Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2003 Chevrolet Chevy Express H2500FACTORY OEM SERVICE PROCEDURE
Instrument Panel DTCS
INSTRUMENT PANEL DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description |
|---|---|
| DTC B1372 | 75 Percent Or More Difference Between Ignition 1 Voltage Circuit And IPC Battery Voltage Circuit |
| DTC B2961 | Ignition 1 Input Is Active And The Key In Ignition Switch Signal Circuit Is Inactive |
| DTC P0461 | No Change In Fuel Level Over Distance |
| DTC P0462 | Fuel Level Signal Low |
| DTC P0463 | Fuel Level Signal High |
| DTC P0522 | EOP Sensor Signal Circuit Voltage Low |
| DTC P0523 | EOP Sensor Signal Circuit Voltage High |
| DTC P1431 | No Change In Secondary Fuel Level |
| DTC P1432 | Secondary Fuel Level Signal Voltage Low |
| DTC P1433 | Secondary Fuel Level Signal Voltage High |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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