AutoCodes – Cadillac – P208A Cadillac

P208A Cadillac Code - Reductant Pump Control Circuit

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: P208A Cadillac indicates Reductant Pump Control Circuit.
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 464

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 26, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P208A 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 (ECM) and the Reductant Control Module via serial data. The Reductant Control Module varies the amount of reductant added by varying 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 an open circuit in the control circuit.

OBDII Code P208A Cadillac - Reductant Pump Control Circuit - AutoCodes.com — P208A Cadillac Code - Reductant Pump Control Circuit

What does this mean?

What are the Possible Causes of the DTC P208A 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 P208A 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 P208A 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 P208A Cadillac Code

1. What does the OBDII code P208A mean on a Cadillac?

P208A indicates an issue with the reductant pump control circuit, which is part of the diesel exhaust fluid (DEF) system used for emissions control.

2. What are the symptoms of code P208A in a Cadillac?

Common symptoms include the check engine light turning on, DEF system warnings, reduced engine power, or failure to meet emissions standards.

3. What causes the P208A code to appear?

Possible causes include a faulty reductant pump, electrical issues such as damaged wiring or connectors, a blown fuse, or a malfunctioning control module.

4. Can I drive my Cadillac with the P208A code?

Driving with this code is not recommended, as it can lead to increased emissions, engine performance issues, or even the vehicle entering a reduced-power mode.

5. How do I diagnose the P208A code on a Cadillac?

Start by using an OBDII scanner to confirm the code, then inspect the reductant pump, wiring, connectors, and control circuit for damage or faults.

6. How do I fix the P208A code on my Cadillac?

Repairs may involve replacing the reductant pump, repairing damaged wiring or connectors, replacing the fuse, or reprogramming/repairing the control module.

7. Is the P208A code covered under warranty for my Cadillac?

This depends on the vehicle's warranty terms. Emissions-related components may be covered under federal or manufacturer-specific emissions warranties.

8. What tools are needed to fix a P208A code?

Tools may include an OBDII scanner, a multimeter for electrical testing, and basic hand tools for inspecting and replacing components.

9. How much does it cost to repair a P208A code on a Cadillac?

Repair costs vary, but replacing a reductant pump can range from $500 to $1,200, while electrical repairs may cost less depending on the issue.

10. Can a software update fix the P208A code on a Cadillac?

In some cases, a software update or reprogramming of the control module may resolve the issue if it is caused by a software glitch.

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