All engine sensor failure, transmission problems after a car wash.

15+ error codes when ran OBD, 30-45 mph rumble strip sound , torque converter issues, all failed after a car wash.

My car has 93000 miles.
My car has an automatic transmission.

Experienced mechanics share their insights in answering this question :
Hi there. The only thing that could cause the severe issues that you are having with your vehicle is a leak in the exhaust system and having cold water enter the catalytic converter causing the chamber to collapse. Check the computer for the codes and see what may have failed in the process of the vehicle issue. I recommend seeking out a professional, such as one from Your Mechanic, to help you diagnose your exhaust system issues.

How to Identify and Fix Common car Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced mechanics :

Also known as `limp home mode`, limp mode is a security feature in cars which activates when the engine or transmission control unit picks up a fault. Once it detects a problem, limp mode will cause the less important parts of the car, such as air conditioning, to switch off, and the speed of the car will be reduced.
How to get your car out of limp mode. You may be able to reset the car by switching it off and on again after about 30 seconds. If the warning lights disappear and the car behaves normally, then it may have just been a temporary glitch.
Yes, a car wash can trigger a check engine light when the water gets into parts of the engine that shouldn`t get wet. This is especially true for electronic and electrical parts. When they get wet, they start failing, resulting in check engine light showing up.
Speed sensors, the MAF, MPS and TPS; to name just a few of the essential monitors within your engine. All of these send signals to the control units, so as with faulty wiring, if one of these monitoring units is not functioning correctly, then it could send a message that causes the car to enter limp mode.
The MAF sensor regulates the air-fuel mixture in the engine and might become dirty. The dirt on the sensor sends wrong values to the control unit, and the limp mode is activated.
Clear the check engine light

Use a reliable OBD2 scan tool to clear fault codes and reset limp mode. Just plug into your OBD2 port and search for the correct function.

What causes limp mode? From faulty engine sensors, components or wiring, transmission issues, brake and clutch problems to a blown head gasket, or even low fluid levels, there are many reasons why your vehicle will enter limp mode.
A dirty air filter can cause your vehicle to throw a Check Engine code. During this instance, the Check Engine Light of your vehicle will turn on. The light turns on because your vehicle is sensing that its engine isn`t receiving enough air.
Yes, transmission problems can cause your check engine light to come on. Your automobile`s main computer, the engine control module (ECM), talks with system sensors to make sure everything is okay. If the transmission sensors report a problem, the ECM will turn on the check engine light.
Generally this causes poor performance and limp mode, and customers often complain of a faulty MAP sensor despite the fact it just hasn`t been calibrated correctly, or at all.
In the case of the throttle body (and related sensor), delayed to false information can cause the computer to make faulty corrections to the air-fuel mixture. You might notice a switch into “limp-home” mode, where the power to the car`s engine noticeably reduced power is reduced no matter how hard you press the pedal.
Can an O2 Sensor even throw the car into limp? If it`s throwing the code for the o2 sensor it won`t go into limp mode, since the ecu recognizes a problem with the sensor it disregards that input.
You can bypass limp mode by restarting your car, checking the fluid levels, disconnecting the battery, or scanning it with an OBD scanner. When limp mode is active, you should avoid driving unless absolutely necessary. Avoid highway travel and take routes that are less traveled.
If the fuel pump isn`t working properly or there is a blockage in the fuel lines, the engine may not be getting enough fuel. This can cause it to run rough and eventually go into limp mode.
If it gets bad enough, a dusty air filter can cause damage to the engine, catalytic converter, DPF filters, oxygen sensors, and other vital components resulting in costly repairs. It`s also bad for the environment.
This discrepancy can be caused by various things, such as a malfunctioning catalytic converter, a clogged air filter, a vacuum leak, or an issue with the fuel system.
Also known as `limp home mode`, limp mode is a security feature, which is activated when either a vehicle`s engine control unit or transmission control unit detects a fault. It is designed to protect the engine and transmission from catastrophic damage or complete failure.
Signs of a failing torque converter

If it senses a problem, it will turn on the check engine light and log a trouble code or codes. Your car is shuddering: A faulty torque converter can cause a shudder just before or after it locks up at cruising speed. You might feel the car shudder while driving about 30 to 45 MPH.

