engine light comes on and off. ran a scan got codes p0307 cylinder 7 misfire. p1404 exhaust gas recirculation error #2. some guys say it shouldnt have an egr. some say if its california truck it does. any help would be greatly appreciated.

 

the egr should be easily identified. there should be a huge log that runs to the back of the motor and connects to the exhaust up pipes that feed into the turbo.







about the p0307

CIRCUIT DESCRIPTION
The engine control module (ECM) monitors changes in crankshaft speed using inputs from the crankshaft position (CKP) sensor and the fuel injection control module (FICM). The ECM adjusts the fuel delivery to each cylinder in order to minimize crankshaft speed changes. This DTC will set when the ECM identifies a cylinder or cylinders requiring an excessive amount of fuel in order to maintain the correct crankshaft speed.

CONDITIONS FOR RUNNING THE DTC

• The engine is running at idle for more than 90 seconds .
• The engine coolant temperature (ECT) is more than 56°C (132°F) .

CONDITIONS FOR SETTING THE DTC
The fuel rate adjustment for a cylinder exceeds an acceptable value.

ACTION TAKEN WHEN THE DTC SETS (California)

• The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
• The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. the control module writes the operating conditions to the Freeze Frame and updates the Failure Records.

ACTION TAKEN WHEN THE DTC SETS (Federal)

• The control module stores the DTC information into memory when the diagnostic runs and fails.
• The malfunction indicator lamp (MIL) will not illuminate.
• The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Failure Records.
• The driver information center, if equipped, may display a message.

CONDITIONS FOR CLEARING THE MIL/DTC (California)

• The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
• A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
• A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
• Use a scan tool in order to clear the MIL and the DTC.

CONDITIONS FOR CLEARING THE MIL/DTC (Federal)

• A current DTC Last Test Failed clears when the diagnostic runs and passes.
• A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other non-emission related diagnostic.
• Use a scan tool in order to clear the DTC.

DIAGNOSTIC AIDS
A misfire with no other DTC's will be caused by an engine mechanical or fuel injector problem.



you will have to do a balance rate test if the code keeps on coming back