Check engine soon light is on, what do these codes mean.


Asked by Aug 25, 2013 at 08:33 AM about the 1997 Chevrolet C/K 1500 Silverado Extended Cab SB 4WD

Question type: Maintenance & Repair

P0141---o2 heater curcuit bank 1 sensor 2.
P0155---o2 heater curcuit bank 2 sensor 1.
P0174---fuel system too lean bank 2.
P0300---engine misfire detected.
P0440---evap emission system fault.
P0719---tcc/brake switch b curcuit signal low/short.

8 Answers ....a very good site to find what you are seeking with causes and solutions

1 out of 1 people think this is helpful.
Andrew Olsen

well, it means exactly what you have here. P0141 and p0155 are usually bad o2 sensors, on occasion it can just be a wiring issue. Lean bank 2, hmm could be a vacuum leak, could be dues to the o2 sensor. p0300, random missfire, your fuel injector assemble is the first suspect but could also be a vacuum leak or bad plugs. p0719 is the input to your torque converter clutch, either wiring, brake light switch or the TCC lockup solenoid

3 out of 3 people think this is helpful.

Whats the engine size?


thanks guys. i'll let you how thing go.


Engine size is 4.3 litre v-6

1 out of 1 people think this is helpful.

I have a 1998 chevy c1500 with 139k & I got the codes p0174 & p0300, any ideas anyone?


It's a 5.7 vortec need help on it though


p0174 fuel trim system lean bank 2 p0300 engine misfire detected. P0300 has been set due to the first code. P0174---The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters can cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry. There could be a vacuum leak downstream of the MAF sensor. Read more at: Copyright ©

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