Ignition 1 Switch Circuit 2 (Driver 5 Line 2)
2004-2007 Buick Rainier 4.2L I6
Description
The PCM detected a voltage difference exceeding the maximum allowable threshold between the two circuits that supply it with battery voltage. This code is commonly caused by a failing ignition switch, which is a known issue on Trailblazer, Envoy, and SSR models among others.
Symptoms
- Check Engine Light
- Intermittent stalling
- Reduced Engine Power message
- Multiple warning lights
- Electrical accessories cutting out
- Intermittent no-start
Common Causes
- Failed or failing ignition switch (most common)
- Defective fuse or fuse box
- Loose PCM power connector
- Corroded ignition switch connector
- Damaged wiring in ignition circuit
Diagnostic Steps
- Test voltage at both PCM power supply circuits
- Compare voltage between the two circuits
- Inspect ignition switch connector
- Test ignition switch output under load
- Check all related fuses
Repair Notes
Replace ignition switch (most common fix). Check fuses and connectors. This is a known issue on many GM trucks and SUVs, particularly Trailblazer, Envoy, and SSR.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P1682 on Other Vehicles
Common Questions
What does code P1682 mean on a 2004-2007 Buick Rainier?
P1682 stands for "Ignition 1 Switch Circuit 2 (Driver 5 Line 2)". The PCM detected a voltage difference exceeding the maximum allowable threshold between the two circuits that supply it with battery voltage. This code is commonly caused by a failing ignition switch, which is a known issue on Trailblazer, Envoy, and SSR models among others.
What are the symptoms of P1682 on a Buick Rainier?
Common symptoms of P1682 include: Check Engine Light, Intermittent stalling, Reduced Engine Power message, Multiple warning lights, Electrical accessories cutting out, Intermittent no-start.
What causes P1682 on a 2004-2007 Buick Rainier?
Common causes of P1682 include: Failed or failing ignition switch (most common), Defective fuse or fuse box, Loose PCM power connector, Corroded ignition switch connector, Damaged wiring in ignition circuit.