Code Definition

P1882 — Engine Coolant Level Switch Circuit Short to Ground

System: Powertrain  |  Type: Manufacturer-Specific  |  Make: Generic

About P1882

P1882 is a manufacturer-specific powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P1882 is stored, the module has detected a short-circuit (voltage pulled to ground or to supply) in the monitored circuit.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

P1882 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

This DTC is specific to a short to ground in the engine coolant level switch circuit monitored by the Generic Electronic Module (GEM). The coolant level switch is typically monitored on a signal circuit that changes state with coolant level. DTC P1882 sets when the control circuit is grounded at a time it should not be, which the GEM interprets as a fault. This prevents accurate detection of the coolant level and can trigger a false low coolant warning or suppress a genuine one.

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