CEL light P1118?

[rb101]

I've been getting a P1128 and P1130 code about every two weeks. I've just been resetting the codes until I replace the AOS (getting the massive sucking and stumbling idle when I remove the oil cap). Today the CEL popped on and it was P1118. What is this code, I can't find it anywhere.

Rick

99 996C4

87 944S

[Loren]

P1118 Oxygen Sensor Heating After TWC, Bank 2 – Above Limit

P1118 Oxygen Sensor Heating After TWC, Bank 2 – Below Limit

P1118 Oxygen Sensor Heating After TWC, Bank 2 – Open Circuit

P1118 Oxygen Sensor Heating After TWC, Bank 2 – Signal Implausible

– Heating resistance too low

– Short to B+

– Short to ground

– Corrosion in connector

– Break in wiring except for a few litz wires

– Break in wiring

– Heating resistance too great

– Open circuit in sensor line

– Oxygen sensor

You will need to run a few resistance checks to find the actual problem.

Check resistance of oxygen sensor heating.

1. Remove connector of oxygen sensor 2 after TWC.

2. Connect ohmmeter to pin 1 and pin 2 of the oxygen sensor connector towards the oxygen sensor.

Display: < 2.6 Ω at 25 °C

Perform adaptation.

1. Switch on the ignition.

2. Wait one minute. Do not press the accelerator.

3. Switch off the ignition for at least 10 seconds.

4. Read out the fault memory.

Measure resistance between oxygen sensor housing and oxygen sensor heating.

1. Remove connector of oxygen sensor 2 after TWC.

2. Connect ohmmeter to pin 1 of oxygen sensor housing and oxygen sensor connector towards the oxygen sensor.

Display: ∞=Ω

3. Connect ohmmeter to pin 2 of oxygen sensor housing and oxygen sensor connector towards the oxygen sensor.

Display: ∞=Ω

It will be either a bad connection, wiring, or bad O2 sensor. Most likely the O2 sensor but best to make sure.

[rb101]

Loren,

You're the heat. I'll check it out this weekend.

[DonkeyWorx]

Loren,

I too am getting this code (P1118).

My question: Where is the Oxygen Sensor After TWC, Bank 2?

After Cat. On the driver or passenger side?

Thanks.

-Val-

[Dharn55]

Bank 2 is the passenger side. but the header from this side connects to the cat and crosses over to the drivers side, so the after cat sensor is on the drivers side. Follow the pipes and you will find it.