What does code P1458 mean?

Q: What does code P1458 mean?

Exhaust Gas Temperature Sensor 2 Short To Ground. P1458 on a Volkswagen means the engine control module has detected a short to ground on the signal circuit for exhaust gas temperature sensor 2, which is the sensor monitoring the downstream side of the emissions system. The computer expects a specific voltage range from the sensor and instead sees a signal pulled near zero volts, so it flags the circuit as faulty and may limit certain emissions control strategies.

DTC codes / Volkswagen codes / P1458

P1458 · VolkswagenExhaust Gas Temperature Sensor 2 Short To Ground

P1458 on a Volkswagen means the engine control module has detected a short to ground on the signal circuit for exhaust gas temperature sensor 2, which is the sensor monitoring the downstream side of the emissions system. The computer expects a specific voltage range from the sensor and instead sees a signal pulled near zero volts, so it flags the circuit as faulty and may limit certain emissions control strategies.

SystemPowertrain

Code typeVolkswagen specific

SeverityMedium

Fix difficultyIntermediate

AreaAuxiliary emission controls

Guidance is general and written for Volkswagen vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.