Originally posted by yorkie:
my car was throwing same codes as yours, because the enrichment linkage fell off, check yours.



That is not an "enrichment" lingage.

It is the linkage that connects the front bank secondaries to the IMRC actuator. Without it, the front back runners won't open at around 3.5-4K like they are supposed to. The rear bank (Bank 1) is not affected by this failure.

P0141 is an electrical circuit fault unrelated to fuel mixture.

Here is the first step of the diagnostic procedure for a P0141:

H30 DTCS P0135, P0141 and P0155 AND P0161: HO2S HEATER CIRCUIT IS OPEN, SHORTED TO GROUND, SHORTED TO VPWR OR EXCESSIVE CURRENT DRAW

Diagnostic Trouble Codes (DTCs) P0135 P0141, P0155 and P0161 indicate a short to ground, open, or short to VPWR in the HO2S heater circuit.

DTC/HO2S Reference List:

DTC P0135 = HO2S HTR-11

DTC P0141 = HO2S HTR-12

DTC P0155 = HO2S HTR-21

DTC P0161 = HO2S HTR-22

Possible causes:

-- Shorts to VPWR in harness or HO2S.

-- Water in connectors.

-- Cut or pulled wires.

-- Disconnected wiring.

-- Open VPWR circuit.

-- Open GND circuit.

-- Low battery voltage.

-- Corrosion or poor mating terminals.

-- Damaged HO2S heater.

-- Damaged PCM.

l NOTE:
On some applications, a vehicle hoist is required to access the HO2S harness.

Visually inspect the HO2S circuit for exposed wiring, contamination, corrosion and proper assembly.

l Were any concerns found during the visual inspection?

Yes
REPAIR any concerns found in the visual inspection. COMPLETE PCM Reset to clear DTCs. RESTORE vehicle. RERUN «Quick Test».

No
GO to «H31».

Steve

98 Contour SE Sport 2.5 Duratec ATX The wifey's car 89 Taurus SHO - 246K miles 94 SHO ATX - 190K 1997 F-150 5.4L ATX - The Workhorse 150K. ANY THREAD WITH "OMG" or "WTF" ETC IN THE TITLE WILL BE IGNORED!