P0313

DTC P0313 is designed to allow easy diagnosis of a misfire OR fuel trim DTC, which may have been due to a low fuel condition. If fuel pressure drops due to an inadequate fuel supply at the fuel pump, certain cylinders may have run too lean setting a P0171 or P0174. If the condition worsens, some cylinders may misfire setting DTCs P0300-P0306. DTC P0313 will set if a misfire or system too lean fuel trim DTC is set when the fuel level in the fuel tank is below a certain level.

DTC PARAMETERS
DTC P0313 will set when misfires have been detected or the fuel trim limits have been exceeded (LTFT greater than 8.1% for idle/decel or greater than 23% for cruise/accel) when:
^ Condition exists for longer than 10 seconds
^ Fuel level is less than 3L (0.8 gallons)

DTC P0313 diagnostic runs continuously once the above conditions have been met.

P0313 is a type D DTC.

DIAGNOSTIC AIDS

IMPORTANT:
^ If DTC P0300-P0306 are also set, check FUEL LEVEL in the Scan tool P0300-P0306 Failure Record to verify the misfire condition was due to low fuel level. If this is the case, fill fuel tank above 11L (2.9 gallons) and use Scan tool to monitor MISFIRE CURRENT CYL. # 1-6 to verify no misfires exist. If misfires exist, refer to P0300 or P0301-P0306 diagnostics. P0300 P0301
^ If DTC P0171 or P0174 is also set, check FUEL LEVEL in the Scan tool P0171 or P0174 Failure Record to verify the lean condition was due to low fuel level. If this is the case, fill fuel tank above 11L (2.9 gallons) and use Scan tool to monitor LTFT BN 1-IDLE/DECEL after the engine has been running for 2 minutes. If the percentages are above the ranges listed under DTC parameters, refer to P0171 or P0174 diagnostics. P0171 P0174

DTC P0313 should never set by itself.