P0131
09-24-2009, 12:02 PM
#1
Retired Senior Admin
Expert Gearhead
Thread Starter
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Likes: 0
Received 28 Likes
on
24 Posts
P0131
P0131
Description
HO2S 1 CIRCUIT LOW VOLTAGE
PCM provides about 0.35 volt reference to HO2S 1. HO2S 1
sensor signal voltage varies from about one volt when exhaust is rich
to about 0.1 volt when exhaust is lean. PCM reads and stores sensor
voltage information and evaluates the voltage samples to determine
amount of time sensor voltage is out of range. If HO2S 1 voltage is
out of predetermined range, DTC will set.
Symptoms
There may be no visible symptoms to the driver, other than the MIL (Service Engine Soon).
Causes
Description
HO2S 1 CIRCUIT LOW VOLTAGE
PCM provides about 0.35 volt reference to HO2S 1. HO2S 1
sensor signal voltage varies from about one volt when exhaust is rich
to about 0.1 volt when exhaust is lean. PCM reads and stores sensor
voltage information and evaluates the voltage samples to determine
amount of time sensor voltage is out of range. If HO2S 1 voltage is
out of predetermined range, DTC will set.
There may be no visible symptoms to the driver, other than the MIL (Service Engine Soon).
Causes
- Faulty o2 oxygen sensor
- Short to voltage on O2 signal circuit
- High resistance or open on O2 signal circuit
- Replace sensor
- Repair damaged wire/connector.
Thread
Thread Starter
Forum
Replies
Last Post
