This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. The P code identifies a problem within an automatic transmission. The ratio of a combination of engine speed and throttle position and the speed of the transmission is used to determine what gear the transmission will use when driving.
If there is a problem with any gear within the transmission, then the P code will appear once this ratio is calculated from the sensor data in the transmission. Eventually, the P code will cause the Check Engine Light to illuminate on the dashboard. Along with this indicator, there may also be slipping within the transmission and poor overall transmission performance.
The transmission may stay in a low gear for too long, or stay in a high gear until the engine stalls. Fuel economy may worsen as well. Prior to further diagnostic tests, the fluid in the transmission should be checked for quality, and the level of fluid should be noted. Old or dirty fluid should be replaced. This will provide them with the necessary information from the engine that they can view in real-time. The code will be cleared and the mechanic will take the car for a test drive.
If the code comes back, then the code was caused by an actual problem in the transmission. Depending on the severity of the issue, the technician may perform a torque converter stall speed test to determine if the engine stall speed is within factory specifications.
The engine speed must match the readings from the transmission sensor. The biggest problem that pops up when diagnosing the P trouble code is that the symptoms may all be stemming from low or dirty transmission fluid.
Topping off or replacing this fluid may solve all of the issues in the transmission triggering the trouble code. The severity of P code depends mostly on the application. In some cases, minor issues can trigger the code, due to the fact that any abnormality in the transmission speed will trigger it in any gear.This means the automatic transmission is experiencing a problem, which is usually caused by dirty transmission fluid or problems with shift solenoids.
This code is a generic trouble code, meaning it applies to all vehicles equipped with the OBD-II system, especially those vehicles made since up to present. Modern vehicles that come equipped with automatic transmission or tranaxles use a torque converter between the engine and transmission to improve the torque output of the engine and drive the rear wheels.
Newer vehicle models are equipped with more than four gear ratios for fuel efficiency. The PCM decides when to shift up or down between gears, based on the vehicle speed vs. It does so by using the input coming from various sensors to verify the correct operation of the transmission and all its components.
Thus, Error Code P happens in automatic transmission when there is a problem on the shifting or driving to any gear. If there are other transmission code problems, they should be fixed first before fixing the incorrect fear ratio code.
As with other error codes P triggers the Check Engine light. Common symptoms of this error code may include the following:. Old and dirty fluid must be replaced.
To codes will then be cleared and the vehicle will be taken for a test drive. If the code comes back, then the problem is really caused by an actual failure in the transmission.
Depending on the severity of the problem, technicians may perform a torque converter stall speed test to determine whether the stall speed of the engine is within the factory specifications or not.
The engine must be able to match the readings from the transmission sensor. Low or dirty transmission problem is probably the most common cause of this error code. Thus, by simply replacing the dirty fluid, the issue can be resolved.
The fact that any abnormality in the transmission speed will trigger problems to the gear, the severity of the problem can vary. In severe cases, the problem could trigger major transmission issue, rendering the vehicle unable to change gear. However, it could also be accompanied by other specific trouble codes. Because of the complexity of the transmission problem, it is always best to have this code diagnosed and repaired by a qualified technician as soon as possible.
Remember me. Table of Contents. Subscribe to our mailing list.P is one of the most common transmission trouble codes. In effect, this allows an automatic transmission to function like a manual transmission at certain speeds and engine loads, and eliminates all slipping from the transmission. The symptoms of P vary greatly. If the converter stays unlocked, it can be a nuisance. There are many different things that can cause the P code.
Most of them are going to need an experts touch to diagnose. This list is presented with a combination of likely to cause the issue and repairability in mind first. There are many symptoms of low transmission fluid. The most noticeable one is going to be the transmission slipping. If the transmission fluid is dirty or burntit can make the transmission behave in a way that is not normal and throw the P code. If the fluid is low or bad, replacing should be considered an urgent priority.
The good news is that transmission fluid and filters are cheap. The wiring harness that goes to and from the transmission is one of the more vulnerable pieces of wiring on a vehicle. Inspecting the harness for obvious signs of distress, checking the connection at the transmission itself, and finally a continuity test can go a long way in diagnosing your Accord. It is highly likely that the torque converter clutch solenoid TCC has gone bad.
