fault codes '94 Explorer

Reply Subscribe

Thread Tools

Search this Thread

Dec 24, 2003 | 12:13 PM

hawkfan4

Thread Starter

New User

Joined: Dec 2003

Posts: 1

Likes: 0

fault codes '94 Explorer

'94 Explorer, 101,000 miles. Check engine light on; vehicle sometimes sluggish. Fault codes indicate 181 and 189 adaptive fuel rich limit reached at part throttle, sys. rich, cyl. bank #1 and #2. Code 186, injector pulse width higher than expected with EARO sensor. 341, octane adjust service pin open. Any ideas?

Jan 20, 2004 | 03:13 PM

bob arrington

Posting Guru

Joined: Jul 2003

Posts: 1,280

Likes: 0

From: alaska

check your cat and see if its plugged, check your air filter also , what engine do you have ?good luck , bob

Jan 20, 2004 | 05:56 PM

EPNCSU2006

Lead Driver

Joined: Nov 2002

Posts: 9,557

Likes: 44

From: Concord, NC

Sounds like possibly a stuck open injector, or maybe a vacuum leak. Exporers and rangers like to have bad O2 sensors as well, which could be your problem, but I'd check other things first. I doubt a plugged cat. Run some fuel injector cleaner, that usually cleans up hesitation. Since the injector pulse width is higher than expected, it is putting more fuel in than it thinks it needs, possibly due to bad O2 sensors, or a vacuum leak. If it's a mass air motor, I would clean the heating element in the mass air meter, which usually makes the vehicle run lean as well.