Engine-Codes - Chrysler - P0891 CHRYSLER

P0891 CHRYSLER Code - TCM Power Relay Sense Circuit High

- Code Popularity: 5,482 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents

|What are the Possible Causes of the P0891 CHRYSLER Code?

  • Faulty Transmission Control Module (TCM) Power Relay
  • Transmission Control Module (TCM) Power Relay harness is open or shorted
  • Transmission Control Module (TCM) Power Relay circuit poor electrical connection

|How to Fix the P0891 CHRYSLER Code?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

|What is the cost to diagnose the P0891 CHRYSLER code?

Labor: 1.0

The cost to diagnose the P0891 CHRYSLER code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|What are P0891 CHRYSLER code possible symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

|What Does the P0891 CHRYSLER Code Mean?

The transmission control relay is used to supply power to the solenoid pack when the transmission is in normal operating mode. When the relay is off, no power is supplied to the solenoid pack and the transmission is in Limp-in mode. The relay output is fed back to the Powertrain Control Module (PCM). It is referred to as the Transmission Control Relay Output circuit or switched battery.
Immediately after a controller reset (ignition key turned to the run position or after cranking engine), the PCM verifies that the relay contacts are open by checking for no voltage at the switched battery terminals. After this is verified, the voltage at the pressure switches is checked. There should be no voltage on the pressure switches at this time. The PCM will then activate the relay.

TCM Power Relay Sense Circuit High

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