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2000 Jeep Grand Cherokee Bank 1 sensor 1 o2 high voltage

Model: 2000 Jeep Grand Cherokee Fault Code: P0171 Posted: 2016-10-29 21:00

2000 jeep grand cherokee laredo 4.0l I replaced the engine and transmission 2 weeks ago and I keep faulting for a 02 sensor high voltage I've changed them both and it's still faulting.. b4 I changed sensors it would start running real bad at stop signs and red lights almost cutting off.. I've looked at all I know... No wire damage Harness has no burnt wires I have a obd2 code reader and been clearing codes and getting 10 day tags.. Help!!!

Related fault codes

P0171

Comments (5)

Anonymous 2016-10-30 09:51

What are ALL the codes - lets start easy simple - with scanner what is the voltage B1S1 - Might also check signal return voltage with a DVOM. Check fuel pressure and with KOEO observe pressure drop -drops Xpsi in 5min...

Anonymous 2017-01-08 12:38

Replaced CPS n plugs. Still putting out codes p1391, p0351,p0352,p0353. Anyone know what these codes are.

Anonymous 2017-01-09 08:00

those are ign coil codes.... And a CMP or CKP code- did you touch distributor? I believe the 2000 jeep used a coil rail - all coils together might want to ck plug install.. Champion plugs?

Anonymous 2018-02-03 12:43

I just sealed the engine , codes are comming up ,having trouble with sensors , mostly p1391 p0455

Anonymous 2018-02-03 12:44

That was swaped engine