P0402 – EGR Flow Excessive Detected The EGR system is monitored for undesired EGR flow during idle. The EGR monitor looks at the DPF EGR signal at idleand compares it to the stored signal measured during key ON and engine OFF. The test fails when the signal at idle is greater than at...
P0116 Error Description Engine Coolant Temperature Circuit Range/Performance Failure Indicates the engine coolant temperature rationality test has failed. The PCM logic that sets this DTC indicates that engine coolant temperature sensor (ECT or CHT) drifted higher than the nominal sensor calibration curve...