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Engine-Codes – GMC – P216E GMC

P216E GMC Code - Cylinder 6 Injector High Control Circuit Low Voltage

Quick Answer

The P216E GMC code indicates a problem with the Cylinder 6 Injector High Control Circuit Low Voltage. Common causes include Faulty fuel injector: The injector in cylinder 6 may be malfunctioning or clogged, leading to low voltage, Wiring issues: A damaged or corroded wire in the control circuit can cause a low voltage condition, ECM malfunction: A problem with the engine control module can disrupt the injector's operation. 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
P216E GMC indicates Cylinder 6 Injector High Control Circuit Low Voltage.
Common causes
Common causes include Faulty fuel injector: The injector in cylinder 6 may be malfunctioning or clogged, leading to low voltage, Wiring issues: A damaged or corroded wire in the control circuit can cause a low voltage condition, ECM malfunction: A problem with the engine control module can disrupt the injector's operation.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code P216E GMC Description

The P216E GMC code indicates a problem with the Cylinder 6 Injector High Control Circuit Low Voltage. In simpler terms, this means that there is a low voltage condition detected in the control circuit for the fuel injector in cylinder 6 of the engine. The fuel injector is responsible for delivering the precise amount of fuel into the combustion chamber for proper engine operation. When the voltage in the control circuit is low, it can affect the injector's ability to function correctly, leading to poor engine performance.

OBDII Code P216E GMC - Cylinder 6 Injector High Control Circuit Low Voltage
P216E GMC Code - Cylinder 6 Injector High Control Circuit Low Voltage

Common Causes of P216E GMC

  1. Faulty fuel injector: The injector in cylinder 6 may be malfunctioning or clogged, leading to low voltage.
  2. Wiring issues: A damaged or corroded wire in the control circuit can cause a low voltage condition.
  3. ECM malfunction: A problem with the engine control module can disrupt the injector's operation.
  4. Poor connection: Loose or poor connections in the control circuit can result in low voltage to the injector.

Symptoms of P216E GMC

  1. Rough idle: The engine may run rough or unevenly at idle, causing vibrations and instability.
  2. Misfires: Cylinder 6 may experience misfires, leading to a loss of power and potential engine damage.
  3. Decreased fuel efficiency: The vehicle may consume more fuel than usual due to improper fuel injection.
  4. Engine stalling: In severe cases, the engine may stall unexpectedly, potentially leaving the driver stranded.

How to Fix P216E GMC

  1. Diagnose the issue: Use a diagnostic scanner to retrieve the trouble code and pinpoint the exact cause of the low voltage condition.
  2. Inspect wiring: Check the wiring harness for any damage, corrosion, or loose connections. Repair or replace as needed.
  3. Test fuel injector: Test the fuel injector in cylinder 6 to ensure it is functioning properly. Replace if faulty.
  4. Check ECM: Verify the engine control module's operation and reprogram or replace if necessary.
  5. Clear codes: Clear the trouble code from the ECM's memory and test drive the vehicle to confirm the issue has been resolved.

Cost to Fix P216E GMC

The cost of repairing a P216E GMC code can vary depending on the specific cause of the issue. In general, you can expect to pay between $150 to $500 for parts and labor. Keep in mind that labor rates at auto repair shops can vary, so it's advisable to obtain multiple quotes to ensure you get a fair price. Additionally, the cost may increase if additional components need to be replaced or if the ECM requires reprogramming.

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Information for Specific GMC Models

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 P216E GMC Code

1. What does the OBDII code P216E mean on a GMC vehicle?

P216E indicates that the powertrain control module (PCM) has detected a low voltage issue in the high control circuit for Cylinder 6's fuel injector.

2. What are the common symptoms of code P216E on a GMC?

Symptoms may include rough idling, misfires, reduced engine performance, poor fuel economy, and the check engine light being illuminated.

3. What causes the P216E code to appear on a GMC?

Possible causes include a faulty fuel injector, damaged wiring or connectors in the Cylinder 6 injector circuit, a malfunctioning PCM, or a blown fuse.

4. Can I drive my GMC with a P216E code?

While the vehicle may still run, driving with this code can cause further damage to the engine or catalytic converter. Addressing the issue promptly is recommended.

5. How is the P216E code diagnosed on a GMC?

A mechanic will use an OBDII scanner to confirm the code, inspect the wiring and connectors for Cylinder 6's injector, test the injector itself, and check for proper voltage and continuity in the circuit.

6. How do you fix the P216E code on a GMC?

Repairs may involve replacing the faulty fuel injector, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the PCM if necessary.

7. What tools are needed to diagnose and fix the P216E code?

Tools may include an OBDII scanner, a digital multimeter to test voltage and continuity, and possibly specialized tools for injector removal and installation.

8. Will resetting the check engine light fix the P216E code?

Simply resetting the light won’t fix the underlying issue. The cause of the low voltage in the Cylinder 6 injector circuit must be identified and repaired.

9. How much does it cost to repair a P216E code on a GMC?

Costs can vary depending on the specific repair, ranging from $100 for wiring repairs to $500 or more for injector replacement or PCM repair.

10. Can a dirty fuel injector cause the P216E code?

A dirty injector is unlikely to cause this code, as it specifically relates to an electrical issue. However, it’s important to rule out all potential causes during diagnosis.

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