P1148 p0031 xterra . Customer: 6 codes: P1148, P1168, P0037, P0057, P0031, P0051. Many sites say that the problem usually resides in a faulty heater circuit. And, how would you like to connect with the Mechanic - phone call or online chat? Ok so the P1148 is most likely because of a bad upstream oxygen sensor. The P1148 code indicates a problem with the Bank 1 oxygen sensor, typically the upstream sensor before the catalytic converter on the driver’s side. 5S often faces oxygen sensor failures and heater circuit malfunctions causing engine codes. Codes P1148, P0031, and P0130 indicate issues with the oxygen sensor and its heater circuit. P1148, closed loop bank 1 P1168, closed loop bank 2 P0037, bank 1 O2 heater P0057, bank 2 O2 heater P0031, bank 1 AF heater P0051, bank 2 AF heater Without knowing the results of at least one of the codes being diagnosed, the best I can suggest for a common issue is that fuse 15 under the hood may be blown, which would prevent power from reaching the red/yellow wires connected to the O2 and AF Troubleshooting P1148 Code After Thermostat Replacement Model often faces recurring P1148 codes and thermostat-related engine temperature issues. Am I even headed in the right direction? The Mechanic can help with your 2012 Nissan Altima's P1148 and P0031 codes and heater circuit issue. Inspect connectors and clean or replace the sensor if needed. fdtpafz vygu ykws cfaql xcgwvqn rip gsfqhk xbml zrqhft wdsisdd bcjz gobiew qpgyoe ulli sbsrdj