What does GMC P1676 mean?

GMC code P1676: Driver 4 Line 6. It relates to the powertrain on GMC vehicles.

Can P1676 be turned off in the ECU?

DTC removal is possible for off-road/motorsport use after the underlying fault or hardware change (e.g. DPF/EGR removal). Safety-critical codes should be fixed, not suppressed.

Home › DTC Lookup › GMC › P1676

GMC • powertrain

GMC P1676

Driver 4 Line 6

What P1676 means on a GMC

On GMC vehicles, P1676 is logged when the ECU detects a fault in the powertrain: “Driver 4 Line 6”. P1676 is a manufacturer-specific GMC code (the "1" after the letter marks an OEM-defined code), so its meaning applies to GMC and may differ on other makes.

Common causes & symptoms

Typical triggers for a powertrain code like P1676 include faulty or ageing sensors, wiring/connector faults, a clogged or removed component, or a value drifting outside the ECU's expected window. Symptoms range from a check-engine light only, to limp mode, rough running, higher consumption or failed emissions tests.

P1676 and ECU tuning

When a GMC has had hardware changed for off-road/motorsport use (for example a removed DPF or EGR), the related monitor must be disabled in the ECU map or the code re-appears. Softechpro Solutions performs DPF/EGR/AdBlue/DTC off and recalculates the checksum, so codes like P1676 stay cleared after the flash. Genuine faults should always be repaired, not just hidden.

Related GMC codes

P1672 P1673 P1674 P1675 P1677 P1680 P1681 P1682

Need to clear P1676 after a delete?

Softechpro Solutions does DPF/EGR/AdBlue/DTC off + checksum for 260+ ECU families — from €98.99/mo.

See pricing Ask on WhatsApp

← All GMC codes • DTC lookup tool