DTC P1A98 Chevrolet
Catalyst Efficiency Below Normal (Bank 2)
Catalyst Efficiency Below Normal (Bank 2)
Description
Engine speed at 1200-1700 rpm in closed loop with the throttle open for over 2 minutes, ECT Sensor more than 147ºF, MAP Sensor signal from 15.0-21.0 Hg, and the PCM detected the switch rate of the rear O2 reached 70% of the switch rate of the front O2.
Cause and Solution
Air leaks in at the exhaust manifold or exhaust pipesBase engine problems (high coolant or engine oil consumption)Catalytic converter damaged or has failedFront O2 older (aged) than the rear O2 (O2 is lazy)
Video Guide
Diagnostic Info
- DTC Code: P1A98
- Brand: Chevrolet