2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1345
P2187, P2188, P2189, P2190, P2232, P2235, P2270, P2271, P2272, or P2273 is not set.
* Before the ECM performs the idle test, the vehicle must be driven under the following conditions:
- The engine speed is greater than 915 RPM
- The engine run time is greater than a calibrated value
- Both conditions exist for greater than 15 seconds
* The throttle is in the rest position.
* The intake air temperature (IAT) is between -20 to +250掳C (-4 to +482掳F).
* The ignition voltage is greater than 11 volts.
* The engine coolant temperature (ECT) is between 40-127掳C (104-261掳F).
* The barometric pressure (BARO) is greater than 70 kPa.
* The engine has been idling less than 50 seconds.
* The vehicle speed is less than 2 km/h (1 mph).
* The short term fuel trim is learned.
* The air flow into the engine is between 3-13 g/s.
* The EVAP purge concentration is learned.
* The catalytic converter (TWC) calculated temperature is between 450-250掳C (842-1,742掳F).
* The engine is operating in Closed Loop.
* The transmission is not in P/N (automatic transmission only).
This diagnostic attempts one test during each valid idle period once the above conditions have been met. This diagnostic attempts up to 8 tests
during each drive cycle.
LAU
* DTCs P0010, P0011, P0013, P0014, P0030, P0031, P0032, P0036, P0053, P0097, P0098, P0100, P0101, P0102, P0103, P0106, P0107,
P0108, P0117, P0118, P0121, P0122, P0123, P0128, P0130, P0131, P0132, P0133, P0135, P0137, P0138, P013A, P0140, P0141, P0221,
P0222, P0223, P0300, P0335, P0336, P0341, P0442, P0443, P0446, P0449, P0452, P0453, P0455, P0458, P0459, P0461, P0496, P0502,
P0506, P0507, P167A, P2088, P2089, P2090, P2091, P2096, P2097, P2176, P2195, P2196, P2232, P2237, P2243, P2251, P2270, P2271,
P2297, P2626 are not set.
* The engine speed is between 1,040-2,760 RPM.
* The engine load is between 15-50 percent.
* The engine is operating in Closed Loop.
* The calculated exhaust mass gas flow is between 5-56 g/sec, and stable.
* The calculated catalyst temperature is between 400-850掳C (852-1,562掳F).
* The intake air temperature (IAT) is greater than -15 (5掳F).
This diagnostic attempts one test during each period when the above conditions have been met. This diagnostic attempts up to 4 tests during each
drive cycle.
Conditions for Setting the DTC
The ECM determines that the efficiency of the catalyst has degraded below a calibrated threshold.
Action Taken When the DTC Sets
DTC P0420 and P0430 are Type A DTCs.
Conditions for Clearing the DTC
DTC P0420 and P0430 are Type A DTCs.
Diagnostic Aids
Inspect for the following conditions, which may cause a catalytic converter to degrade:
* An engine misfire
* High engine oil or high coolant consumption
* Retarded spark timing
* A weak or poor spark
* A lean fuel mixture
* A rich fuel mixture
* A damaged oxygen sensor or wiring harness
Reference Information
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
