Q: Will battery disconnect erase/delete obd2 data
I want to change my spark plugs (and save myself about $50 in labor), but don't want to lose any obd2 error codes my mechanic may need. I am planning on having my mechanic do a full inspection on the vehicle later this week. Will removing the negative terminal from the battery erase or delete the codes, and make it more difficult and costly for the diagnosis of any additional repairs currently needed on my vehicle? Thank you.
Recommended Services
| Check Engine Light is on Inspection | $94.99 - $114.99 | Get a Quote |
Disconnecting the battery will not clear any codes in memory of the computer for stored OBD2 codes. The only way to clear the codes is to use a scanner and use the code clear function.
The statements expressed above are only for informational purposes and should be independently verified. Please see our
terms of service
for more details
Get an instant quote for your car
Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing
What others are asking
Loose headlight clip
A loose clip can allow moisture inside the connection and cause a headlight bulb to stop working, such as what you are experiencing with your Mazda 3. It is also possible that the clip came loose on its own due...
Acceleration high-pitched whistling
This generation of Toyota Previas has a known issue with this that is typically related to something called a "flex pipe" which is a part of the exhaust system that sits in front of the catalytic converter. The fact that...
All of a sudden it dies while driving?
Hi, thanks for writing in. This could well be a failure of the fuel pump relay (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-fuel-pump-relay), or the crankshaft position sensor (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-crankshaft-position-sensor). Both electronic components which can start failing from heat/use, then cool off and work again. Over time,...
Car shuts off at idle
Hi, thanks for writing in. This is a sign of a failing idle air control valve (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-idle-control-valve). This is a unit that regulates the air flow into the engine as it is mixed with fuel prior to being injected into...
Drive belt keeps popping off
The first thing to check is whether all of the pulleys are in the same plane. Imagine a flat surface applied up against the pulley edges. Do all pulleys touch the flat surface? If a pulley, for instance, on the...
Turbo blow off valve
Hello. The "blow-off-valve" or BOV, is a pressure-release valve designed to prevent over-pressurization of the engine, not the turbocharger itself. While hearing some of the sounds a turbo-charged engine (https://www.yourmechanic.com/article/how-a-modern-engine-works) makes while running through the gears is a most pleasant...
Is it possible to straighten you frame out
When a frame or sub frame is damaged a professional body shop would need to check the frame on a frame machine to see if it can be repaired. If not then the frame would need to be replaced if...
Slave cylinder for clutch
The clutch slave cylinder is external outside the transmission. It can be replaced without removing the transmission.
Hi I have a 2007 nissan maxima 3.5l with a p0746 and a p0776 code saying the pressure control solenoid is stuck off, when I press
Hi Jeffery. We answered this question earlier, but in case you didn't get it, here is what we had to say. The P-0746 OBD-II trouble code is one of the more confusing and hard to diagnose codes. P0746 will occur...
Related articles
How a Car Ignition System Works
The The complicated process of a vehicle's ignition system requires precise timing on the part of the various systems involved. Starting a vehicle involves much more than just turning a key in the ignition switch; it requires each system to...
How Often Should Spark Plugs Be Replaced?
While your engine runs on gasoline, it also requires electricity. It’s needed to operate most of your accessories, but is also required to...
Symptoms of a Bad or Failing Battery Cable
If you experience problems starting and powering the car or find corrosion on the battery terminals, you may need to replace a battery cable.
Browse other content
Maintenance
Cities