AutoCodes – GMC – P2690 GMC

P2690 GMC Code - Cylinder 5 Injector Data Incompatible

Quick Answer

The control functions for the fuel injection system are integrated into the Engine Control Module (ECM). Common causes include Program Injector, Faulty Engine Control Module (ECM). 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: P2690 GMC indicates Cylinder 5 Injector Data Incompatible.
Common causes: Common causes include Program Injector, Faulty Engine Control Module (ECM).
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 1,441

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 Aug 01, 2021

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P2690 GMC Description

The control functions for the fuel injection system are integrated into the Engine Control Module (ECM). Each injector's flow rate information and cylinder position are stored in the memory of both the Glow Plug Control Module (GPCM) and the ECM. The fuel injector flow rate programming must be done when any of the following procedures are performed: The ECM is replaced, the GPCM is replaced, or any fuel injectors are replaced.
If the ECM does not communicate, the flow rate information can be retrieved from the GPCM. If both control modules fail to communicate, the fuel injector flow rate information, or Injection Quantity Adjustment (IQA) flow rate numbers, will need to be retrieved from each injector. The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the end of line injector adjustment code for cylinder 1 to 8 has not been programmed successfully after injector replacement.

OBDII Code P2690 GMC - Cylinder 5 Injector Data Incompatible - AutoCodes.com — P2690 GMC Code - Cylinder 5 Injector Data Incompatible

What does this mean?

What are the Possible Causes of the DTC P2690 GMC?

Program Injector
Faulty Engine Control Module (ECM)

How to Fix the DTC P2690 GMC?

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 does this mean?

Code Tech Notes

Programming Injector must perform with an OBDII scanner capable of programming injectors.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2690 GMC 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 P2690 GMC Code

1. What are the common symptoms of OBDII code P2690 GMC (Cylinder 5 Injector Data Incompatible)?

- Common symptoms include rough engine idle, misfires, decreased fuel efficiency, and potential engine stalling.

2. What are the possible causes of OBDII code P2690 GMC?

- The code may be triggered by issues such as a faulty fuel injector, wiring problems, software issues, or a problem with the Engine Control Module (ECM).

3. How can I diagnose the cause of OBDII code P2690 GMC?

- Diagnosis typically involves conducting a thorough inspection of the fuel injector for cylinder 5, checking the related wiring harness, and using a diagnostic scanner to gather data from the ECM.

4. What are some repair tips for addressing OBDII code P2690 GMC?

- Repair tips may include inspecting and possibly replacing the fuel injector for cylinder 5, repairing any damaged wiring, updating the ECM software, or resetting the fault code after repairs are made.

5. Can driving with OBDII code P2690 GMC cause further damage to my vehicle?

- Continuing to drive with this code present can potentially cause damage to the catalytic converter, oxygen sensors, and other engine components if left unresolved for an extended period.

6. How urgent is it to address OBDII code P2690 GMC?

- It is recommended to address this code promptly to prevent potential engine performance issues, increased emissions, and further damage to engine components.

7. Is it possible to clear OBDII code P2690 GMC without fixing the underlying issue?

- While it is possible to clear the code temporarily, the underlying problem should be diagnosed and repaired to prevent the code from reoccurring and to ensure proper engine performance.

8. Can a DIY enthusiast repair OBDII code P2690 GMC, or is professional assistance recommended?

- Depending on the individual's experience and knowledge, some DIY enthusiasts may be able to diagnose and repair the issue themselves. However, professional assistance is recommended for those unfamiliar with automotive diagnostics and repairs.

9. Are there any recalls or technical service bulletins related to OBDII code P2690 GMC?

- It is advisable to check with the manufacturer or authorized service center for any recalls or technical service bulletins related to this specific OBDII code to see if there are known issues or remedies available.

10. How can I prevent OBDII code P2690 GMC from occurring in the future?

- Regular maintenance, such as fuel system cleaning, using quality fuel, and addressing any engine performance issues promptly, can help prevent the occurrence of OBDII code P2690 GMC.