Test Description

WARNING: This page is about a different car, the 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

The number below refers to the step number on the diagnostic table.

3: A mechanical condition can cause this DTC to set. Inspect accessory drive components for a condition that could cause excessive drag on the engine.

DTC P1845 Torque Limit Management

Step	Action	Yes	No
Schematic Reference: Engine Controls Schematics Connector End View Reference: Engine Control Module (ECM) Connector End Views or Engine Controls Connector End Views
1	Did you perform the Diagnostic System Check-Engine Controls?	Go to Step 2	Go to Diagnostic System Check - Engine Controls
2	Are any other DTCs set?	Go to Diagnostic Trouble Code (DTC) List	Go to Step 3
3	Inspect for an engine vacuum leak. Did you find and correct the condition?	Go to Step 6	Go to Step 4
4	Inspect for a parasitic load on the engine. Inspect the following components: Generator A/C compressor Transmission Did you find and correct the condition?	Go to Step 6	Go to Step 5
5	Replace the engine control module (ECM). Refer to Engine Control Module (ECM) Replacement . Did you complete the replacement?	Go to Step 6	-
6	Clear the DTCs with a scan tool. Turn OFF the ignition for 30 seconds. Start the engine. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records. Did the DTC fail this ignition?	Go to Step 2	Go to Step 7
7	Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed?	Go to Diagnostic Trouble Code (DTC) List	System OK