2010 Cadillac CTS Sedan AWD V6-3.6L Page 1786
* DTCs P0068, P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0120, P0121, P0122, P0123, P0220,
P0222, P0223, P0201, P0202, P0203, P0204, P0205, P0206, P0300, P0335, P0336, P0351, P0352, P0353, P0501, P0502, P0506, P0507,
P0601, P0602, P0603, P0604, P0606, P0607, P060D, P062F, P0641, P0651, P1101, P1516, P1682, P2101, P2119, P2120, P2122, P2123,
P2125, P2127, P2128, P2135, P2138, P2176, P2610 are not set.
This DTC runs for 12 s within the first 17 s of start-up, or until the calculated catalyst temperature is greater than 900掳C (1,652掳F). This diagnostic
runs once per trip when a cold start has been determined.
Conditions for Setting the DTC
The actual exhaust energy model does not match the expected exhaust energy model.
Action Taken When the DTC Sets
DTC P1400 is a Type A DTC.
Conditions for Clearing the MIL/DTC
DTC P1400 is a Type A DTC.
Reference Information
Description and Operation
Engine Control Module Description (See: Powertrain Management/Computers and Control Systems/Description and Operation/Engine Control
Module Description)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Diagnostic Aids
Any loading of the engine that lowers engine RPM, such as with partial application of the clutch, A/C cycling etc., during the first 17 s of engine
run time may set this DTC.
Circuit/System Verification
1. Allow the engine to cool.
2. Start and idle the engine for at least 2 min.
3. DTC P1400 should run and pass.
Circuit/System Testing
* Inspect the air intake system for the following:
- Damage, restriction, or modification
- Dirty or deteriorating air filter element
- Crankcase ventilation system for correct operation-Refer to Crankcase Ventilation System Inspection/Diagnosis (See: Powertrain
Management/Emission Control Systems/Positive Crankcase Ventilation/Testing and Inspection).
- Water intrusion
- Vacuum leak and other un-metered air downstream of the mass air flow (MAF) sensor
- Intake manifold leak
* Inspect the exhaust system for the following:
- Water intrusion
- Exhaust leak
- Damaged, restricted, modified or enhanced exhaust system-Refer to Symptoms - Engine Exhaust (See: Engine, Cooling and
Exhaust/Exhaust System/Testing and Inspection/Symptoms - Engine Exhaust).
* Inspect the engine mechanical for items that could alter the air flow into the combustion chamber. Refer to Symptoms - Engine Mechanical (
See: Engine, Cooling and Exhaust/Engine/Testing and Inspection/Symptom Related Diagnostic Procedures/Symptoms - Engine Mechanical).
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
