P0401 - EGR Flow Insufficient Detected
The EGR system is monitored during steady state
driving conditions while the EGR is commanded on. The test fails when the signal
from the DPF EGR sensor indicates that EGR flow is less than the desired
minimum.
- Vacuum supply
- EGR valve stuck closed
- EGR valve leaks vacuum
- EGR flow path restricted
- EGRVR circuit shorted to PWR
- VREF open to DPF EGR sensor
- DPF EGR sensor downstream hose off or plugged
- EGRVR circuit open to PCM
- VPWR open to EGRVR solenoid
- DPF EGR sensor hoses both off
- DPF EGR sensor hoses reversed
- Damaged EGR orifice tube
- Damaged EGRVR solenoid
- Damaged PCM
P1299 - Cylinder Head Over Temperature Protection
Active
Indicates an engine overheat condition was detected by
the cylinder head temperature (CHT) sensor. An FMEM Strategy called Fail-safe
Cooling was activated to cool the engine.
- Engine cooling system concerns
- Low engine coolant level
- Base engine concerns
P0300 - Random Misfire
The random misfire DTC indicates multiple cylinders
are misfiring or the PCM cannot identify which cylinder is misfiring.
- Camshaft position sensor (CMP)
- Low fuel: less than 1/8 tank
- Stuck open EGR valve
P0443 - EVAP Control System Canister Purge Valve
Circuit Malfunction
The PCM monitors the EVAP canister purge valve circuit
for an electrical failure. The test fails when the signal moves outside the
minimum or maximum allowable calibrated parameters for a specified purge duty
cycle by PCM command.
- VPWR circuit open
- EVAP canister purge valve circuit shorted to GND
- Damaged EVAP canister purge valve
- EVAP canister purge valve circuit open
- EVAP canister purge valve circuit shorted to VPWR
- Damaged PCM
P1451 - EVAP Control System Canister Vent Solenoid
Circuit Malfunction
Monitors the canister vent (CV) solenoid circuit for
an electrical failure. The test fails when the signal moves outside the minimum
or maximum allowable calibrated parameters for a specified canister vent duty
cycle by PCM command.
- VPWR circuit open
- CV solenoid circuit shorted to PWR GND or CHASSIS GND
- Damaged CV solenoid
- CV solenoid circuit open
- CV solenoid circuit shorted to VPWR
- Damaged PCM
P1309 - Misfire Monitor Disabled
When the misfire monitor is disabled, usually due to
the input signal generated by the camshaft position (CMP) sensor, by sensing the
passage of teeth from the CMP wheel.
- Camshaft position sensor
- Powertrain control module
- ECT, MAF, and CKP sensors
with the codes you have here I would look in the direction of the egr valve first because that will cause the bucking and stalling, and the misfires, but so will the canister vent solonoid. the misfire codes and the cylinder overtemp code could be from overheating or because if the misfires.
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