AutoCodesCadillac – P1052 Cadillac

P1052 Cadillac Code - Reductant Heater 2 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
P1052 Cadillac indicates Reductant Heater 2 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 618
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jul 24, 2021
💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1052 Cadillac 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 P1052 Cadillac - Reductant Heater 2 Driver High Temperature - AutoCodes.com
P1052 Cadillac Code - Reductant Heater 2 Driver High Temperature

What are the Possible Causes of the DTC P1052 Cadillac?

  • 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 P1052 Cadillac?

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 P1052 Cadillac 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.

Need more information about the P1052 Cadillac code?

Need more information on how to fix the P1052 Cadillac code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1052 Cadillac code diagnosed by a professional: Find a repair shop in your area

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 P1052 Cadillac Code

1. What are the common symptoms of OBDII code P1052 in a Cadillac related to the Reductant Heater 2 Driver High Temperature issue?

- Common symptoms include the check engine light coming on, reduced engine performance, and potential emissions system malfunctions.

2. What could cause the OBDII code P1052 in a Cadillac indicating Reductant Heater 2 Driver High Temperature?

- Possible causes may include a faulty reductant heater, wiring issues, a malfunctioning temperature sensor, or a problem with the engine control module.

3. How serious is the OBDII code P1052 Cadillac error related to Reductant Heater 2 Driver High Temperature?

- The issue should be addressed promptly to prevent potential damage to the emissions control system and ensure proper vehicle performance.

4. Can I continue driving my Cadillac with the OBDII code P1052 error for Reductant Heater 2 Driver High Temperature?

- It is not recommended to continue driving the vehicle with this error, as it could lead to increased emissions and potential engine performance issues.

5. How can I diagnose and repair the OBDII code P1052 Cadillac problem regarding Reductant Heater 2 Driver High Temperature?

- Diagnosis typically involves inspecting the reductant heater components, checking the wiring for any damage, testing the temperature sensor, and verifying the operation of the engine control module.

6. Is it possible to reset the OBDII code P1052 Cadillac fault code related to Reductant Heater 2 Driver High Temperature?

- While you can clear the fault code temporarily, it is crucial to address the underlying issue causing the error code to prevent it from reoccurring.

7. Are there any DIY tips for fixing the OBDII code P1052 Cadillac error associated with Reductant Heater 2 Driver High Temperature?

- DIY repairs may involve checking and replacing the reductant heater, inspecting the wiring for any visible damage, and ensuring proper connection of the temperature sensor.

8. How much does it typically cost to repair the OBDII code P1052 Cadillac issue related to Reductant Heater 2 Driver High Temperature?

- Repair costs can vary depending on the exact cause of the issue, but it may involve replacement of components such as the reductant heater, temperature sensor, or repair of wiring, costing a few hundred dollars to fix.

9. Will the OBDII code P1052 Cadillac problem affect my vehicle's fuel efficiency?

- If left unresolved, the issue could potentially impact fuel efficiency due to improper functioning of the emissions control system affected by the Reductant Heater 2 Driver High Temperature fault.

10. Can a mechanic easily fix the OBDII code P1052 Cadillac error linked to Reductant Heater 2 Driver High Temperature?

- A qualified mechanic with experience in diagnosing and repairing emission system issues should be able to address the P1052 fault code efficiently by following proper diagnostic procedures and making necessary repairs.

Discuss the causes and fixes for P1052 Cadillac OBDII Code

Code P1052 Cadillac comments

No comments found for this page.

AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play