P0340 Camshaft Position Sensor A Bank 1 Circuit Mal. P0135 02 Sensor Heater Circuit Mal Bank 1 Sensor 1 P0141 02 Sensor Heater Circuit Mal.

BAYSURFER1.1

MEMBER
1995 FORD RANGER
6 CYL
2WD
MANUAL
158,665 MILES

I have a 95 Ranger XLT ext cab 3.0L (EEC-V). The engine light was on so I took it to Advance and they read the codes.
P0340 Camshaft Position Sensor A Bank 1 Circuit Mal.
P0135 02 Sensor Heater Circuit Mal Bank 1 Sensor 1
P0141 02 Sensor Heater Circuit Mal Bank 1 Sensor 2
P0155 02 Sensor Heater Circuit Mal Bank 2 Sensor 1
I replaced all the parts and the engine light stayed off when I reconnected the battery and went for a drive. The next day the light was on again, I went to another Auto store and had them read the codes. Same codes! I told them I just replaced the parts and they reset the codes for me. It was again fine until I turned off the truck and turned it on again. The odds of all these parts being bad is small. Plus the truck does run better since I put them in. Why is the engine light coming back on?

2 Replies

TOBYU

MEMBER
89 POSTS

My guess is you have a lack of power to the oxygen sensor circuit. Check for chaffed wires and follow the harness up from the sensors as far as you can.

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Friday, December 14th, 2007 AT 2:08 AM

KEN L

MASTER CERTIFIED MECHANIC
47,643 POSTS

I have seen this problem before, the ECM is out and needs replacement, here is how the job is done. It is plug and play there is no programming needed. Check out the images (below). Let us know if you need anything else.

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