AutoCodes – Generic – P214F

P214F Code - Reductant Heater 1 Current Too High

Quick Answer

The Selective Catalyst Reduction (SCR) system reduces Oxides of Nitrogen (NOx) emissions by injecting a metered amount of Diesel Exhaust Fluid (DEF) or reductant into the exhaust gas stream entering the SCR catalyst. Common causes include Faulty Reductant Heater 1, Reductant Heater 1 harness is open or shorted, Reductant Heater 1 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: P214F indicates Reductant Heater 1 Current Too High.
Common causes: Common causes include Faulty Reductant Heater 1, Reductant Heater 1 harness is open or shorted, Reductant Heater 1 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 509

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Sep 10, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P214F Description

The Selective Catalyst Reduction (SCR) system reduces Oxides of Nitrogen (NOx) emissions by injecting a metered amount of Diesel Exhaust Fluid (DEF) or reductant into the exhaust gas stream entering the SCR catalyst. Within the SCR 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) with engine-out and tailpipe-out NOx levels in Parts Per Million (ppm). The ECM then adjusts the amount of reductant injected upstream of the SCR based on the NOx concentration. Engine-out NOx levels as measured by NOx Sensor 1 will either increase (high ppm) or decrease (low ppm) the amount of reductant injected. The NOx concentration as measured by NOx Sensor 2 provides the ECM with both an indication of the NOx conversion efficiency within the SCR as well as confirming the proper operation of the reductant system. The Diagnostic Trouble Code (DTC) will be set when the Glow Plug Control Module (GPCM) detects a heater short circuit by detecting a high current in the heater.

OBDII Code P214F - Reductant Heater 1 Current Too High - AutoCodes.com — P214F Code - Reductant Heater 1 Current Too High

What does this mean?

What are the Possible Causes of the DTC P214F?

Faulty Reductant Heater 1
Reductant Heater 1 harness is open or shorted
Reductant Heater 1 circuit poor electrical connection
Faulty Glow Plug Control Module (GPCM)

How to Fix the DTC P214F?

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 P214F 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 P214F code?

Need more information on how to fix the P214F code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P214F code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P214F Chevrolet — Reductant Heater 1 Current Too High
P214F GMC — Reductant Heater 1 Current Too High

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 P214F Code

1. What does the OBDII code P214F mean?

P214F indicates that the current in the reductant heater circuit 1 is too high, which may point to an electrical issue or a short in the heater system for the diesel exhaust fluid (DEF).

2. What are the common symptoms of the P214F code?

Symptoms may include a check engine light, DEF system warnings, poor engine performance, or the vehicle entering limp mode.

3. What causes the P214F code to appear?

Common causes include a faulty reductant heater, damaged wiring, a short circuit, or a malfunctioning control module.

4. Can I still drive my vehicle with a P214F code?

While the vehicle may still run, driving with this code can lead to DEF system failure or restricted performance, especially in diesel engines that rely on emissions control.

5. How do I diagnose the P214F code?

Diagnosis involves checking the reductant heater circuit for damage, inspecting wiring and connectors, and testing the heater's resistance and current draw.

6. How is the P214F code typically repaired?

Repairs may include replacing the reductant heater, repairing damaged wiring, cleaning connectors, or reprogramming/replacing the control module if faulty.

7. What tools are needed to troubleshoot the P214F code?

Youâ€™ll need an OBDII scanner, a multimeter for testing resistance and current, and possibly a wiring diagram for the reductant heater circuit.

8. How much does it cost to fix the P214F code?

The repair cost can range from $200 to $1,000 depending on whether the issue is a simple wiring fix or a replacement of the reductant heater or control module.

9. Can a software update fix the P214F code?

In some cases, a software update to the control module may resolve the issue if itâ€™s related to incorrect threshold settings or communication problems.

10. What happens if the P214F code is ignored?

Ignoring this code may lead to DEF system failure, increased emissions, reduced fuel efficiency, or the engine entering limp mode, limiting performance.