Check engine light came on. Checked the codes and they are $7E8 and $7E9. What are these codes for?
Nov 19, 2020 at 1:39 AM
2016 Kia Forte P0456 EVAP Leak
JTVICE
- MEMBER
- 2 POSTS
Hi JT...
7E8 this is not code but a menu for the engine data stream. You will also have a 7E9 and this is for the transmission.
Different scan tools display engine powertrain, transmission, and ABS system separately. These 3 control modules allow the scan tool to read data.
The fault codes will be in the engine control module, but the 7E8 is letting you know there are codes. You need to select the engine control module to read those codes. The same for 7E9.
When you retrieve the codes (if there are any), signal back if you need assistance in the code meaning...
Glenn...
7E8 this is not code but a menu for the engine data stream. You will also have a 7E9 and this is for the transmission.
Different scan tools display engine powertrain, transmission, and ABS system separately. These 3 control modules allow the scan tool to read data.
The fault codes will be in the engine control module, but the 7E8 is letting you know there are codes. You need to select the engine control module to read those codes. The same for 7E9.
When you retrieve the codes (if there are any), signal back if you need assistance in the code meaning...
Glenn...
Nov 19, 2020 at 8:42 AM
Is this a Euro car? please use this guide to retrieve the obd2 codes and get back to us.
https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing
Please run down this guide and report back.
https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing
Please run down this guide and report back.
Nov 20, 2020 at 11:43 PM
It's a 2016 Kia Forte. I did connect my code reader again and this time I got it give me the actual code for the $07E8... Gave me error P0456 - "Evaporative Emission System Leak Detected (very small leak)" The code reader had nothing under the $7E9, however. I asked my question on here because I was finding conflicting information about what the codes mean.
Nov 21, 2020 at 12:20 AM
Thanks for the info JT...
You are correct in the definition of the code. This indicates an 'air pressure' loss for the evaporative emission control system. This is "not" meaning that there is a fuel leak.
Possible causes:
Fuel filler cap damage or missing
Faulty or damaged fuel filler pipe
Leaking, disconnected or plugged fuel vapor lines
Faulty CCV (Canister Close Valve)
Faulty PCSV (Pressure/Purge Control Solenoid Valve)
Faulty Canister
Faulty FTPS (Fuel Tank Pressure Sensor)
Faulty seal of the fuel pump
The (by far) most common reason for this code is the fuel filler cap. This does not effect drivability, but this is an emissions related code that would cause you to fail a Smog Check inspection if they are done in your area.
Recommendation: (1) Contact your Dealer/Manufacturer and inform them of the "Emissions" related code that you are getting and question if the diagnostic/repair is covered under warranty. Most Manufacturers are required to cover most emissions related issues for 6 years... and it's Free! (2) If '1' is unsuccessful, replace the fuel cap -- clear codes -- using your scanner (which you obviously have) and have it run an "EVAP Leakage Test" (conditions needed before test -- engine is warmed up and running at idle, no trouble codes, fuel level in tank between 15% and 80%). If is passes, you are done! If not, then -- (3) Get a 'smoke test' on the EVAP system because the leak can be as small as a sewing needle hole that you'll never be able to visually find. With a smoke test, then you can.
The pic is where your components are at that are EVAP system related.
1. Purge Control Solenoid Valve (PCSV)
2. Vapor line
3. ORVR valve (On-board Refueling Vapor Recovery)(it controls the fuel vapors to the EVAP canister during refueling)
4. Fuel tank air filter
5. Canister Close Valve (CCV)
6. Canister
7. Fuel Tank Pressure Sensor (FTPS)
It's been a pleasure, and I hope this helps. Let me know the outcome, or if you need further information.
Thanks for using 2CarPros. Glenn...
You are correct in the definition of the code. This indicates an 'air pressure' loss for the evaporative emission control system. This is "not" meaning that there is a fuel leak.
Possible causes:
Fuel filler cap damage or missing
Faulty or damaged fuel filler pipe
Leaking, disconnected or plugged fuel vapor lines
Faulty CCV (Canister Close Valve)
Faulty PCSV (Pressure/Purge Control Solenoid Valve)
Faulty Canister
Faulty FTPS (Fuel Tank Pressure Sensor)
Faulty seal of the fuel pump
The (by far) most common reason for this code is the fuel filler cap. This does not effect drivability, but this is an emissions related code that would cause you to fail a Smog Check inspection if they are done in your area.
Recommendation: (1) Contact your Dealer/Manufacturer and inform them of the "Emissions" related code that you are getting and question if the diagnostic/repair is covered under warranty. Most Manufacturers are required to cover most emissions related issues for 6 years... and it's Free! (2) If '1' is unsuccessful, replace the fuel cap -- clear codes -- using your scanner (which you obviously have) and have it run an "EVAP Leakage Test" (conditions needed before test -- engine is warmed up and running at idle, no trouble codes, fuel level in tank between 15% and 80%). If is passes, you are done! If not, then -- (3) Get a 'smoke test' on the EVAP system because the leak can be as small as a sewing needle hole that you'll never be able to visually find. With a smoke test, then you can.
The pic is where your components are at that are EVAP system related.
1. Purge Control Solenoid Valve (PCSV)
2. Vapor line
3. ORVR valve (On-board Refueling Vapor Recovery)(it controls the fuel vapors to the EVAP canister during refueling)
4. Fuel tank air filter
5. Canister Close Valve (CCV)
6. Canister
7. Fuel Tank Pressure Sensor (FTPS)
It's been a pleasure, and I hope this helps. Let me know the outcome, or if you need further information.
Thanks for using 2CarPros. Glenn...
Image (Click to enlarge)
Nov 21, 2020 at 4:32 AM
Suggested Repair
Treat $7E8 and $7E9 as module menus, not fault codes. For P0456, ask the dealer whether the emissions diagnosis is still under warranty. If not, replace the fuel filler cap, clear the code, and run an EVAP leak test with the engine warm at idle, no codes, and fuel between 15% and 80%. If it fails, have the EVAP system smoke-tested for a very small leak.
Conversation Summary
The owner of a 2016 Kia Forte saw a check engine light and codes labeled $7E8 and $7E9. Experts explained these identify the engine and transmission modules rather than the faults themselves. After selecting the engine module, the reader showed P0456, a very small EVAP leak, with nothing under $7E9. The expert said this is an emissions issue, not a drivability or fuel-leak problem, and that a loose or damaged fuel cap is the most common cause. Other possible causes include vapor lines, the canister, close or purge valves, the tank pressure sensor, or the fuel-pump seal. Recommended steps were to check emissions warranty coverage, replace the cap and retest, then smoke-test the system if the code returns.