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Juan Crespo
Juan Crespo, Tech Trainer
Category: Ford
Satisfied Customers: 1526
Experience:  A.S.E. Master Technician, Advanced Level, Emissions - Asian, Domestic, & European
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Code 172 : the right bank runs lean : 1994 mustang gt : yes.

Customer Question

code 172
JA: Have you scanned the code? Have you tried to reset it?
Customer: the right bank runs lean
JA: What is the model/year of your Ford?
Customer: 1994 mustang gt
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: yes. nothing so far
JA: Anything else you think the mechanic should know?
Customer: just replaced the Icm may not be correct module
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the Ford Mechanic about your situation and then connect you two.
Submitted: 1 year ago.
Category: Ford
Expert:  Juan Crespo replied 1 year ago.

Hi there.

Try to induce a rich condition by introducing carb cleaner through one of vacuum hoses connected to the intake. If the O2 sensor goes rich, then you'll know the issue is either vacuum or fuel pressure/volume related.