Engine-Codes - Gmc - P1051 GMC

P1051 GMC Code - Reductant Heater 1 Driver High Temperature

- Code Popularity: 182 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 2/3
Table of contents

|What are the Possible Causes of the P1051 GMC Code?

  • Faulty Reductant Line Heater
  • Reductant Line Heater harness is open or shorted
  • Reductant Line Heater circuit poor electrical connection
  • Faulty Reductant Pump and Sensor Assembly
  • Faulty Reductant Control Module

|How to Fix the P1051 GMC 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 P1051 GMC code?

Labor: 1.0

The cost to diagnose the P1051 GMC 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 P1051 GMC code possible symptoms?

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

|What Does the P1051 GMC Code Mean?

As reductant will freeze at temperatures below -11°C (12°F), there are 2 reductant heaters. Reductant heater 1 is integral to the Emission Reduction Fluid Supply Pump Module, located in the reductant tank. Reductant heater 2 is located in the supply line to the reductant injector. The Engine Control Module (ECM) monitors the reductant temperature in the tank in order to determine if the fluid is below its freeze point. If the ECM determines that the reductant may be frozen, it activates a "defrost strategy", by energizing the reductant heaters. The heaters are deactivated when the fluid temperature exceeds a calibrated value. The Diagnostic Trouble Code (DTC) will be set when the ECM indicates the reductant tank heater temperature is over the calibrated threshold for greater than 5 s.

Reductant Heater 1 Driver High Temperature

|Need more information with the P1051 GMC code?

Need more information on how to fix the P1051 GMC code?
Get Access to Factory Service Manuals

|Need help with a P1051 GMC code?

Get the p1051 gmc code diagnosed by a professional: Find a repair shop in your area