Error code
OBD2 P0424
OBD2P0424
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Heated Catalyst Temperature Below Threshold.
Severity
moderateYou can continue driving, but your fuel economy may suffer and emissions will be higher.
Summary
P0424 indicates that the heated catalyst temperature in bank 1 of the catalytic converter is below the expected threshold.
Common Causes
- Lack of maintenance leading to engine problems such as faulty oxygen sensors or cylinder misfires
- A slow-reacting (lazy) upstream oxygen sensor causing excessive heating and cooling of the catalytic converter
Diagnosis
- Check for exhaust system leaks between the engine and catalytic converter.
- Use a scan tool or digital oscilloscope to compare voltage readings of upstream and downstream oxygen sensors while idling and at highway cruising speed.
FAQ
Can I drive with P0424?
Yes, but your fuel economy will be affected and emissions will increase. It's recommended to address the issue promptly.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
More OBD2 codes
- P0400Exhaust Gas Recirculation Flow
- P0401Exhaust Gas Recirculation Flow Insufficient Detected
- P0402Exhaust Gas Recirculation Flow Excessive Detected
- P0403Exhaust Gas Recirculation Control Circuit
- P0404Exhaust Gas Recirculation Control Circuit Range/Performance
- P0405Exhaust Gas Recirculation Sensor 'A' Circuit Low
- P0406Exhaust Gas Recirculation Sensor 'A' Circuit High
- P0407Exhaust Gas Recirculation Sensor 'B' Circuit Low
- P0408Exhaust Gas Recirculation Sensor 'B' Circuit High
- P0409Exhaust Gas Recirculation Sensor 'A' Circuit
- P0410Secondary Air Injection System
- P0411Secondary Air Injection System Incorrect Flow Detected