The B1473 OBD2 fault code relates to the Ignition Cylinder Sensor Short To Ground circuit. When the circuit circuit failure, the module cannot properly monitor or control this body system.
At AIscanAuto, we help drivers quickly identify OBD2 trouble codes, understand their root causes, and find the right fix.
Symptoms
- Starting difficulties
- Tachometer erratic or not working
- Dashboard warning lights
- Possible stalling
Common Causes
- Faulty component — internal damage or wear affecting Ignition Cylinder Sensor Short To Ground
- Wiring issues — broken, corroded, or chafed wires in the circuit
- Connector problems — loose, oxidized, or moisture-damaged pins
- a general circuit failure is detected — can result from wiring faults, connector issues, or component failure
- Module input failure — rare, but the control module input stage may be defective
Step-by-Step Diagnosis
- Scan with OBD2 tool — Confirm B1473 is active. Check for additional DTCs.
- Visual inspection — Examine the Ignition Cylinder Sensor Short To Ground wiring and connector for corrosion or damage.
- Check voltage and ground — Use a multimeter to verify proper reference voltage.
- Test component — Compare readings to factory specs. A stuck or erratic signal confirms failure.
- Check for shorts/opens — Perform continuity tests on the wiring between the component and control module.
Repair & Solutions
- If the component is defective, replace the Ignition Cylinder Sensor Short To Ground with an OEM or quality aftermarket part.
- Repair any damaged wiring or connectors using proper methods.
- Clear the DTC with an OBD2 scanner and test drive to verify the code does not return.
- If the code persists after component replacement, inspect the control module connector.
Related Codes
- B1470 — Ignition Cylinder Sensor Circuit Failure
- B1471 — Ignition Cylinder Sensor Open Circuit
- B1472 — Ignition Cylinder Sensor Short To Battery