1998 Saturn SC "02 sensors 2004 envoy" Questions

2004 GMC ENVOY XL the engine light stay on. i do a diagnostic on it the code i get is P1133 HO25/025 INSUFFICIENT SWITCHING SENSOR 1 OR BANK 1 SENSOR 1. also code PO133 02 CIRCUIT SLOW RESPONSE(BANK 1

2004 GMC Envoy check engine light remains illuminated. Diagnostics revealed codes: P1133 and P0128. P1133 points to a heated oxygen sensor and P0128 indicates a possible defective thermostat. The O2 ...

...sensors are fine, but the secondary air pump is malfunctioning and needs to be replaced. This is apparently a very common problem with this car, and I would suggest having a diagnostic ran before ...

...please help me with this code po125 i change THERMOSTAT AND ENGINE COOLANT TEMPERATURE SENSOR AND 02 HTR SENSOR AND 02 OXYGEN SENSOR AND SPARK PLUG AND LID FROM THE COOLANT AND REPLACE THE FUEL

...try to fix but still came back the same code po125 , i change engine temperature coolant sensor and 02 oxyge sensor also 02 heater sensor and thermostat and spark plug, i give up please help me . Did ...

...2004 envoy In my database, that code doesn't compute for your vehicle? With the larger engine, my database says bank 1 and bank 2, sensor 1 and sensor 2. No sensor three. The code does talk about 02 ...

...02-05 Chevrolet, Buick, Oldsmobile and GMC Mid-Sized Utilities Reduced Power Light On and DTC P1680 P1221 and/or P1271 Stored in the PCM - kw fan clutch SES light power MIL 4.2 LL8 - (Nov 1, ...

2004 to 2008 and above GMC catalytic tend to plug easy, If the catalytic is to difficult to disconnect, plus you need to secure from falling remove the 02 sensor on each bank before the

...02 again...same problem Do you have the 6-cyl or the 8-cylinder model? The P0135 code is for an upstream O2 sensor. The 6 cylinder has one up near the exhaust manifold and another (downstream) sensor ...

02 Pontiac Firebird FB) and (04-05 Pontiac GTO VB) The following diagnosis might be helpful if the vehicle exhibits the described symptoms. Condition/Concern: Check Engine Light with a P0300 due to 2