Mega Track C1946 Engine Trouble Code
What is Mega Track C1946?
When Mega Track C1946 code appears, first check your gas cap. Pull over safely, ensure it is tight, and inspect for cracks. A loose or damaged gas cap affects fuel-system pressure and emissions. A replacement cap costs about $3–$10. This simple fix can resolve the code and improve fuel economy.
C1946 on the Mega Track
The Mega Track has a known weak point in the lambda sensor wiring loom where it passes through the floor pan grommet. Road salt and vibration cause the insulation to crack at this point, creating an intermittent open circuit that stores C1946 without a consistent symptom.
Code Information
| Code Type: | OBD-II Chassis (C) Trouble Code |
| System: | Chassis |
| Vehicle: | Mega Track |
| Brand: | Mega |
| Model: | Track |
| Code: | C1946 |
C1946 Mega Track Symptoms
Check Engine Light
Illuminated Mega Track dashboard warning
Engine Stalling
Engine stops unexpectedly or misfires
Performance Issues
Reduced power or acceleration on the Mega Track
Starting Problems
Difficulty starting the engine
Poor Fuel Economy
Increased fuel consumption on the Mega Track
Increased Emissions
Failed emissions test due to C1946
C1946 Code Structure
Understanding what each digit means in the C1946 chassis trouble code:
| C | 1 | 9 | 4 | 6 |
|---|---|---|---|---|
| Chassis Code | Fuel And Air Metering | Injector Circuit Malfunction - Cylinders | Injection Pump Fuel Metering Control 'B' High | Ignition Coil A Primary/Secondary Circuit Malfunction |
How to Fix Mega Track C1946
Diagnostic Steps:
Oxygen sensors measure exhaust gas oxygen content to optimise air-fuel ratio. This optimisation improves fuel economy and reduces emissions. Sensors degrade over time and require periodic replacement.
Repair Solution:
Gasoline engines use spark plugs to ignite fuel-air mixture. Proper timing ensures the explosion occurs when the piston is positioned correctly. Incorrect plug wire sequencing causes mistimed ignition, resulting in poor performance.
Technical Notes:
C1946 DTC specifically relates to camshaft timing. When cam timing is over-retarded, the check-engine light illuminates and this code sets. Verify VCT solenoid operation and check for contamination.
Mega Track C1946 Repair Cost
A Mega Track C1946 fault caused by ignition coil failure costs roughly $90–$160 per coil including labour. Replacing all coils simultaneously — rather than one at a time — is recommended because coils typically age at similar rates. This preventive approach keeps total cost below $500.
C1946 Description
C1946 engine trouble code is related to Ignition Coil A Primary/Secondary Circuit Malfunction.
Main Cause
The primary reason for C1946 OBD-II Engine Trouble Code is: Injector Circuit Malfunction - Cylinders.
Common C1946 Misdiagnosis on the Mega Track
On the Mega Track, the VANOS (variable camshaft timing) solenoid is routinely replaced for C1946 when the actual issue is oil pressure insufficiency. No solenoid will operate correctly if the oil pressure required to actuate the VVT phaser is not present.
DIY Repair Guide: C1946 on Mega Track
Clearing C1946 on your Mega Track with a basic OBD-II reader ($20–$40) is straightforward: plug the reader into the diagnostic port under the dashboard, read the stored code, and clear it. If it returns within one drive cycle, the underlying fault is still present and requires attention.
Preventing C1946 on the Mega Track
The Mega Track benefits from an intake manifold decarbonisation at 50,000-mile intervals when direct injection is fitted. Carbon build-up on intake valve stems restricts airflow and creates the lean conditions that trigger C1946.
Frequently Asked Questions — Mega Track C1946
A: If your Mega Track is within the factory powertrain warranty period (typically 3–5 years or 60,000–100,000 miles depending on region and generation), C1946 repairs caused by component defects should be covered. Bring your service history to the dealer appointment.