P2478
Exhaust Gas Temperature Out of Range Bank 1 Sensor 1
DTC P2478, sometimes indicated as P247800 is an OBD diagnostic trouble code indicating a manufacturer-specific fault with the vehicle powertrain (i.e. engine and gearbox). This code identifies an error with the auxiliary emissions system causing exhaust gas temperature out of range bank 1 sensor 1.
The exhaust gas temperature sensor measures the temperature of the exhaust gases as they leave the engine. The DTC P2478 code is set when the exhaust gas temperature is out of the normal range.
There are several possible causes of this code, including a defective exhaust gas temperature sensor, a clogged exhaust system, or a faulty engine control module.
If the exhaust gas temperature sensor is defective, it needs to be replaced. If the exhaust system is clogged, it needs to be cleaned. If the engine control module is faulty, it needs to be replaced.
- P2478: Gas Temperature Out of Range Bank 1 Sensor 1
- P2478: Exhaust Gas Temperature Out of Range Bank 1 Sensor 1
- P2478: Exhaust Gas Temperature Out of Range Bank 1 Sensor 1
- P2478: Exhaust Gas Temperature Out of Range
- P2478: Exhaust gas temperature sensor 1, bank 1 – out of range
- P2478 00: Exhaust gas temperature sensor 1, bank 1 - out of range
Bulletins are notices put out by manufacturers in conjunction with the NHTSA to notify the public of manufacturing issues or changes.
- TB011303 - ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM)
VOLKSWAGEN: Update programming mil on, dtcs P050E, P2080, P244C and/or P2478 stored in ecm fault memory - V011228 2030453 - ENGINE (PWS)
VOLKSWAGEN: Technical bulletin (update programming for stored in ecm fault memory issues): the mil on with nox sensor fault P2201 and/or exhaust gas temperature sensor faults P050E, P2080, P244C and/or P2478 stored in fault memory due to the diagnos - V011228 2030453 - ELECTRICAL SYSTEM:SOFTWARE
VOLKSWAGEN: Technical bulletin (update programming for stored in ecm fault memory issues): the mil on with nox sensor fault P2201 and/or exhaust gas temperature sensor faults P050E, P2080, P244C and/or P2478 stored in fault memory due to the diagnos