check engine lights wont clear, shifting problems

Description of Problem: Hello my problem is the check engine light codes they wont reset when I hit delete codes, what could be the problem there? When I put my car in R or D there is a strong jolt and when driving you don't really feel it but as soon as you slow down there's another jolt when it shifts in to 1st gear, and when under hard acceleration the car doesn't downshift for stronger acceleration like its supposed to it just keeps shifting up. Any answer would be great thank you. I already spent a lot of money on this car and still cant fix the problem

My car has 100227 m

Experienced mechanics share their insights in answering this question :
Knowing which codes were popping up would help in actually determining what the problem is. There are hundreds of possible codes and without knowing which ones will not clear, makes it near impossible to determine the problem. The codes keep coming back because you have a ’hard’ fault or one that is tested and remains present every time the key is turned on. Most likely it is an electrical issue.

The Honda transmissions have many problems from that era and I have changed dozens of them. But they also have I think 5 electrical solenoids and a few sensors mounted on the outside of the transmission which can cause your problem. You may have a speed sensor, pressure sensor, or solenoid acting up.

Best advice I have right know is to record the codes and get back to us. If you would like to have the transmission issue professionally diagnosed, you could consider using a qualified technician provided by YourMechanic.

How to Identify and Fix Common car Problems ?

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

You may need to have a mechanic check the oxygen sensor, the mass airflow sensor, or both. The oxygen sensor will likely need to be replaced if it is dirty, while the mass airflow sensor can simply be cleaned. A dirty sensor may prompt the “Check Engine” light to come on in the car.
This happens because of clogged injectors, dirty fuel filters, or a defective fuel pump. The fuel delivery system comprises many parts that deliver fuel to the engine. If one of these parts is not functioning correctly, it can trigger the check engine light to flash. The engine chomps more fuel whenever you accelerate.
If the check engine light in your Honda Accord starts blinking, that means that the problem needs immediate attention and your Honda should be brought in promptly. This blinking light usually indicates a severe engine misfire allowing unburned fuel to be dumped into the exhaust system.
Faulty Throttle Position Sensor:

This sensor monitors the throttle valve opening angle and engine`s speed. If this sensor malfunctions, the accelerator is not able to control the engine`s speed. The engine speed increases or decreases on its own.

Why does my car not accelerate when I push the gas? A car not accelerating properly can be caused by a number of things. It could be due to the throttle body, gas tank, spark plugs, or the ECU. It could also be because you have a dirty air filter or a clogged fuel filter.
All the electrical circuits in your car have fuses to protect them from a short circuit or overload. These fuses are located in two fuse boxes. The underhood fuse box is located in the engine compartment next to the battery.
A check-engine light will shut itself off if the condition that caused it is remedied. So, if your converter is marginal, and you did a lot of stop-and-go driving, which creates high demand for the converter, that might have turned on the check-engine light.
In most cases, successfully repairing the issue that caused your light to come on will cause the check engine light to turn off automatically—but only after 10 to 20 “cycles”. A cycle, in this instance, refers to the process of turning the vehicle on, running it for some time, and turning it off again.
Check your gas cap first. Many vehicles have a loose gas cap indicator that will be triggered before your check engine light comes on. If your gas cap is loose or the seal is not tight, the vapor leakage can cause your fuel system to trigger the check engine light.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

check engine lights wont clear, shifting problems
ANSWER : Knowing which codes were popping up would help in actually determining what the problem is. There are hundreds of possible codes and without knowing which ones will not clear, makes it near impossible to determine the problem. The codes keep coming back because you have a ’hard’ fault or one that is tested and remains present every time the key is turned on. Most likely it is an electrical issue.

The Honda transmissions have many problems from that era and I have changed dozens of them. But they also have I think 5 electrical solenoids and a few sensors mounted on the outside of the transmission which can cause your problem. You may have a speed sensor, pressure sensor, or solenoid acting up.

