P0606

Circuit Description

The PCM has two internal processors: the E and the T side. They are connected together and share data on an interconnect called the SPI. The E side sends sensor data to the T side. This sensor data is checked and if the difference in readings between the two processors is too great, DTC P0606 will set.

Conditions for Running the DTC

^ Valid SPI data is being received.
^ Ignition voltage is greater than 10 volts.
^ Ignition on for 5 seconds.

Conditions for Setting the DTC

MAP, ECT or TPS data varies between E side and T side.

Action Taken When the DTC Sets

^ The PCM will illuminate the Malfunction Indicator Lamp (MIL) when the diagnostic runs and fails.
^ The PCM will record operating conditions at the time the diagnostic fails. This information will be stored in the Freeze Frame and Failure Records.

Conditions for Clearing the Message/DTC

^ The PCM will turn the MIL OFF after three consecutive drive trips that the diagnostic runs and does not fail.
^ A Last Test Failed (current) DTC will clear when the diagnostic runs and does not fail.
^ A History DTC will clear after forty consecutive warm-up cycles with no failures of any emission related diagnostic test.
^ Use a scan tool to clear DTCs.
^ Interrupting PCM battery voltage may or may not clear DTCs. This practice is not recommended.

Test Description

Number(s) below refer to the step number(s) on the Diagnostic Table.

2. This DTC indicates an internal PCM problem.