O2 Sensor Codes

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Jan 10, 2005 | 01:10 PM

OldSchool AG

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O2 Sensor Codes

I assume it's possible the connector is dirty or the wire got pinched. Can anyone with a Bentley confrim that "B1 S2" refers to the post-cat sensor? I'm sure the last one, 17545, is due to my dying MAF.

TIA!

17522 - Oxygen (Lambda) Sensor: B1 S2: Internal Resistance too High
P1114 - 35-00 - -

17526 - Oxygen (Lambda) Sensor Heating: B1 S2: Open Circuit
P1118 - 35-00 - -

16524 - Oxygen (Lambda) Sensor B1 S2: No Activity
P0140 - 35-00 - -

17545 - Fuel Trim: Bank 1 (Add): System too Rich
P1137 - 35-10 - - - Intermittent

Jan 10, 2005 | 01:23 PM

TTschwing

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Re: O2 Sensor Codes

Yup...it is the rear one. Do a block 32...You can do that sitting still...Negatives are too rich: From the Bentley.......

Oxygen sensor adaptation value in range:

-10.0 to .-25.0 %

Leak in intake area (pressure side between turbocharger and intake manifold)
- Check intake system for leaks and repair false air Page 24-75 .

Oil thinning
- Change oil or perform swift country open) road test

High oil consumption

Mass Air Flow (MAF) sensor faulty
- Check Mass Air Flow (MAF) sensor Page 24-67

Evaporative Emission (EVAP) canister purge regulator valve remains stuck in open position
- Check Evaporative Emission (EVAP) canister purge regulator valve Page 24-136

Fuel pressure too high
- Check fuel pressure regulator Page 24-39

Fuel injector does not close
- Check fuel injectors Page 24-44

Oxygen sensor heating faulty
Oxygen sensor faulty
- Check oxygen sensor heating Page 24-108

Jan 10, 2005 | 01:27 PM

OldSchool AG

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Thanks!!!

Jan 10, 2005 | 01:28 PM

TTschwing

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Here's a test sequence..

Test sequence

- Disconnect 4-pin harness connector to oxygen sensor behind catalytic converter; Component location overview Page 24-6 .

- Connect multimeter between terminal 1 and 2 of relevant connector for resistance measurement.
Specified value at room temperature: 1 to 5 ohms

Note:

At higher temperatures, resistance climbs sharply.

Replace sensor if not within range..

Jan 10, 2005 | 01:31 PM

TTschwing

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Here's a voltage test...

These are only $23 anyway.....:-)

Testing primary voltage

- Disconnect the 4-pin harness connector to the oxygen sensor behind catalytic converter (below a black plastic cover at underside of vehicle)

- Connect multimeter between terminal 3 and 4 (4 is at the curved end of the plug) for voltage measurement.
- Switch ignition on.
Specification: 0.400 to 0.500 V
- Switch ignition off.

If specified value is not obtained:

- Test oxygen sensor wires Page 24-107 .

If specified value is obtained:

- Replace oxygen sensor behind catalytic converter.