P0420 on Dodge Vehicles
The bank 1 catalytic converter no longer stores enough oxygen to clean the exhaust properly. P0420 →
9Complaints mentioning the code
#7Rank among 14 brands
3.2%Share of Dodge DTC complaints
In NHTSA owner complaints we analyzed for Dodge, P0420 was mentioned 9 times.
Most mentioned models
| Dodge Journey | 6 | |
|---|---|---|
| Dodge Charger | 1 | |
| Dodge Dart | 1 | |
| Dodge Grand Caravan | 1 |
Model years mentioned
Components named in these complaints
- Engine (6)
- Electrical System (5)
- Fuel/propulsion System (3)
- Air Bags (2)
- Unknown Or Other (2)
Reports with a crash: 0 · fire: 0 · injuries: 1
Often appears together with
P0117
Powertrain
The coolant temperature signal is pinned near zero volts, which the PCM reads as an impossibly…
Low
P0340
Powertrain
The computer lost the camshaft signal on bank 1. Expect long cranking, less power…
Moderate
P2181
Powertrain
The engine isn't warming up or holding temperature the way the computer's model says it should.
Low
Possible causes
- Catalytic converter worn out or poisoned by age, oil ash, coolant or silicone
- Rear (downstream) O2 sensor slow, contaminated or reading out of range
- Exhaust leak ahead of the rear O2 sensor (manifold, gasket, flex pipe)
- Engine fault that overheated the converter: misfire, rich mixture, leaking injector
Related codes
Source: NHTSA Complaints API (US government open data), analyzed by DTC mention.