Alternative Fuel Control Module RAM/ROM Error
The P0619 code indicates an internal memory error (RAM/ROM) within the Alternative Fuel Control Module (AFCM). This module manages the operation of alternative fuel systems such as CNG, LPG, or ethanol. The error suggests a hardware or firmware failure, which can cause incorrect fuel delivery, poor engine performance, or inability to run on alternative fuel. This is a serious issue as it may affect the vehicle's ability to operate properly on alternative fuel and could potentially lead to engine damage if not addressed.
01. Most Common Causes
- Faulty Alternative Fuel Control Module (AFCM)
- Corrupted software or firmware in AFCM
- Internal electrical failure within AFCM
- Intermittent power or ground to AFCM
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Engine runs poorly on alternative fuel or fails to switch to alternative fuel
- Reduced fuel economy when using alternative fuel
- Engine stalling or hesitation
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to verify the code and check for additional related codes.
Step 2: Inspect the AFCM and its wiring for damage, corrosion, or loose connections.
Step 3: Check power and ground circuits to the AFCM using a multimeter.
Step 4: If wiring is intact, attempt to reprogram the AFCM with updated software from the manufacturer.
Step 5: If reprogramming fails, replace the AFCM and perform necessary relearn procedures.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive with this code, especially if the vehicle is running on alternative fuel. The error can cause improper fuel delivery, leading to poor performance, stalling, or potential engine damage. If the vehicle can operate on gasoline, you may drive cautiously to a repair shop, but avoid prolonged use on alternative fuel.
How much does it cost to fix?▼
The cost to fix P0619 typically ranges from $200 to $600, depending on the vehicle make and model. This includes diagnostic time (1-2 hours at $100-$150/hour) and the cost of a new AFCM module ($100-$300) plus labor for replacement and reprogramming.