPhone & Android

Top Rated Scanner

BlueDriver Bluetooth Pro OBDII Scan Tool for iPhone & Android
Check Me Out On Amazon

Prices pulled from the Amazon Product Advertising API on:

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.


Affiliate Disclosure

We are an affiliate. We hope you like our recommendations! Just so you know, we may collect a share of sales or other compensation from the links on this website. Thank you for using our links, it helps to grow our website.

  • Privacy Policy
  • Affiliate Disclosure
  • Contact Us
  • About Us
  • Cookie Policy
  • Privacy Statement

© 2023 MotorBeast Motorbeast.Org

Manage your privacy

To provide the best experiences, we and our partners use technologies like cookies to store and/or access device information. Consenting to these technologies will allow us and our partners to process personal data such as browsing behavior or unique IDs on this site. Not consenting or withdrawing consent, may adversely affect certain features and functions.

Click below to consent to the above or make granular choices. Your choices will be applied to this site only. You can change your settings at any time, including withdrawing your consent, by using the toggles on the Cookie Policy, or by clicking on the manage consent button at the bottom of the screen.

Functional Always active
The technical storage or access is strictly necessary for the legitimate purpose of enabling the use of a specific service explicitly requested by the subscriber or user, or for the sole purpose of carrying out the transmission of a communication over an electronic communications network.
Preferences
The technical storage or access is necessary for the legitimate purpose of storing preferences that are not requested by the subscriber or user.
Statistics
The technical storage or access that is used exclusively for statistical purposes. The technical storage or access that is used exclusively for anonymous statistical purposes. Without a subpoena, voluntary compliance on the part of your Internet Service Provider, or additional records from a third party, information stored or retrieved for this purpose alone cannot usually be used to identify you.
Marketing
The technical storage or access is required to create user profiles to send advertising, or to track the user on a website or across several websites for similar marketing purposes.
Statistics

Marketing

Features
Always active

Always active
Manage options Manage services Manage vendors Read more about these purposes
Manage options
{title} {title} {title}
Manage your privacy
To provide the best experiences, we use technologies like cookies to store and/or access device information. Consenting to these technologies will allow us to process data such as browsing behavior or unique IDs on this site. Not consenting or withdrawing consent, may adversely affect certain features and functions.
Functional Always active
The technical storage or access is strictly necessary for the legitimate purpose of enabling the use of a specific service explicitly requested by the subscriber or user, or for the sole purpose of carrying out the transmission of a communication over an electronic communications network.
Preferences
The technical storage or access is necessary for the legitimate purpose of storing preferences that are not requested by the subscriber or user.
Statistics
The technical storage or access that is used exclusively for statistical purposes. The technical storage or access that is used exclusively for anonymous statistical purposes. Without a subpoena, voluntary compliance on the part of your Internet Service Provider, or additional records from a third party, information stored or retrieved for this purpose alone cannot usually be used to identify you.
Marketing
The technical storage or access is required to create user profiles to send advertising, or to track the user on a website or across several websites for similar marketing purposes.
Manage options Manage services Manage vendors Read more about these purposes
Manage options
{title} {title} {title}
Scroll to top
  • Autos
  • Audio
  • Bikes
  • Batteries
  • Detailing
  • Oils
  • Parts
  • Questions
  • Roof Boxes
  • Scanners
Search