P0700 – Transmission Control System Malfunction

 

P0700: DIY Repairing Video Tutorial

https://youtu.be/2SWS5-R-3kg

Check out nonda Auto DIY Center for more engine error code repairing videos.
https://www.youtube.com/playlist?list=PL-Lyko0O0oxHe1AGvzwAz-wokJPXAtW97

P0700: What does it mean?

The code P0700 means Transmission Control System Malfunction. 

The Transmission Control Module (TCM) is part of the Powertrain Control Module(PCM) and is in charge of the transmission system. The TCM will store and indicate the code P0700 when malfunctions were detected. It’s a general code and you can check other accompanied codes for more details.

Severity: HIGH

Difficulty of diagnosis or repair: 5 out of 5

P0700: Possible Symptoms

P0700 could indicate severe problems in the transmission system. 

• Engine Light ON (or Service Engine Soon Warning Light)
• Driveability problems
• Transmission shifting problems

P0700: Possible Causes

There are many possible causes for the code P0700, including:

• Transmission fluid is dirty or at a low level
• Open/Short in the wiring harness
• Faulty Transmission Control Module (TCM)
• Defective shift solenoids
• Defective valve body
• Malfunctioning engine coolant temperature sensor
• Faulty transmission control module or a faulty transmission

Possible Checks/Fixes you can do yourself:

When you see a DTC Code P0700, there’re several checks you can do:

1. The P0700 is a general code, and it’s always companied by other codes that indicate the real reason behind it. If you see other codes, read about them and try to find if the P0700 code is the result of other problems. Also, if you can feel a strong drivability problem, such as sticking shifts, please take the car to a manufacturer to get some detailed checking.
2. Check the Transmission Fluid to see its conditions and level. You may find a low fluid level or a bad condition(such as dirty transmission fluid) and this is a big reason that may cause many transmission problems, such as transmission slipping and worn out transmission parts.
3. If the transmission fluid is in good condition and level, or you have replaced the fluid, and the code is still present, check the wires between ECU and TCM. A disconnection between them also may set the TCM malfunction and indicate a P0700 code.
4. What’s more, check the hoses of Transmission Fluid and make sure that it’s not broken or leaked. 
5. If all the parts mentioned above are in good condition and the Code is still on after several drive cycles, or you can feel a strong drivability problem such as sticking shifts, please take the vehicle to your technician and let them do the checks. They will do advanced tests and fixes that you cannot complete without professional tools and make sure the vehicle is safe for you to drive around.

How much is the cost to clear P0700?

For car code P0700, several repairs may apply, and the cost estimations are below:

• Fix/Replace the valve body: $320 – $900
• Fix/Replace the transmission control module(TCM): $840 – $900
• Fix/Replace the transmissions: $1800 – $4500

Frequently Asked Questions:

Q: Can I drive with the code P0700?

A: Don’t drive if you have severe drivability problems, such as a sticking shift, as it will be very dangerous.

P0442 – Evaporative Emission Control System Leak Detected Small Leak

P0442: What does it mean?

The Codes P0442 indicates that a small leak is detected in the Evaporative Emission Control System(EVAP).

The EVAP is designed to prevent your gasoline vapor from leaking into the atmosphere. It is monitored by the Powertrain Control Module(PCM), and the computer will notify a DTC P0442 when a small leak is detected. Similar codes are P0455 (EVAP control system leak detected large leak) and P0456 (EVAP control system leak detected very small leak). All three codes have similar possible symptoms and causes, as well as simple fixes you can do yourself. Generally, P0456 and P0442 are more difficult to diagnose, as you can hardly see clearly cracked hoses or connectors. 

Severity: Low

Not important, as you mostly will not notice anything other than the engine light on. But it should be addressed as you cannot pass the emission test with it present.

Difficulty of diagnosis or repair: 3 out of 5

P0442: DIY Repairing Video Tutorial

Check out nonda Auto DIY Center for more engine error code repairing videos.
https://www.youtube.com/playlist?list=PL-Lyko0O0oxHe1AGvzwAz-wokJPXAtW97

P0442 Possible Symptoms

As it’s a minor leak, P0442 will not always show itself except the engine light/service engine soon warning light on. Sometimes, you may notice a small fuel odor caused by the leak.

• Engine Light ON (or Service Engine Soon Warning Light)
• Possible a noticeable fuel odor caused by the release of fuel vapors

P0442: Possible Causes

There are many possible causes for the code P0442, including:

• Missing or loose fuel cap
• Incorrect fuel filler cap used
• Fuel filler cap remains open or fails to close
• Foreign matter caught in the fuel filler cap
• EVAP canister or fuel tank leaks
• EVAP system hose leaking
• Fuel tank leaking

Possible Checks/Fixes you can do yourself:

When you see a DTC Code P0442, there’re several checks you can do:

1. Check the code from your OBD2 Scanner / Car Code Scanner and verify that it’s the only code present. If other codes are on the list, they should be checked first.
2. If you have other codes such as P0441, P0440 or P0456, the issue might be a solenoid failure or a more complex system leak. Address these issues first.
3. If Code P0442 is the only code present, check your gas cap to see if it’s open or loose. Tighten your gas cap will usually solve the problem. 
4. After you tighten the gas cap, the engine light may turn off after several drive cycles. Refer to this article about the drive cycle. It will be completed mostly after a normal day drive.
5. If the engine light doesn’t go off, inspect your gas cap for physical damage or deterioration. It’s not always noticeable, you can try to replace your gas cap as it’s not expensive. It usually will clear the codes P0442.
6. If the fuel cap didn’t fix it, you should consider performing an EVAP system leak check. You can do it in most repair shops and car dealers. They will usually perform a smoke check through your EVAP and the smoke will show if there’s any leak from any hoses or seals. 

