P0619 code meaning
Alternative Fuel Control Module RAM/ROM Error
Powertrain system Generic code P06xx codes Check engine light
What P0619 means
CARB treats gas-fuelled vehicles (CNG, LPG, also the gas mode of bi-fuel cars) like gasoline cars up to model year 2018 and under an approved manufacturer plan afterwards. P0619 means the separate alternative fuel module reports an error in its working memory (RAM, read/write test) or program memory (ROM/flash, checksum) – one code for both, while the engine module uses P0604 and P0605. No manufacturer was found that uses the code; Roush's Ford propane systems report gas module failures as U0108 and the engine module's own memory errors as P0604/P0605. A module whose memory cannot be trusted will typically shut down gas operation: bi-fuel cars run on gasoline, dedicated gas engines may not start. The usual remedies are reprogramming the gas module with a stable supply, then replacement.
P0619 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyHard
- Typical labor0.5 to 2.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0619
- Check engine or gas system warning light
- No gas operation, switch to gasoline
- Starting problems on dedicated gas engines
- Possibly communication code U0108
Common causes of P0619
- Most likelyInterrupted or faulty programming of the gas module
- PossibleVoltage dips, supply, ground or corrosion
- PossibleInternal hardware defect (memory chip)
- Less likelyManufacturer software fault
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Alternative fuel control moduleModule power supply
What each part of P0619 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 6 | Area: computer (engine control module) and output circuits. |
| 19 | The exact fault in that area. |
What to do next
- Note P0619 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P0619
What does P0619 mean?
P0619 means "Alternative Fuel Control Module RAM/ROM Error". CARB treats gas-fuelled vehicles (CNG, LPG, also the gas mode of bi-fuel cars) like gasoline cars up to model year 2018 and under an approved manufacturer plan afterwards. It is a generic code, so it means the same on every make.
Is it safe to drive with P0619?
Drive gently and only to a workshop. With P0619 the car can go into limp mode (reduced power) to protect itself.
Will P0619 fail an emissions test?
Yes, it can. P0619 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P0619 to fix?
Difficulty: hard. A typical repair takes 0.5 to 2.5 hours of work. This is a job for a workshop.
Will P0619 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.