AutoCodes – Cadillac – P103F Cadillac

P103F Cadillac Code - Reductant Pump Driver High Temperature

Quick Answer

The selective catalytic reduction system reduces Oxides of Nitrogen (NOx) emissions by injecting a metered amount of reductant into the exhaust gas stream entering the selective catalytic reduction catalyst. Common causes include Faulty Reductant Pump and Sensor Assembly, Reductant Pump and Sensor Assembly harness is open or shorted, Reductant Pump and Sensor Assembly 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
P103F Cadillac indicates Reductant Pump Driver High Temperature.
Common causes
Common causes include Faulty Reductant Pump and Sensor Assembly, Reductant Pump and Sensor Assembly harness is open or shorted, Reductant Pump and Sensor Assembly 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 344
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jul 24, 2021
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Code P103F Cadillac Description

The selective catalytic reduction system reduces Oxides of Nitrogen (NOx) emissions by injecting a metered amount of reductant into the exhaust gas stream entering the selective catalytic reduction catalyst. Within the selective catalytic reduction catalyst, the reductant reacts with the NOx to form nitrogen, carbon dioxide, and water vapor. Upstream and downstream NOx sensors provide the engine control module and the reductant control module via serial data. The Engine Control Module (ECM) controls the reductant injector duty cycle in response to changes in engine-out NOx levels. The reductant control module supplies system voltage to the reductant pump motor. The reductant control module controls the solenoid by grounding the control circuit. The reductant control module can determine if the control circuit is open, shorted to ground, or shorted to a voltage by monitoring the feedback voltage. The Diagnostic Trouble Code (DTC) will be set when the reductant control module detects a motor pump driver high temperature.
OBDII Code P103F Cadillac - Reductant Pump Driver High Temperature - AutoCodes.com
P103F Cadillac Code - Reductant Pump Driver High Temperature

What are the Possible Causes of the DTC P103F Cadillac?

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

How to Fix the DTC P103F 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 P103F 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.

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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 P103F Cadillac Code

1. What are the common symptoms of OBDII code P103F in a Cadillac related to the Reductant Pump Driver High Temperature?

- Common symptoms include the check engine light illuminating, reduced engine performance, and potential hard starting or stalling issues.

2. What are the possible causes of the OBDII code P103F in a Cadillac indicating a Reductant Pump Driver High Temperature fault?

- Possible causes include a malfunctioning reductant pump, wiring issues, a faulty reductant pump driver module, or a software glitch in the engine control module.

3. How can I diagnose the OBDII code P103F in my Cadillac related to the Reductant Pump Driver High Temperature?

- Diagnosis typically involves using an OBDII scanner to retrieve the specific fault code, checking the reductant pump and associated wiring for any visible damage or defects, and testing the reductant pump driver module.

4. Are there any quick repair tips for resolving the OBDII code P103F indicating a Reductant Pump Driver High Temperature issue in my Cadillac?

- Quick repair tips may include checking and repairing any damaged wiring, ensuring proper reductant pump operation, and resetting the fault code to see if it returns.

5. Can driving with the OBDII code P103F related to the Reductant Pump Driver High Temperature fault harm my Cadillac?

- Continuously driving with this fault can potentially lead to increased emissions, reduced fuel efficiency, and further damage to the emissions control system over time.

6. How much does it typically cost to repair the OBDII code P103F in a Cadillac due to a Reductant Pump Driver High Temperature issue?

- Repair costs can vary depending on the exact cause of the fault, but they may range from a few hundred to over a thousand dollars, including parts and labor.

7. Is it safe to continue driving my Cadillac with the OBDII code P103F related to the Reductant Pump Driver High Temperature fault?

- It is generally not recommended to drive the vehicle extensively with this fault present, as it can lead to potential performance issues and increased emissions.

8. Can I reset the OBDII code P103F in my Cadillac indicating a Reductant Pump Driver High Temperature problem myself?

- You can attempt to clear the fault code with an OBDII scanner, but it is important to address the underlying issue causing the fault to prevent it from recurring.

9. What is the purpose of the reductant pump in a Cadillac, and how does it relate to the OBDII code P103F?

- The reductant pump is responsible for delivering the diesel exhaust fluid (DEF) to the exhaust system to reduce emissions. The P103F code indicates a high-temperature issue related to this pump.

10. How long does it typically take to repair the OBDII code P103F associated with the Reductant Pump Driver High Temperature in a Cadillac?

- Repair times can vary depending on the exact cause of the fault and the availability of parts. In general, it may take a few hours to a day for diagnosis and repair.

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