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7ea P0738 engine code 2006 Cadillac CTS. What do these codes mean?

Vehicle: 2006 Cadillac CTS

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Those are not code, engine code would have a P0XXX or P1XXx these are system

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The code 7EA is not an OBDII code. When the OBDII scanner plugs in your vehicle, the OBDII scanner gets the 7EA ($7EA) code from the ECM. The code is a menu of systems that the OBDII scanner can access. OBDII scanner interprets the code and displays the menu. Some scanners can't solve these codes and show the codes instead of the interpretation. Clicking on the code menu will read the OBDII codes (e.g. P0420 or P0455), if any, from that system.

Menu Code 7E8 ($7E8): Engine System

Menu Code 7E9 ($7E9): Transmission System

Menu Code 7EA ($7EA): Engine Management

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