[SOLVED] Hummer P1682 Code: Fast Fix For Ignition Switch Circuit

The OBD code P1682 for a Hummer indicates a problem with the ignition switch circuit.

This affects the starting of the engine, leading to the Engine Light being ON and the engine not cranking or starting.

The issue is commonly caused by a faulty ignition switch, open/shorted harness, poor electrical connection, or a faulty Engine Control Module (ECM).

It is a serious problem that requires immediate attention.

To fix it, inspect the ignition switch circuit components, wiring harness, and connectors for any damage or poor connections.

Repair Importance Level	10.0 (Out of 10)
Estimated Repair Time	Approximately 1.0 hour
Repair Difficulty Level	6.67 (Out of 10)

Symptoms of the Hummer p1682 OBD Code

The vehicle may experience issues related to the ignition switch circuit malfunction indicated by code P1682.

Symptoms: Engine Light ON.
No Engine Crank or Start.

Causes of the Hummer p1682 OBD Code

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P1682 in a Hummer indicates a possible issue with the ignition switch circuit.

P1682 can be caused by a faulty ignition switch.
An open or shorted ignition switch harness.
A poor electrical connection in the ignition switch circuit.
A faulty Engine Control Module (ECM).

Fixing Hummer Error Code p1682 Step By Step

Address the issue by inspecting the ignition switch circuit for potential faults or damage.

To fix the Hummer OBDII code P1682, start by reviewing the possible causes mentioned above.
Visually examine the wiring harness and connectors related to the ignition switch circuit.
Check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
If any issues are found during the inspection, repair or replace the damaged wiring or connectors as necessary.
Clear the fault code from the vehicle’s computer using a scan tool.
Test drive the vehicle to ensure the code does not return, indicating a successful repair.

Cost Of Fixing Hummer p1682 Fault Code

The repair for Hummer fault code P1682 may involve diagnosing and fixing issues with the ignition switch circuit.

The cost to diagnose and fix a Hummer OBD code P1682 depends on the estimated 1. 0hour repair time.

Labor rates usually range from $75 to $150 per hour, so the general cost could be between $75 and $150. Actual cost may vary based on shop rates and the complexity of the repair.

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Details of the Hummer p1682 OBD Code

P1682 in a Hummer indicates a low ignition voltage condition detected by the ECM.

OBD code P1682 for a Hummer indicates that there is a communication error between the engine control module (ECM) and the body control module (BCM).

This code is triggered when the ECM detects a discrepancy in the serial data communication between these two modules.

The signal or system involved in this case is the data bus communication network within the vehicle, which allows different modules to communicate with each other.

Mechanic’s Tech Notes

P1682 code indicates that there is a low voltage condition detected on the ignition 1 switch circuit.

OBDII code P1682 in a Hummer indicates a communication issue between the engine control module (ECM) and the transmission control module (TCM).

To diagnose, check TCM power and ground using a multimeter.

Use a scan tool to confirm TCM response over the Controller Area Network (CAN) network.

Visually inspect wiring harnesses and connectors for damage, focusing on pin connections for signs of corrosion or damage.

Reflashing the TCM may be necessary to resolve the communication problem.

FAQ

1. What does OBD code P1682 mean in a Hummer vehicle?

OBD code P1682 in a Hummer indicates a problem with the ignition switch circuit. Check for faulty ignition switch, harness issues, or ECM problems.

2. What are the common causes of OBD code P1682 in a Hummer?

Common causes of OBD code P1682 in a Hummer include a faulty ignition switch, open/shorted harness, poor electrical connection, or faulty ECM. Inspect and repair wiring/connectors.

3. How can I diagnose and fix OBD code P1682 in my Hummer vehicle?

Diagnose P1682 in a Hummer for Engine Light ON, No Crank/Start. Check ignition switch, harness, ECM. Inspect wiring, connectors for damage, corrosion.

Wrap Up

If your Hummer is displaying OBD code P1682 and experiencing issues with starting or running, it could be caused by a faulty ignition switch, damaged wiring in the ignition switch circuit, or a poor electrical connection in the system.

These issues can lead to intermittent starting problems or stalling while driving.

To address Hummer OBD code P1682, start by inspecting the ignition switch and its wiring for any signs of wear, damage, or loose connections.

Test the electrical connections for proper voltage and continuity.

Replace the ignition switch if necessary and repair any damaged wiring in the circuit to ensure