Stalling problem, idle problem, loss of power going up hills, completely powering down sometimes, heater blanking out sometimes and fuel smell coming inside the truck

Asked by Oct 09, 2019 at 10:37 AM about the 2007 Chevrolet Avalanche LT 4WD

Question type: Maintenance & Repair

Codes that pop up, trying to find the
main problem
P0304 cylinder misfire
P0036 H02 heater control circuit
P0054 H02s heater resistance
P0449 Evaporative emission system
vent control circuit intermittent
P0521 engine oil pressure sensor
P0304 cylinder 4 misfire
P0036 H02s heater control circuit
P0054 H02s heater resistance
P0449 same as above
P0141 02 heater circuit

2 Answers

Also transmission has been shifting hard to second gear and sometimes it doesn't. There has to be a main problem that has domino effected for all of this. Any solutions?

79,955

That's a lot of codes for one car. And I suspect that that's the problem. first, find the cause of the misfire and fix it. Then fix the EVAP problem and see if soe of the other codes vanish. Maybe all of them will.

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