AutoCodes – Chevrolet – P1051 Chevrolet

P1051 Chevrolet Code - Reductant Heater 1 Driver High Temperature

Quick Answer

As reductant will freeze at temperatures below -11°C (12°F), there are 2 reductant heaters. Common causes include Faulty Reductant Line Heater, Reductant Line Heater harness is open or shorted, Reductant Line Heater circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P1051 Chevrolet indicates Reductant Heater 1 Driver High Temperature.
Common causes: Common causes include Faulty Reductant Line Heater, Reductant Line Heater harness is open or shorted, Reductant Line Heater circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 800

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 24, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1051 Chevrolet Description

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.

OBDII Code P1051 Chevrolet - Reductant Heater 1 Driver High Temperature - AutoCodes.com — P1051 Chevrolet Code - Reductant Heater 1 Driver High Temperature

What does this mean?

What are the Possible Causes of the DTC P1051 Chevrolet?

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 DTC P1051 Chevrolet?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1051 Chevrolet code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1051 Chevrolet Code

1. What are common symptoms of OBDII code P1051 on a Chevrolet related to the Reductant Heater 1 Driver High Temperature?

- Common symptoms include the check engine light coming on, reduced engine power, and potential exhaust system issues.

2. What are the possible causes of OBDII code P1051 on a Chevrolet indicating Reductant Heater 1 Driver High Temperature?

- Possible causes may include a faulty reductant heater, damaged wiring or connectors, a defective reductant heater control module, or a software issue.

3. How can I diagnose the issue related to OBDII code P1051 on my Chevrolet?

- It is recommended to use a diagnostic scanner to read the fault codes, inspect the wiring and connectors for damage, and test the reductant heater and control module for proper functionality.

4. Can I continue driving my Chevrolet with OBDII code P1051 present?

- It is not recommended to continue driving with this code active, as it can lead to further damage and potential emissions system issues.

5. How can I repair OBDII code P1051 on a Chevrolet myself?

- Repair tips may include checking and repairing damaged wiring, replacing the reductant heater if faulty, or resetting the control module after any repairs have been made.

6. Is it necessary to visit a mechanic for OBDII code P1051 on a Chevrolet?

- While some DIY repairs are possible, seeking professional help from a mechanic with experience in emissions system diagnostics is recommended for proper diagnosis and repair.

7. Are there any recalls or technical service bulletins related to OBDII code P1051 on Chevrolet vehicles?

- It is advisable to check with Chevrolet or a trusted dealership for any relevant recalls or technical service bulletins related to this specific OBDII code.

8. What is the function of the Reductant Heater 1 Driver in a Chevrolet emissions system?

- The Reductant Heater 1 Driver helps control the temperature of the reductant fluid used in the emissions system to reduce harmful emissions.

9. Can weather conditions affect the occurrence of OBDII code P1051 on a Chevrolet?

- Extreme weather conditions can potentially impact the performance of the reductant heater and trigger the OBDII code P1051, especially in colder climates.

10. How can I prevent OBDII code P1051 from appearing on my Chevrolet in the future?

- Regular maintenance, such as inspecting and cleaning the emissions system components, checking wiring for damage, and addressing any related issues promptly, can help prevent the recurrence of this code.