But, jumping straight to this conclusion without inspecting the transmission fluid and wiring can cause a lot of undue headache. The torque converter itself or torque converter clutch can go bad and throw the P code. If the TCC seems to be functioning properly, it may be that the problem is in the transmission case itself. It could be a valve body issue, a problem with the pressure going through the transmission, or a clogged filter.
Articles on this site are always written with the DIY enthusiast in mind. We would never want to discourage that. With that being said, P is a tougher code to diagnose and is often out of the range of the shade tree mechanic. This decreases fuel mileage. It feels exactly like when you need to downshift in a manual transmission.
This increases fuel mileage and makes the transmission operate at a higher temperature. Wiring Issues The wiring harness that goes to and from the transmission is one of the more vulnerable pieces of wiring on a vehicle. Torque Converter The torque converter itself or torque converter clutch can go bad and throw the P code. Problem in the Case If the TCC seems to be functioning properly, it may be that the problem is in the transmission case itself.
Conclusion Articles on this site are always written with the DIY enthusiast in mind. If there is anything that you would like to add, please feel free to leave a comment.The first signs of trouble was driving it on the highway for about 20 minutes and upon coming to a stop light and trying to accelerate the car wouldn't go.
Shifted to natural and back to D4 tires spun but finally the car took off It again seemed to knock out off gear. When I got home I put the car into reverse and parked and cut the car off. I just purchased the car on last Friday.
Not sure if it's worth stating but every light works except when it's in D4. My car has an automatic transmission. Hi Mercedes. The ratio of a combination of engine speed and throttle position and the speed of the transmission is used to determine what gear the transmission will use when driving. If there is a problem with any gear within the transmission, then the P code will appear once this ratio is calculated from the sensor data in the transmission. The repairs can be as easy as adding or flushing the transmission fluid and changing the filter - all the way to needing to replace the transmission.
Since replacing transmissions are very expensive, I would recommend having a professional mechanic come to your location to complete a transmission fluid flush. This may remove the obstruction in your transmission and resolve the problem. If this works - fantastic. If not, it is probably best to start looking for a replacement vehicle - as the cost of replacing the transmission is likely more than your 99 Accord is valued.
Q: P 99 Honda Accord asked by Mercedes. Tim Charlet Automotive Mechanic.
Thank Tim. Was this answer helpful? Thank you for your feedback! Sorry about that. Why wasn't this information helpful? Recommended Services. The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details. Related Questions. Engine by Miamiboii Hi there so my car would not start when i turn the key i get nothing no clicking or cranking even no lights on the dash but as soo by Certuhfy G. Engine shutting down.
Where is purge valve for evap canister 07 honda civic si by Mark. Home Questions. Year I don't know. What others are asking My car won't start after replacing flex pipe and Muffler Technically, there is no connection at all between what was done on the exhaust system and the subsequent no start problem.
Of course, it's always possible the Mechanic damaged something on the vehicle but such, if it occurred and if Read more. A clicking noise from the fuse box and my windows work at times and sometimes they don't I just recently bought the 99 Ford f The fuse box on this vehicle is know for having internal failures for some circuits for the relays circuit board.When the check engine light comes Honda Civic P code on the first you should check is the gas cap.
Pull over, retighten it, and take a look at the cap to see if it has any cracks in it. Continue driving and see if the check engine light turns off.
All you need to do is take the old one off and screw on the new one. If you've already made it to the store, you might as well just replace it. While not car-threatening, it's good to take care of this right away to improve gas mileage. So you should chech it on our car models. Disconnected, dirty or fouled spark plugs are common causes for engines that won't start. Spark plugs typically need to be replaced every season or 25 hours of use. You should also check that the spark plug gap is set properly.
If your spark plugs look good, problems with your ignition system can also preventing a spark.
P0730 OBD-II Trouble Code: Incorrect Gear Ratio
These can range from a faulty spark plug lead, shorted kill switch or flywheel key damage. Parts or components should not be replaced with reference to only a P DTC. The vehicle service manual should be consulted for more information on possible causes of the fault, along with required testing. Code Search Please fill the "Code Box" to find engine fault code. Ways to read engine trouble codes.
Ways to clear check engine light on car panel.
