AutoCodes – Generic – P1670

P1670 Code - Electronic Feedback Signal Not Detected

Quick Answer

The Injector Driver Module (IDM) provides the EF output signal to the Powertrain Control Module (PCM) to confirm that proper timing/duration of Fuel Delivery Command Signal (FDCS) was received. Common causes include Open fuse, Faulty Injector Driver Module (IDM) relay, Open or shorted Injector Driver Module (IDM) enable circuit. 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: P1670 indicates Electronic Feedback Signal Not Detected.
Common causes: Common causes include Open fuse, Faulty Injector Driver Module (IDM) relay, Open or shorted Injector Driver Module (IDM) enable circuit.
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 45,762

How popular is this code, among other codes? Medium

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 Sep 08, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1670 Description

OBDII Code P1670 - Electronic Feedback Signal Not Detected - AutoCodes.com — P1670 Code - Electronic Feedback Signal Not Detected

What does this mean?

What are the Possible Causes of the DTC P1670?

Open fuse
Faulty Injector Driver Module (IDM) relay
Open or shorted Injector Driver Module (IDM) enable circuit
Open/short in EF circuit
Open/short in Fuel Delivery Command Signal (FDCS) circuit
Injector Driver Module (IDM) powering circuits
Faulty Powertrain Control Module (PCM)

How to Fix the DTC P1670?

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 P1670 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 P1670 code?

Need more information on how to fix the P1670 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1670 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1670 Buick — Quad Driver Module 'C' Fault Detected Conditions
P1670 Cadillac — Quad Driver Module 'C' Fault Detected Conditions
P1670 Chevrolet — Quad Driver Module 'C' Fault Detected Conditions
P1670 Ford — Electronic Feedback Signal Not Detected
P1670 GMC — Quad Driver Module 'C' Fault Detected Conditions
P1670 Hyundai — Ignition Power Stage B Circuit Malfunction
P1670 Land Rover — Engine Control Module Cooling Fan Circuit Low
P1670 Saab — Throttle Actuator Limp Home Relay Open Circuit / Short To Ground
P1670 Volvo — Immobilizer Communication

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 P1670 Code

1. What are the common symptoms of OBDII code P1670 (Electronic Feedback Signal Not Detected)?

- Common symptoms include issues with the vehicle's transmission, such as rough shifting, hesitation, or stalling.

2. What are the possible causes of OBDII code P1670?

- The code P1670 can be triggered by issues with the transmission control module (TCM), faulty wiring, or a malfunctioning electronic feedback sensor.

3. How can I diagnose the cause of OBDII code P1670?

- Diagnosis typically involves using a scan tool to retrieve the code, inspecting the wiring and connectors related to the electronic feedback sensor, and testing the sensor's functionality.

4. Can I still drive my vehicle with OBDII code P1670?

- It is not recommended to drive the vehicle with this code present, as it can lead to further damage to the transmission or other components.

5. How can I repair OBDII code P1670?

- Repair options may include replacing the electronic feedback sensor, repairing or replacing damaged wiring, or reprogramming the TCM.

6. Is it safe to clear the OBDII code P1670 without addressing the underlying issue?

- Clearing the code without fixing the root cause can lead to the problem recurring and potential damage to the transmission. It is best to address the issue promptly.

7. Can a DIY enthusiast fix OBDII code P1670 at home?

- While some simple repairs like checking wiring connections can be done at home, diagnosing and repairing more complex issues may require professional assistance.

8. How much does it typically cost to repair OBDII code P1670?

- The cost of repairs for this code can vary depending on the root cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

9. Can a faulty battery cause OBDII code P1670 to appear?

- Yes, a weak or faulty battery can sometimes cause communication issues between the electronic feedback sensor and the TCM, triggering the P1670 code.

10. How can I prevent OBDII code P1670 from reoccurring in the future?

- Regular maintenance, including checking the transmission system and related components, can help prevent the recurrence of OBDII code P1670.