DTC P0172 Acura
Rear Bank (Bank 1) Fuel System Too Rich
Rear Bank (Bank 1) Fuel System Too Rich
Description
The execution time is once per driving cycle and the duration time is 13 seconds or more. If long term fuel trim is lower than normal (too rich), a malfunction in the fuel metering components is detected and a DTC is stored. Engine is at running temperature, vehicle speed at 550-4,000 rpm and the system is in closed loop the long term fuel trim is lower than 0.820 (-18.0 %). NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot.
Cause and Solution
Faulty fuel pump or regulator
Engine valve clearance
Faulty coolant temp sensor
Faulty MAF sensor IAT sensor
Faulty EVAP canister purge valve
Faulty Throttle body
Video Guide
Diagnostic Info
- DTC Code: P0172
- Brand: Acura