This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP
P0674: P0674: Engine Control Module (ECM) Output Circuit Malfunction
on 2020 Chevrolet SILVERADO 1500 PICKUP
Important for 2020 Chevrolet SILVERADO 1500 PICKUP Owners
Before starting repairs, verify which engine your 2020 Chevrolet SILVERADO 1500 PICKUP has. Check your VIN or engine code to ensure you order the correct parts.
📖 What Does P0674 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?
Symptoms
- • Engine misfires
- • rough idle
- • decreased power
- • and decreased fuel efficiency
Common Causes
- • Faulty ECM output circuit
- • faulty wiring
- • or a blown fuse
How to Fix P0674 on 2020 Chevrolet SILVERADO 1500 PICKUP
1. Check the ECM output circuit for any signs of damage or corrosion. 2. Inspect the wiring and connectors for any signs of damage or corrosion. 3. Check the fuse box for any blown fuses. 4. If the issue persists, replace the ECM output circuit.
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Read & clear codes on your 2020 Chevrolet SILVERADO 1500 PICKUP
Shop Scanners ↗Related Diagnostic Codes
Other codes that may appear with P0674
P0672: Computer Output Circuit Malfunction
P0673: Computer Output Circuit Malfunction
P0675: Engine Control Module (ECM) Output Circuit Malfunction
P0676: Engine Control Module (ECM) Output Circuit Malfunction
💡 Why These Codes Are Related:
- • Similar Issues: Same root cause or component failure
- • Related Problems: Often occur together due to system interactions
- • Sequential Codes: Progressive failure stages or multiple sensors
- • Same System: Components within the same automotive system