P1670 Buick Code - Quad Driver Module 'C' Fault Detected Conditions
Quick Answer
With the key on, the Powertrain Control Module (PCM) detects an open, short-to-ground or short-to-voltage on the QDM 'C' fault line (to the Air pump relay or Air pump solenoid), condition met for 20 seconds. Common causes include Faulty Quad Driver Module, Quad Driver Module harness is open or shorted, Quad Driver Module 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
- P1670 Buick indicates Quad Driver Module 'C' Fault Detected Conditions.
- Common causes
- Common causes include Faulty Quad Driver Module, Quad Driver Module harness is open or shorted, Quad Driver Module 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.
Code P1670 Buick Description
What are the Possible Causes of the DTC P1670 Buick?
- Faulty Quad Driver Module
- Quad Driver Module harness is open or shorted
- Quad Driver Module circuit poor electrical connection
How to Fix the DTC P1670 Buick?
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 Buick 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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Frequently Asked Questions about P1670 Buick Code
What does the OBDII code P1670 on a Buick mean?
The P1670 code indicates a fault with Quad Driver Module 'C,' which manages specific electrical circuits in the vehicle's engine control system.
What are the symptoms of a P1670 code in a Buick?
Symptoms may include the check engine light turning on, poor engine performance, erratic idle, stalling, or issues with certain electrical components like the cooling fan or fuel injectors.
What causes the P1670 code to appear on a Buick?
Common causes include a faulty quad driver module, shorted or open circuits, damaged wiring, a defective ECU, or malfunctioning components controlled by the module.
How can I diagnose the P1670 code on my Buick?
Start by scanning the vehicle with an OBDII scanner, inspecting the wiring and connectors for damage, testing the quad driver module, and checking the components it controls for faults.
Can a bad quad driver module cause other issues in the car?
Yes, a malfunctioning quad driver module can disrupt the operation of multiple systems, such as fuel injectors, cooling fans, or solenoids, leading to broader engine performance problems.
Is it safe to drive a Buick with the P1670 code?
While the car may still be drivable, ignoring the issue can lead to worse performance, potential stalling, or further damage to the electrical system.
How do I fix the P1670 code on a Buick?
Repairs may involve replacing the faulty quad driver module, repairing damaged wiring, replacing defective components it controls, or reprogramming the ECU if needed.
Can the P1670 code be caused by a blown fuse?
Yes, a blown fuse linked to the circuits managed by the quad driver module can trigger the P1670 code.
What tools are needed to troubleshoot the P1670 code in a Buick?
You’ll need an OBDII scanner, a multimeter for testing circuits, and possibly a wiring diagram for your specific Buick model.
How much does it cost to fix a P1670 code on a Buick?
The cost varies depending on the root cause but typically ranges from $100 to $500, including diagnostics, parts, and labor.
Discuss the causes and fixes for P1670 Buick OBDII Code
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