2002 Ford Ranger Will not complete all readiness tests

Tiny
MWOPOT
  • MEMBER
  • 2002 FORD RANGER
  • 6 CYL
  • 4WD
  • MANUAL
  • 82,000 MILES
Recently my O2 sensor wires fell onto my exhaust manifold. The wires melted, shorted, and caused a few trouble codes. I fixed them and now I am getting a trouble code saying it is running lean on that sensor. I am also getting another code saying that "Not all rediness tests completed". Could the shorted wires damaged the computer?
Saturday, November 1st, 2008 AT 11:35 AM

3 Replies

Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
What do u have for codes?
Check fuses
I do not suspect PCM it should be protected by fuses
check and suspect the wires
check for vacuum leaks check MAF sensor
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Sunday, November 2nd, 2008 AT 6:44 PM
Tiny
MWOPOT
  • MEMBER
  • 3 POSTS
The codes I am getting are P1131 (Lack of HO2S11 Switches- Sensor indicates lean) on a regular scan and P1000 (OBD Systems Readiness Test Not Complete) on a continuous scan. I have a Blue Point (Snap-On) YA3120 CanOBD 2 & 1 diagnostic scan tool. I am no longer getting the P1132 (rich bank 1, sensor 1). Flashing emblems on scanner said CAT and EVA (I'm assuming for evap system) were problems with the readiness tests. Now all I am getting is the EVA. The only thing remaining constant is the lean code. I am suspecting a bad injector, but the readiness test part is throwing me for a loop. Any suggestions would help.
Thanks
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Monday, November 3rd, 2008 AT 9:34 PM
Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
Possible causes are :
 FUEL SYSTEM
Excessive fuel pressure, check for leaking or bad injector, leaking fuel pressure regulator, low fuel pressure, engine low on fuel, vapor recovery system fault.

 INTAKE SYSTEM
leaking air after NAF sensor, intake gasket, vacuum leaks, PCV valve
 EGR system
check EGR valve if stuck or leaking check for exhaust leak before or near the O2 sensor, check oil, check cam timing

do u have any symptom :lack of power, spark knock, buck, jerk, hesitation on acceleration
if so suspect MAF sensor
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Tuesday, November 4th, 2008 AT 6:21 AM

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