Best advice I have right know is to record the codes and get back to us. If you would like to have the transmission issue professionally diagnosed, you could consider using a qualified technician provided by YourMechanic.

2006 Ford Mustang has check engine light on
ANSWER : There are countless potential causes for your illuminated check engine light. The mechanic manually turned off the light, but it came back on because the problem has not been fixed. The first place to start is retrieval of the stored diagnostic trouble codes (DTCs). These codes serve as a starting point for any further diagnostics a mechanic may perform. Codes will be stored anytime the check engine light is on. Since the first mechanic was unable to fix your concern, I recommend giving the professionals at YourMechanic a call. We offer expert check engine light diagnosis and repair.

While driving on freeway truck goes into a limp mode, and the check engine light, abs light, parking break light, service brake
ANSWER : It is possible that you could be having an issue with your powertrain control module. This is somewhat of a common problem on many GM vehicles. I would recommend having your vehicle inspected by the dealership to determine if the powertrain control module is functioning properly. If not, a reflash of the powertrain control module may resolve the issue but often times it must be replaced.

Car won’t start, check engine light is out but other lights are on, got new control and immobilizer but the problem remains.
ANSWER : Hi, thanks for writing in. It is possible that your check engine light bulb could be out. I would recommend having a qualified professional remove your instrument cluster to determine if the bulb for the check engine light has failed. If the bulb has failed, I would recommend having it replaced and see if your results change. If the bulb is not faulty, it is possible that something was installed incorrectly during the most recent repair. I would recommend retracing your steps to determine if any steps were skipped over or done improperly. This will help to determine the cause of why the check engine light will not work. If you would like help, consider having an expert automotive technician from YourMechanic come to your home or office to inspect your electrical system for you, and make or suggest any repairs as needed.

Check engine light refuses to go off after engine replaced
ANSWER : Hello there, you have a long series of issues going on with your 2013 Hyundai Sonata. If you keep getting a repeating oil light on than there is likely a fault in that system.

Since this fault has lasted after the engine was replaced it could be a oil pressure sensor, wiring harness fault, ECU fault, oil pump, oil strainer clogged, or low oil pressure.

To diagnose this issue properly you need a complete vehicle inspection to start from square one and identify the root cause of all this.

Car started to slow down and then the check engine light, battery, and engine oil light came on. What could cause this?
ANSWER : Hi there. It is possible that the battery cable came loose or the wires to the oil pressure sensor has came loose or failed. Check the battery cables and make sure that the terminals are tight and clean. Check the wires to the oil pressure sensor and make sure that they are connected and not broken. If everything looks good, then the oil pressure sensor may have failed. Plus, check the computer for codes and see what is stored. This will lead you to the part that could have failed. I recommend replacing the oil pressure sensor then checking to see if the lights will go out. If you need further assistance troubleshooting your vehicle, then seek out a technician, such as one from Your Mechanic, that can assist you with the warning lights that came on.

Engine Light and AT light. Car goes into limp mode
ANSWER : Hello. Most of the time this is the result of a transmission failure. It is common for this transmission to have internal pressure problem which will cause these codes. It can also be a voltage problem so I always check that first. I check the voltage going to the transmission and if it is too low I repair that issue which is commonly the ignition switch. If the voltage is fine, then the transmission pressures need to be checked and it will more than likely need to be replaced. I would have a transmission specialist look into this.

Check Engine Light comes on after starting pickup
ANSWER : Hello there, thank you for asking about your 1992 Isuzu Pickup. A professional will have the correct equipment to read OBD1 codes. Retrieving the diagnostic trouble code(s) is the first place to start when diagnosing your vehicle. Increasing RPMs changes engine load, which can in turn affect many different sensors and components, causing the Check Engine Light to illuminate. The only way to narrow down the options and find the culprit is through in person diagnosis with an OEM compatible scan tool. A certified technician from YourMechanic can retrieve the OBD codes at your home or office.