Cold Start Fuel Pressure Performance Bank 2
During cold-start the ECU runs an elevated rail pressure on direct-injection systems for better cold spray atomisation. The pressure target on bank 2 is not reached within the calibrated time window - typical for a high-pressure pump that loses output when cold or a pressure regulator with cold-stickiness.
Affected components
- High pressure pump b2
- Fuel pressure regulator b2
- Fuel rail b2
Common causes
- High likelihood: HP pump output low when cold
Possible symptoms
- Check engine light on
- Hard start, no start, or stalling under load
- Power loss especially at high load or rpm
- Possible long cranking time
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.