0 like 0 dislike
832 views
by

After letting it sit about 30 minutes it started and I drove home, about a mile. After about another 45 minutes I drove to a parts store to have engine codes scanned(the light came on once it stalled). Afterwards it would turnover but not start. after letting sit another 20 minutes I could drive home. The codes are as follows, P0171, P0174, p0443, p1516, p1682, p2101

Vehicle: 2006 GMC Envoy Denali, 5.3L

1 Answer

0 like 0 dislike
by (13.4k points)
P0171 Fuel trim lean Bank 1

P0174 Fuel trim lean Bank 2

P0443 Evaporative emission control system Purge control valve circuit malfunction

P1516 Throttle actuator control (TAC) moduel throttle actuator position perfomance

P1682 Igntion 1 switch circuit 2

P2101 Throttle control module throttle actuator position perfromance

You may just have 2 different problems a lean fuel trim code. which are usually caused by a vacuum leak or a MAF sensor that is not reporting the correct inflow of air entering the engine . Where a MAF cleaning usually solve this code condition. P1516 and P2101 These are for the throttle actuator, because there is no famous P2135 which would be a throttle actuator problem itself ,and a reduce engine mode. This would make it a electrical problem what stands out is having P0443 and P1682 Inorder to have a P1682 the voltage would have to get short to ground. or have a failing Powertrain relay. Another cause this would be a shorting Purge control solenoid. which would affect the voltage for switch circuit 2 which supplies voltage to the TAC and can set a P1682.  This is going to be a very intermittent code condition and to resolve it you would spend alot of time diagnosing the problem, and making stalling a hobby. Replace 2 item the Purge control solenoid and the Powertrain relay as a start.

Related questions

0 like 0 dislike
1 answer 358 views
0 like 0 dislike
0 answers 1.9k views
0 like 0 dislike
1 answer 483 views
0 like 0 dislike
1 answer 518 views

36.2k questions

32.2k answers

1.3k comments

22.8k users

Need A Repair Shop?
Find local automotive repair shops in your area.
Does your car have Safety Recalls? → Check here
...