Limp mode should reset after every cycle (engine restart), if it finds the same condition it will reset limp mode. It locks you into second gear. You can check trans fluid and the EATX fuse & relay to start with, typically you`d have to run the Chrysler DRB scan tool to find a cause.
Limp mode should reset after every cycle (engine restart), if it finds the same condition it will reset limp mode. It locks you into second gear. You can check trans fluid and the EATX fuse & relay to start with, typically you`d have to run the Chrysler DRB scan tool to find a cause.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

After using car wash, lights started flickering – 2001 BMW 325
ANSWER : You can hire a technician to look over the vehicle and remove the splash panels to see if water leaked through and came into contact with the vehicles electronic equipment just to be sure. Have the same technician inspect the bulbs, connectors and wiring to the headlights.

All engine sensor failure, transmission problems after a car wash.
ANSWER : Hi there. The only thing that could cause the severe issues that you are having with your vehicle is a leak in the exhaust system and having cold water enter the catalytic converter causing the chamber to collapse. Check the computer for the codes and see what may have failed in the process of the vehicle issue. I recommend seeking out a professional, such as one from Your Mechanic, to help you diagnose your exhaust system issues.

Stalling engine, brakes, power steering and transmission failure
ANSWER : The stalling may well be caused by a failure of the crankshaft position sensor. This device provides timing instructions for the ignition system. When it fails, the engine no longer gets spark at the spark plugs and stalls. When the car stalls out, the brakes and steering cutting off are typical symptoms that go along with the car shutting off. To have all of this scoped out, a certified professional from YourMechanic can inspect your car for a correct diagnosis of the stalling issue.

My Audi A4 has a bad transmission range sensor and when accelerating the car shakes, I don’t know if it’s the sensor?
ANSWER : A faulty transmission range selector switch/sensor could have some negative effects on vehicle performance and consequently the switch should be replaced prior to a diagnostic for the acceleration problem you are describing. After the sensor/switch is replaced, if the acceleration problem remains, that problem would be identified and resolved during a slow acceleration diagnostic. To obtain replacement of the range selector component, please use YourMechanic’s transmission range selector service page and the responding certified mechanic will get this taken care of for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

2013 Ford Focus Transmission Issue. Is it worth keeping the car?
ANSWER : Hi There,
This is a known issue in this generation Ford Focus and some Fiestas with the "Power Shift" transmission and there have been numerous recalls and lawsuits. Although, it is would be difficult to determine how much longer your transmission will last given the fact that you have many new parts, I would not recommend junking the car as it may still provide some valuable life left for you. I would recommend taking it to the dealer to see if these parts may be covered under the recall.

Map sensor car won’t start up good ?
ANSWER : Your MAP sensor is an important input for your computer. It helps determine the load on the engine to calculate the correct amount of fuel to inject. It sometimes takes a few seconds for the vehicle to realize that the sensor is not producing a good signal.

At that point, it will use other methods to determine the fuel rate, such as pre-programmed fuel maps, throttle position, etc. I would suggest replacing the MAP sensor and retesting. If you would like to have it checked first, a certified technician from YourMechanic will be able to scan your vehicle and test components to determine the root cause of your starting issue before making a repair.

My car is having all sorts of problems. My check engine light is on. We tuned it up, changed both O2 sensors, checked fuses, and n
ANSWER : Quite often, when one mechanical problem occurs, others are quick to follow. In most cases, they are not related to the same components being faulty. It is possible that during service of replacing or cleaning other parts, a battery cable was not removed, which might have broken a few fuses. The first step that I’d complete is to check all the fuses to see if you’ve got a blown or damaged one. Second, if the fuses are good, check electrical relays. Once that’s done, have a professional mechanic complete a check engine light inspection.

The engine of the car runs, but when I push the gas pedal it does not accelerate, and the engine does not rev.
ANSWER : Hello. It sounds like you may have an issue with your throttle position sensor. This sensor sends a reference voltage to your power-train control module, which uses that to determine ignition timing and fuel trims. If the power-train control module is not detecting the proper signal from the throttle position sensor, the engine may not accelerate properly. It’s probably a good idea for you to have a professional mobile mechanic come to your location and complete a car is slow to accelerate inspection first, so they can pinpoint what is causing this issue to occur and they will recommend the right repairs be completed.