2003 Mercury Sable o2 sensor question

[jdando]

Hey Gang;

The wife's Sable (2003, 32000 miles) has decided to have a check engine light come on. The code is P1131, O2 sensor shows lean condition.

Would this be covered under the emission systems warranty? Or is that only 3year/36000 miles?

It is the V6, 24 valve engine.

jeremy

[larryo340]

<TABLE cellSpacing=0 cellPadding=3 border=1><TBODY><TR><TD vAlign=top align=left>P1130 - Lack of HO2S-11 Switch, Fuel Trim at Limit </TD><TD vAlign=top align=left>The HEGO Sensor is monitored for switching. The test fails when the HO2S fails to switch due to circuit or fuel at or exceeding a calibrated limit. </TD><TD vAlign=top align=left>

Electrical:
Short to VPWR in harness or HO2S
Water in harness connector
Open/Shorted HO2S circuit
Corrosion or poor mating terminals and wiring
Damaged HO2S
Damaged PCM
Fuel System:

Excessive fuel pressure
Leaking/contaminated fuel injectors
Leaking fuel pressure regulator
Low fuel pressure or running out of fuel
Vapor recovery system
Induction System:

Air leaks after the MAF
Vacuum Leaks
PCV system
Improperly seated engine oil dipstick
EGR System:

Leaking gasket
Stuck EGR valve
Leaking diaphragm or EVR
Base Engine:

Oil overfill
Cam timing
Cylinder compression
Exhaust leaks before or near the HO2S(s)
</TD><TD vAlign=top align=left>A fuel control HO2S PID switching across 0.45 volt from 0.2 to 0.9 volt indicates a normal switching HO2S. </TD></TR><TR><TD vAlign=top align=left>P1131 - Lack of HO2S-11 Switch, Sensor Indicates Lean </TD><TD vAlign=top align=left>A HEGO sensor indicating lean at the end of a test is trying to correct for an over-rich condition. The test fails when the fuel control system no longer detects switching for a calibrated amount of time. </TD><TD vAlign=top align=left>See Possible Causes for DTC P1130 </TD><TD vAlign=top align=left></TD></TR><TR><TD vAlign=top align=left>P1132 - Lack of HO2S-11 Switch, Sensor Indicates Rich </TD><TD vAlign=top align=left>A HEGO sensor indicating rich at the end of a test is trying to correct for an over-lean condition. The test fails when the fuel control system no longer detects switching for a calibrated amount of time. </TD><TD vAlign=top align=left>See Possible Causes for DTC P1130 </TD><TD vAlign=top align=left></TD></TR></TBODY></TABLE>

Start with P1131, then check P1130 as directed, more than likely you have a vacuum leak possibly between mass air flow and throttle body.