Another Random misfire and surging thread - Page 4 - Taurus Car Club of America : Ford Taurus Forum
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post #31 of 38 (permalink) Old 08-06-2019, 12:16 PM
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You need to look at long term fuel trims on both banks at idle and engine under load like driving at 50 mph. High positive trims at idle that drop toward zero under load = vacuum leak.

These days a simple code reader doesnt cut it for diagnosing problems. You need a scan tool that will show what sensors are reporting to the PCM and what signals the PCM is outputting to various actuators.

Get Forscan (free download for PC) and a good quality ELM327.

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post #32 of 38 (permalink) Old 08-06-2019, 02:52 PM Thread Starter
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Already downloaded and ordered as I had been thinking about this for a while. Thanks!

It'll be a couple of days before I get to play with it.
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post #33 of 38 (permalink) Old 08-07-2019, 06:00 AM
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Which ELM327 adapter is better, wired or wireless? Is one type better than another?
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post #34 of 38 (permalink) Old 08-07-2019, 04:49 PM Thread Starter
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I ordered a wired one. Cheaper.
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post #35 of 38 (permalink) Old 08-08-2019, 02:31 PM Thread Starter
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So, I got my new toy today and below is the log. I hope somebody can interpret it or at least tell me where else to look.

I can tell both o2 sensors are problematic, but one is brand new, the other is an old one. Neither presented any problem until I put the new ones in so I can't help but wonder if I have the wrong parts. I read elsewhere here about fuel pump module relays being a problem so I switched mine out--made no difference. Fuel pump driver module? Is that in the main computer?
I did replace it but maybe I should put the old one back in?

Thanks!

Log below:

===EATC DTC None===
Successful DTC reading, no error codes found

Module: Electronic Automatic Temperature Control

===END EATC DTC None===

===OBDII DTC P1132-C===
Code: P1132 - HO2S11 not switching correctly. Sensor indicates rich.

Status:
- Confirmed - malfunction is confirmed

Module: On Board Diagnostic II

Diagnostic Trouble Code details

HO2S11 not switching correctly. Sensor indicates rich.

Low Manifold Vacuum on TMAP systems only.

High Fuel Pressure

This DTC may be caused by :

Air intake restriction

===END OBDII DTC P1132-C===

===OBDII DTC P1152-C===
Code: P1152 - Lack of HO2S21 Switch Sensor indicates Rich

Status:
- Confirmed - malfunction is confirmed

Module: On Board Diagnostic II

Diagnostic Trouble Code details

Lack of HO2S21 Switch Sensor indicates Rich

Suspect HO2S21.

Dirty air filter.

This DTC may be caused by :

High fuel pressure.

Damaged fuel injector.

Suspect PCM.

===END OBDII DTC P1152-C===

===OBDII DTC P1233-P===
Code: P1233 - Fuel pump driver module offline

Status:
- Pending - malfunction is expected to be confirmed

Module: On Board Diagnostic II

Diagnostic Trouble Code details

Fuel pump driver module offline

Suspect FPM circuit.

Open or Shorted FPM.

This DTC may be caused by :

Suspect PCM.

===END OBDII DTC P1233-P===

===ABS DTC None===
Successful DTC reading, no error codes found

Module: Antilock braking system

===END ABS DTC None===

===PCM DTC P1233===
Code: P1233 - Fuel pump driver module offline

Module: Powertrain Control Module

Diagnostic Trouble Code details

Fuel pump driver module offline

Suspect FPM circuit.

Open or Shorted FPM.

This DTC may be caused by :

Suspect PCM.

===END PCM DTC P1233===

===PCM DTC P1000===
Code: P1000 - On-Board Diagnostic (OBD) Systems Readiness Test Not Complete

Module: Powertrain Control Module

Diagnostic Trouble Code details

Check of all systems is not complete since last memory clear.

--Possible Causes--
- The vehicle is new from the factory and has not yet been through a complete OBD Drive Cycle.
- The battery or PCM has been disconnected.
- An OBD monitor failure had occurred prior to completion of an OBD Drive Cycle.
- The PCM DTCs have been cleared as part of a service process.

Note: The only way P1000 can be cleared (removed) from memory is when all of the OBD monitors have been successfully completed during normal vehicle operation.

P1000 cannot be cleared from the PCM when: 1. The thermostat is stuck open and a DTC is not generated. 2. There is an open VSS circuit and a DTC is not generated. 3. If the vehicle has a Power Take Off (PTO), the circuit is shorted to VPWR or B+, or the PTO is ON during Self-test.

