2000 Ford Escort Service Engine Soon Light

MATANGA

MEMBER
2000 FORD ESCORT
4 CYL
2WD
MANUAL
95,000 MILES

Check Engine Light came on about a month ago. Took it to mechanic, who could not find anything wrong. Rset computer, and ran fine until it came on again a month later. Thought there was water in the fuel tank, so poured a bottle of HEET before refueling. Light went off after driving the car for a minute. Light came back on yesterday. I've had my heater on all 3 times this has happened. First time code was P0176 "Bank 1 too lean". What else could it be? Fuel cap seems to be fine.

Thanks !

4 Replies

DAVE H

MECHANIC
13,383 POSTS

Check/clean MAF sensor?

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Wednesday, December 17th, 2008 AT 2:51 PM

MATANGA

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3 POSTS

Thanks ! I'll try that. What do I use to clean it?

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Wednesday, December 17th, 2008 AT 3:08 PM

MATANGA

MEMBER
3 POSTS

OK, took it to Autozone and got following codes:

P1506
P0171

Before that, car ran wtih SEC light, but ran fine.
I cleared the codes, but then car started sputtering at times. It would shut off and I'd have to restart, or press the gas all the way down to return it to life. What could it be?

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Wednesday, December 17th, 2008 AT 5:06 PM

DAVE H

MECHANIC
13,383 POSTS

DTCs P0171, P0172, P0174 and P0175 indicate a problem when adaptive fuel strategy senses a lean or rich condition beyond the minimum or maximum calibrated limit. Possible causes for these faults are.
Fuel System

Excessive fuel pressure, leaking or contaminated fuel injectors, leaking fuel pressure regulator, low fuel pressure or engine running out of fuel or vapory recovery system fault.
Induction System

Air leaks after MAF sensor, air intake system obstructions, vacuum leaks, PCV system or improperly seated engine oil dipstick.
EGR System

Leaking gasket, stuck EGR valve or leaking diaphragm or EVR.
Engine Mechanical

Engine oil overfilled, cam timing, cylinder compression or exhaust leaks before or near HO2S.
Inspect engine for obvious defects in specified systems. Repair as necessary. If no faults are found, go to TEST DC, step 25).

20) DTC P1506: Check For Vacuum Leaks

This DTC indicates IAC system has reached over speed malfunction. Possible causes are.
IAC Circuit Short To Ground
IAC Assembly Stuck Open
Air Intake Leaks Or Restrictions
Damaged Throttle Body
Contaminated Or Damaged IAC Valve Assembly
Faulty Powertrain Control Module (PCM)
Start engine and allow to idle. Inspect air inlet system any of the following possible faults.
Cracked Or Punctured Air Inlet Tube
Loose Inlet Air Tube Or Air Cleaner Housing
Loose Or Damaged Throttle Body
Contaminated Or Damaged IAC Valve Assembly
Faulty EGR Valve Or Gasket
Faulty PCV Valve Or Hose
Check entire intake air system for vacuum leaks. Repair as necessary. If no vacuum leaks are found, go to next step.
NOTE:EVAP canister is also referred to as carbon canister.

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Wednesday, December 17th, 2008 AT 5:32 PM