P0730 – Incorrect gear ratio
Check Engine Light Dictionary Ways to clear check engine light on car panel. Main engine trouble code archive on Web. Copyright EngineTroubleCode. Check engine light comes on Engine stalling or misfiring Engine performance issues Car not starting. If one of these reasons for P code is occuring now you should check P repair processes.
Now don't ask yourself; What should you do with P code? The solution is here :.One of the most common problems with the Honda Accord is when it throws the P trouble code. A trouble code is a code thrown out by an automatic transmission whenever it detects in the Accord that there is an issue that needs your attention.
In the case of the P, it is a general code. This means that it should be accompanied by some other code that should tell you the specific problem. It is possible to get the P code without any other code registering with your Honda Accord. If you get no other code it means that the transmission control circuit is malfunctioning. When P registers by itself can be tricky.
If you are scanning your vehicle right now, you should be looking for a second code that tells you what is actually wrong. Think about it like this. The code will trigger the service engine soon light and may put the vehicle into limp mode.
The code could mean any number of problems with the transmission. You may need to have the vehicle scanned further to figure out what is exactly wrong.
Does the vehicle feel different? If you have felt a change in the way the vehicle has been driving, make sure you know the signs of low transmission fluid …. The easiest way to check for any trouble code with a vehicle is to get a OBD2 scanner.
They are cheap and worth their weight in gold. Otherwise, you can always take your car to the nearest discount auto parts store Autozone, NAPA, etc. Let the scanner tell you all of the trouble codes that the vehicles ECM has and google them, just like you googled this one.
As stated above, it can be anything. This is normal. They want to recreate the problem. If there is a real problem, the code will almost certainly throw again immediately.
Before you take it in, make sure that you check the transmission fluid. If the fluid is a rough color, or worse you find metal flakes in it, that can be a sign that the transmission is going out. The P Code in the Honda Accord is almost always accompanied by another code.
There are vehicle specific trouble codes and there are codes specifically for your manufacturer. Good luck fixing your vehicle. If there is anything that you would like to add, please leave a comment below. Accord P Code Definition If you are scanning your vehicle right now, you should be looking for a second code that tells you what is actually wrong.This code is far too generic to be of use in a repair situation, however armed with this code we can make some general inspections to see if some maintenance can repair the problem for considerably less money.
Eg: Jeep vehicles should be checked with the transmission in the neutral position and of course on a level surface. Remember to take adequate safety precautions like applying the park brake, etc. Make note of the fluid condition, clean and pink or burned and brownish.
Wipe the dipstick with a white paper towel and look for particles in the fluid. If the fluid is low then add fluid but under no circumstance should the fluid level exceed the full level on the dipstick.
Before going on the test drive, shift the transmission selector from neutral to reverse and neutral to drive several times and notice any latency in the engagement of the gears. Reverse is typically slower to engage. On the test drive pay close attention to the shift points for all the gears, and notice any slippage or any other problems under different throttle pressures.
When you return from the test drive wipe the dipstick again and notice if any particles have reappeared.Honda Transmission Repair 1
Look for bubbles in the fluid also. Excessive particles in the fluid usually indicates a transmission that needs replacement. If it needs reprogrammed that can be performed with J tools such as ours. You may want to precede the fluid exchange with a cleaner to clean the transmission and especially the valve body of gum and varnish deposited from the old fluid. At the same time replace the filter assembly and this also allows for a thorough examination of the transmission pan for debris and excessive metal pieces.
The amount of fluid used in a thorough exchange usually varies between 12 and 18 quarts per vehicle and this is controlled by the equipment manufacturer not the vehicle.
It is a good idea to replace the fluid with a synthetic especially if it was organic fluid from the factory as it is only a small price increase difference. If shifting problems were encountered on the test drive, depending on what they were and the severity you may be able to replace just the valve body with an updated remanufactured one and overcome the DTC P and repair the shifting problems. Fortunately, everything you need everything you need to fix it right the first time is right here!
If you understand how the systems were designed to work and how to test them, great! Otherwise you will need factory product service training manuals that will teach you and guide you through the diagnostic phase. You might also need the manufacturer factory service manuals and data systems that provide specifications and details relative to your specific model.
Everything is available here for you as a single source for all your needs. The aftermarket data systems are available in our members only area by direct shipment from the distributor at great pricing.
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