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Home >> Audi >> 2009 >> A4 Base, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (3.2L - Generic Scan Tool, Engine Code: BKH) >> ST - Generic Scan Tool >> Diagnostic Trouble Code (DTC) tables >> SAE P1xxx DTCs >> Fuel and Air Ratios, Control Module

Fuel and Air Ratios, Control Module

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DTC Error Message Diagnostic Procedure Malfunction Criteria and Threshold Value Secondary Parameters with Enable Conditions Monitoring Time Length Frequency of checks, MIL Illum
P12A1 Fuel Rail Pressure Sensor Inappropriately High
  • Deviation fuel rail pressure control -0.015 g
  • And Deviation lambda control -25%
  • Fuel cut off, Not active
  • Engine speed, 640-3480 rpm
  • Time after engine start, >250 sec.
  • High pressure pump set point, 0.005-0.05 g
  • Lambda control, Closed loop
  • EVAP canister load, 25%
 5 Seconds
  • Continuous
  • 2 DCY
P12A2 Fuel Rail Pressure Sensor Inappropriately High
  • Deviation fuel rail pressure control -0.01 g
  • And Deviation lambda control >30%
  • Fuel cut off, Not active
  • Engine speed, 640-3480 rpm
  • Time after engine start, >250 sec.
  • High pressure pump set point, 0.005-0.05 g
  • Lambda control, Closed loop
  • EVAP canister load, 25%
 5 Seconds
  • Continuous
  • 2 DCY
P12A4 Fuel Rail Pump Control Valve Stuck Closed
  • Deviation fuel rail pressure control -0.025 g
  • And Deviation lambda control -1010%
  • Fuel cut off, Not active
  • Engine speed, 640-3480 rpm
  • Time after engine start, >250 sec.
  • High pressure pump set point, 0.005-0.05 g
  • Lambda control, Closed loop
  • EVAP canister load, 25%
 5 Seconds
  • Continuous
  • 2 DCY
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