Q: I have a p3449 code which reads mds solenoid 7. Can I just replace the solenoid? Also, tank will not shut pump off after fillup

asked by on January 01, 2017

Says it's the solenoid that that changes from 8 cylinder to 4

My car has 166000 miles.
My car has an automatic transmission.

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

What warning messages can be displayed on the instrument panel?
The Driver Information Center, or DIC, is a small screen at the bottom of the tachometer that can display a variety of information to the driver. Some of the information can be selected by the driver and is used to...
What is the weight capacity for my vehicle?
It’s very important to never exceed the weight capacity for your vehicle. Otherwise, your car may not operate correctly and could be an extreme safety hazard. The vehicle weight capacity can be located on the Tire and Loading Information Label....
Car squeals
Hi. The automatic tensioner in your vehicle is a one piece design. It comes mounted onto a bracket, if it is replaced completely. It is possible to only replace the pulley and bearing, but if the issue is with the...
Car cranking, but not starting
Hi there! There are a few possible causes for your concern. Your engine needs several things in order to run properly: Fuel from the fuel tank, spark from the ignition system to ignite the fuel, and pressure in the cylinders...
Check Engine light on
The powertrain control module (PCM) takes inputs from dozens of sensors. It then uses this information to control outputs such as fuel delivery and emissions equipment. If the PCM detects a problem anywhere in the system it will illuminate the...
Car won't start, battery drain - 1979 Mercedes-Benz 450SL
Hello. The Chilton manual will be able to give you accurate information as to the location of the voltage regulator (https://www.yourmechanic.com/services/instrument-voltage-regulator-replacement). This manual can tell you whether your voltage regulator is an internal or external part. It is not recommended...
2007 S80 V8 "charging system failure" - new ACM and rebuilt (by xemodex) ECM and LIN bus waveform on Blu/Brn wire scopes fine
Hi and thanks for contacting YourMechanic. To test the alternator correctly you will need to full field the alternator (https://www.yourmechanic.com/services/alternator-replacement). Get a Vat 40 or a Ferret 40 and hook it up to the battery and put the inductive pick...
2007 Cadillac DTS - got new battery during summer. now battery won't stay charged. horn won't work. radio won't work at all.
Hello, thank you for writing in. The vehicle may be having a variety of issues. The best thing we can do without having the vehicle in front of us is give an educated guess. The symptoms you are describing do...
Clicking Sound
What you are describing sounds like a faulty starter solenoid (https://www.yourmechanic.com/services/starter-replacement). A faulty starter solenoid will generally produce a clicking sound when turning the key. The starter solenoid is located on the starter and has internal electrical contacts that transmit...

Related articles

Chrysler Certified Pre-Owned (CPO) Car Program
If If you are shopping for a used Chrysler vehicle, you may want to check out cars under their certified pre-owned program. Many manufacturers have a certified pre-owned (CPO) program, and each one is set up differently. Read on to...
How to Replace an Evaporation Vent Solenoid
Emissions are regulated in part by the EVAP vent solenoid which goes bad when your car fails emissions testing or has extra pressure in the gas tank.
How to Replace a Canister Purge Solenoid
The canister purge solenoid prevents harmful vapor from releasing into the atmosphere. A faulty solenoid will not allow you to pass an emissions test.