The purpose of the Diagnostic Trouble Code DTC P1000 is to indicate that not all of the On Board Diagnostics OBD monitors have yet been successfully completed. You may also refer to the OBD Drive Cycle defined under the Powertrain Control/Emission Diagnosis Manual-Diagnostic Methods or the Owner's Manual.

Remember: It is not necessary to remove P1000 from the Powertrain Control Module PCM by driving the vehicle.

===END PCM DTC P1000===

===PCM DTC P1132===
Code: P1132 - HO2S11 not switching correctly. Sensor indicates rich.

Module: Powertrain Control Module

Diagnostic Trouble Code details

HO2S11 not switching correctly. Sensor indicates rich.

Low Manifold Vacuum on TMAP systems only.

High Fuel Pressure

This DTC may be caused by :

Air intake restriction

===END PCM DTC P1132===

===PCM DTC P1152===
Code: P1152 - Lack of HO2S21 Switch Sensor indicates Rich

Module: Powertrain Control Module

Diagnostic Trouble Code details

Lack of HO2S21 Switch Sensor indicates Rich

Suspect HO2S21.

Dirty air filter.

This DTC may be caused by :

High fuel pressure.

Damaged fuel injector.

Suspect PCM.

===END PCM DTC P1152===

===RCM DTC None===
Successful DTC reading, no error codes found

Module: Restraint Control Module

===END RCM DTC None===

===GEM DTC B1352===
Code: B1352 - Ignition key in circuit fault

Module: Generic Electronic Module

Diagnostic Trouble Code details

Ignition key in circuit fault

===END GEM DTC B1352===

===ABS DTC None===
Successful DTC reading, no error codes found

Module: Antilock braking system

===END ABS DTC None===
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post #36 of 38 (permalink) Old 08-11-2019, 03:08 PM Thread Starter
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So I now have BOTH new o2 Sensors in and I'm getting codes 1131,1132,1151,1152. I only changed these sensors on spec and had no codes before then. My Ford guy swears these are the right ones but I don't think so. I can't put the old ones back as I damaged one taking it out.

Can anyone give me guaranteed correct part numbers for the correct o2 sensors? I don't care what brand.

Thanks
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post #37 of 38 (permalink) Old 08-11-2019, 07:57 PM
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Like already stated you need to get a scan tool that reads live data and check your long term fuel trims. You may have a large vacuum leak.
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post #38 of 38 (permalink) Old 08-12-2019, 01:21 PM Thread Starter
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Well, I ran Forscan again and the log is attached below. To repeat: There were no indications of problems with o2 sensors until I put the new ones in. You will note one sensor indicates lean, the other rich. ??

I couldn't figure out in Forscan where LTFT was so I used my codereader, pics attached.

I've used my codereader several times over the past few weeks and this is the first time it's ever displayed any number in LTFT other than zero.

FWIW, these tests were run with the big line to the vacuum distribution thingy on the firewall pinched closed.

===EATC DTC None===
Successful DTC reading, no error codes found

Module: Electronic Automatic Temperature Control

===END EATC DTC None===

===OBDII DTC P1131-C===
Code: P1131 - Lack of HO2S11 Switch Sensor Indicates Lean

Status:
- Confirmed - malfunction is confirmed

Module: On Board Diagnostic II

Diagnostic Trouble Code details

HO2S11 not switching correctly. Sensor indicates lean.

Air leaks at the exhaust manifold

This DTC may be caused by :

Low fuel pressure.

Manifold vacuum leak.

HO2SHTR11 Heater Circuit Malfunction

===END OBDII DTC P1131-C===

===OBDII DTC P1132-P===
Code: P1132 - HO2S11 not switching correctly. Sensor indicates rich.

Status:
- Pending - malfunction is expected to be confirmed

Module: On Board Diagnostic II

Diagnostic Trouble Code details

HO2S11 not switching correctly. Sensor indicates rich.

Low Manifold Vacuum on TMAP systems only.

High Fuel Pressure

This DTC may be caused by :

Air intake restriction

===END OBDII DTC P1132-P===

===OBDII DTC P1151-C===
Code: P1151 - Lack of HO2S21 Switch Sensor indicates Lean

Status:
- Confirmed - malfunction is confirmed

Module: On Board Diagnostic II

Diagnostic Trouble Code details

Lack of HO2S21 Switch Sensor indicates Lean

Suspect HO2S21.

This DTC may be caused by :

Ignition misfire.

