TXRedDevil
08-23-2023, 09:38 AM
Silly me drove off without securing my gas cap after refueling. The drive was from the gas station to my home, about a 2-3 mile drive. The CEL turned on. Crap. I got out and that was the first thing I checked. Went back to the gas station, must've been tossed out or someone kept it. In any case I ordered a new cap from FCP and installed it a week ago: https://www.fcpeuro.com/products/mini-fuel-tank-cap-cooper-16117222391.
Now, I've read many posts in various forums where people claimed that buying a new gas cap solved their problems. But this hasn't worked for me. Yes, I've clicked it shut. I've inspected the seal and its fine (it's brand new). I did find this procedure below from e46fanatics.com and tried it out over the weekend to no avail:
LEAK DIAGNOSIS TEST PRECONDITIONS
The ECM only initiates a leak diagnosis test every second time the criteria are met. The criteria is as follows:
***8226; Engine OFF with ignition switched OFF.
***8226; Engine Control Module still in active state or what is known as "follow up mode" (Main
Relay energized, control module and DME components online for extended period after
key off).
***8226; Prior to Engine/Ignition switch OFF condition, vehicle must have been driven for a minimum
of 20 minutes.
***8226; Prior to minimum 20 minute drive, the vehicle must have been OFF for a minimum of 5
hours.
***8226; Fuel Tank Capacity must be between 15 and 85% (safe approximation between 1/4 -
3/4 of a tank).
***8226; Ambient Air Temperature between -7OC & 35OC (20OF & 95OF )
***8226; Altitude < 2500m (8,202 feet).
***8226; Battery Voltage between 11.5 and 14.5 Volts
When these criteria are satisfied every second time, the ECM will start the Fuel System Leak Diagnosis Test. The test will typically be carried out once a day i.e. once after driving to work in the morning, when driving home in the evening, the criteria are once again met but the test is not initiated. The following morning, the test will run again.
Any advice to clear this would be greatly appreciated, thanks!
Bob
Now, I've read many posts in various forums where people claimed that buying a new gas cap solved their problems. But this hasn't worked for me. Yes, I've clicked it shut. I've inspected the seal and its fine (it's brand new). I did find this procedure below from e46fanatics.com and tried it out over the weekend to no avail:
LEAK DIAGNOSIS TEST PRECONDITIONS
The ECM only initiates a leak diagnosis test every second time the criteria are met. The criteria is as follows:
***8226; Engine OFF with ignition switched OFF.
***8226; Engine Control Module still in active state or what is known as "follow up mode" (Main
Relay energized, control module and DME components online for extended period after
key off).
***8226; Prior to Engine/Ignition switch OFF condition, vehicle must have been driven for a minimum
of 20 minutes.
***8226; Prior to minimum 20 minute drive, the vehicle must have been OFF for a minimum of 5
hours.
***8226; Fuel Tank Capacity must be between 15 and 85% (safe approximation between 1/4 -
3/4 of a tank).
***8226; Ambient Air Temperature between -7OC & 35OC (20OF & 95OF )
***8226; Altitude < 2500m (8,202 feet).
***8226; Battery Voltage between 11.5 and 14.5 Volts
When these criteria are satisfied every second time, the ECM will start the Fuel System Leak Diagnosis Test. The test will typically be carried out once a day i.e. once after driving to work in the morning, when driving home in the evening, the criteria are once again met but the test is not initiated. The following morning, the test will run again.
Any advice to clear this would be greatly appreciated, thanks!
Bob