P0313

Description

Misfire detected with low fuel level

Common Symptoms

• Check Engine Light with misfire detected specifically at low fuel levels
• Engine misfires and hesitation when fuel tank is nearly empty
• Rough running and performance issues at low fuel conditions
• Intermittent misfires correlated with fuel level
• Fuel starvation symptoms during acceleration or cornering
• Engine performance degradation when fuel is low

Possible Causes

• Fuel pump overheating or cavitation at low fuel levels
• Fuel pickup issues when tank is nearly empty
• Debris in fuel tank being drawn into system
• Fuel pump design issues causing starvation
• In-tank fuel pump cooling problems
• Fuel level sensor accuracy issues

Diagnosis Steps

1. Monitor misfire occurrences relative to fuel level
2. Test fuel pressure at various fuel levels
3. Inspect fuel pump and pickup assembly
4. Check for debris in fuel tank
5. Verify fuel level sensor accuracy
6. Test fuel pump cooling and operation

Repair Solutions

• Keep fuel tank above 1/4 full to prevent issues
• Replace or repair fuel pump if overheating
• Clean fuel tank and replace filter if debris present
• Address fuel pickup design issues if applicable
• Replace faulty fuel level sensor
• Reset fuel system adaptations

Prevention Tips

• Maintain fuel level above 1/4 tank
• Regular fuel filter replacement
• Address fuel delivery issues promptly