For 1990-2009 cars

### Diagnostic Instructions

• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

• | Review Strategy Based Diagnosis for an overview of the diagnostic approach.

• | Diagnostic Procedure Instructions provide an overview of each diagnostic category.

### DTC Descriptor

DTC P1845: Torque Limit Management

### Circuit/System Description

This diagnostic trouble code (DTC) may set if there is an engine torque limitation caused by requested torque higher than the maximum allowable torque.

### Conditions for Running the DTC

The engine speed is more than 40 RPM.

### Conditions for Setting the DTC

The engine torque output exceeds a maximum allowable torque for 10 minutes.

### Action Taken When the DTC Sets

DTC P1845 is a type A DTC.

### Conditions for Clearing the DTC

DTC P1845 is a type A DTC.

### Reference Information

#### DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

### Circuit/System Verification

1. Ignition ON, observe the scan tool DTC information parameter. DTC P1845 should not set.
2. If the vehicle passes the Circuit/System Verification test, then operate the vehicle within the conditions for running the DTC. You may also operate the vehicle within the conditions that are captured in the Freeze Frame/Failure Records Data List.

### Circuit/System Testing

1. Verify there is not an engine vacuum leak.
2. Test for a parasitic load on the following components:

• | Generator

• | A/C compressor

• | Transmission

⇒ | If a condition is found, repair as necessary.

3. If all conditions test normal, replace the ECM

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

• | Throttle Body Assembly Replacement

• | Control Module References for ECM replacement, setup, and programming