P0421 Hino. false p0421/ reoccurring p0421 Hino Truck Forum Diagnosis: This trouble code may not have any effect on the driveability of the vehicle, but if left unresolved for a long. Check that the exhaust pipe has no looseness of flange or pipe breakage
P0421 Warm Up Catalyst Efficiency Below Threshold (Bank 1) — Mitsubishi from www.drive2.ru
If DTC P0421 is stored in the engine ECU, reprogram the ECU to the latest software level prior to suspecting a fault with the ATC Expect the upper temp sensor to fight you on the way out
Check that the exhaust pipe has no looseness of flange or pipe breakage Misfire codes, throttle position sensor codes, manifold air pressure codes, and mass air flow sensor codes should be addressed before attempting to diagnose a stored code P0421 CONDITION: A subject vehicle may exhibit an illuminated MIL (Malfunction Indicator Lamp) with DTC (Diagnostic Trouble Code) P0421 (ATC Deterioration Monitoring)
Fehlercode P0421 Mitsubishi P0421 Code Warm Up Catalyst Efficiency. This is a fairly common problem, IDK why your dealer is confused Diagnosis: This trouble code may not have any effect on the driveability of the vehicle, but if left unresolved for a long.
Código P0421 — Solución, Causas y Sintoma YouTube. What are the common symptoms of OBDII code P0421 (Warm Up Catalyst Efficiency Below Threshold Bank 1)? The common symptoms of P0421 include decreased fuel efficiency, the illumination of the Check Engine Light, and potential rattling or misfiring noises from the engine The engine ECU may falsely detect an issue with the ATC (After