Low fuel pressure.

Manifold vacuum leak.

Disconnected or Damaged vacuum hose.

Restricted or Damaged fuel injector.

Suspect PCM.

===END OBDII DTC P1151-C===

===OBDII DTC P1152-P===
Code: P1152 - Lack of HO2S21 Switch Sensor indicates Rich

Status:
- Pending - malfunction is expected to be confirmed

Module: On Board Diagnostic II

Diagnostic Trouble Code details

Lack of HO2S21 Switch Sensor indicates Rich

Suspect HO2S21.

Dirty air filter.

This DTC may be caused by :

High fuel pressure.

Damaged fuel injector.

Suspect PCM.

===END OBDII DTC P1152-P===

===ABS DTC None===
Successful DTC reading, no error codes found

Module: Antilock braking system

===END ABS DTC None===

===PCM DTC P1000===
Code: P1000 - On-Board Diagnostic (OBD) Systems Readiness Test Not Complete

Module: Powertrain Control Module

Diagnostic Trouble Code details

Check of all systems is not complete since last memory clear.

--Possible Causes--
- The vehicle is new from the factory and has not yet been through a complete OBD Drive Cycle.
- The battery or PCM has been disconnected.
- An OBD monitor failure had occurred prior to completion of an OBD Drive Cycle.
- The PCM DTCs have been cleared as part of a service process.

Note: The only way P1000 can be cleared (removed) from memory is when all of the OBD monitors have been successfully completed during normal vehicle operation.

P1000 cannot be cleared from the PCM when: 1. The thermostat is stuck open and a DTC is not generated. 2. There is an open VSS circuit and a DTC is not generated. 3. If the vehicle has a Power Take Off (PTO), the circuit is shorted to VPWR or B+, or the PTO is ON during Self-test.

The purpose of the Diagnostic Trouble Code DTC P1000 is to indicate that not all of the On Board Diagnostics OBD monitors have yet been successfully completed. You may also refer to the OBD Drive Cycle defined under the Powertrain Control/Emission Diagnosis Manual-Diagnostic Methods or the Owner's Manual.

Remember: It is not necessary to remove P1000 from the Powertrain Control Module PCM by driving the vehicle.

===END PCM DTC P1000===

===PCM DTC P1131===
Code: P1131 - Lack of HO2S11 Switch Sensor Indicates Lean

Module: Powertrain Control Module

Diagnostic Trouble Code details

HO2S11 not switching correctly. Sensor indicates lean.

Air leaks at the exhaust manifold

This DTC may be caused by :

Low fuel pressure.

Manifold vacuum leak.

HO2SHTR11 Heater Circuit Malfunction

===END PCM DTC P1131===

===PCM DTC P1132===
Code: P1132 - HO2S11 not switching correctly. Sensor indicates rich.

Module: Powertrain Control Module

Diagnostic Trouble Code details

HO2S11 not switching correctly. Sensor indicates rich.

Low Manifold Vacuum on TMAP systems only.

High Fuel Pressure

This DTC may be caused by :

Air intake restriction

===END PCM DTC P1132===

===PCM DTC P1151===
Code: P1151 - Lack of HO2S21 Switch Sensor indicates Lean

Module: Powertrain Control Module

Diagnostic Trouble Code details

Lack of HO2S21 Switch Sensor indicates Lean

Suspect HO2S21.

This DTC may be caused by :

Ignition misfire.

Low fuel pressure.

Manifold vacuum leak.

Disconnected or Damaged vacuum hose.

Restricted or Damaged fuel injector.

Suspect PCM.

===END PCM DTC P1151===

===PCM DTC P1152===
Code: P1152 - Lack of HO2S21 Switch Sensor indicates Rich

Module: Powertrain Control Module

Diagnostic Trouble Code details

Lack of HO2S21 Switch Sensor indicates Rich

Suspect HO2S21.

Dirty air filter.

This DTC may be caused by :

High fuel pressure.

Damaged fuel injector.

Suspect PCM.

===END PCM DTC P1152===

===RCM DTC None===
Successful DTC reading, no error codes found

Module: Restraint Control Module

===END RCM DTC None===

===GEM DTC B1352===
Code: B1352 - Ignition key in circuit fault

Module: Generic Electronic Module

Diagnostic Trouble Code details

Ignition key in circuit fault

===END GEM DTC B1352===

===ABS DTC None===
Successful DTC reading, no error codes found

Module: Antilock braking system

===END ABS DTC None===
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