How much is the cost to clear P0442?

For car code P0442, several repairs may apply, and the cost estimations are below:

• Replace the Gas Cap: $20-$60
• EVAP Line: $20-$100
• EVAP Vent Control Valve: $150-$200
• Purge Volume Control Valve: $150-$200

Frequently Asked Questions:

Q: Can I drive with the code P0442?

A: Yes, you may drive your vehicle with Code P0442 unless you smell or see a serious fuel/liquid leaks.

P0455 – Evaporative Emission Control System Leak Detected Gross Leak

P0455: What does it mean?

The Code P0455 means that a gross leak is detected in the Evaporative Emission Control System(EVAP). 

The EVAP is designed to prevent gasoline vapors in the fuel tank from leaking into the atmosphere. It is monitored by the Powertrain Control Module (PCM) and when the computer detects a large leak in EVAP, it will turn on the engine light and send the Code P0455.

Similar codes are P0442 and P0456, which are EVAP small and EVAP very small leak detected. Click the hyperlinks to know more about the three codes.

Severity: Low

Although it’s said to be a gross leak, you may not feel anything other than the check engine light. But it should be fixed before you go to any emission test as it will fail the test. 

Difficulty of diagnosis or repair: 2 out of 5

P0455: DIY Repairing Video Tutorial

Check out nonda Auto DIY Center for more engine error code repairing videos.
https://www.youtube.com/playlist?list=PL-Lyko0O0oxHe1AGvzwAz-wokJPXAtW97

P0455 Possible Symptoms

P0455 is not always noticeable except the engine light/service engine soon warning light. Sometimes, you can smell gasoline fuel in the filler area or tank area. The fuel efficiency might be affected by this code. 

• Engine Light ON (or Service Engine Soon Warning Light)
• Possible a noticeable fuel odor caused by the release of fuel vapors
• Decreased fuel efficiency

P0455 Possible Causes

There are many possible causes for the code P0455, including:

• Missing or loose fuel cap
• Incorrect fuel filler cap used
• Fuel filler cap remains open or fails to close
• Foreign matter caught in fuel filler cap
• EVAP canister or fuel tank leaks
• EVAP system hose leaking
• Fuel tank leaking

Possible Checks/Fixes you can do yourself

When you see a Diagnostic Trouble Code P0455, there are several checks you can do:

1. Check the diagnostic trouble code from your OBD2 Scanner / Car Code Scanner and verify that it’s the only code present. If other codes are on the list, they should be checked first, as they might have caused the code P0455.
2. If you have other codes such as P0441 or P0440, the issue might be a solenoid failure or a more complex system leak. Address these issues first.
3. If Code P0455 is the only code present, check your gas cap to see if it’s open or loose. Tighten your gas cap and the code might be cleared. And this is why the Code P0455 is the most common diagnostic trouble code searched on google.
4. After you tighten the gas cap, the engine light may turn off after several drive cycles. Or you can clear the code with your obd2 scanner and see if the code comes back after several drive cycles. Refer to this article about the drive cycle. It will be completed mostly after a normal day drive. 
5. If the engine light doesn’t go off(or comes back again), inspect your gas cap for physical damage or deterioration. It’s not always noticeable, you can try to replace your gas cap as it’s not expensive. It usually will clear the codes P0455.
6. If a replaced fuel cap didn’t fix it, you can check for aged, cracked or disconnected hoses of the EVAP near or connected to the engine air box. This is a common problem for old cars because of aged rubber hoses and dry-out gaskets. Replace the hoses and clear the code.
7. If a replaced hose doesn’t solve the problem and the code comes back again, you should consider performing an EVAP system leak check. You can do it in most repair shops and car dealers. They will usually perform a smoke check through your EVAP and the smoke will show if there’s any leak from any hoses or seals.

How much is the cost to clear P0455?

For car code P0455, several repairs may apply, and the cost estimations are below:

• Replace the Gas Cap: $20-$60
• EVAP Line: $20-$100
• EVAP Vent Control Valve: $150-$200
• Purge Volume Control Valve: $150-$200

Frequently Asked Questions

Q: Can I drive with the code P0455?

A: You may drive your vehicle with Code P0455 unless you smell or see a serious fuel/liquid leak.

P1450 – Unable To Bleed Up Fuel Tank Vacuum

P1450 Possible Causes

Blocked EVAP canister or vent solenoid

Kinked or collapsed hose between canister and fuel tank

Faulty Fuel Tank Pressure (FTP) sensor

Fuel filler cap stuck closed, preventing vacuum relief

P1450 Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

Description

The Powertrain Control Module (PCM) Monitors the fuel vapor vacuum and pressure in the fuel tank. System failure occurs when the Evaporative Emission (EVAP) running loss monitor detects excessive fuel tank vacuum with the engine running, but not at idle.