Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD2004MUSTANG BASE, 2D COUPE, 3.9 6, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 2537 (ENGINE CONTROLS - POWERTRAIN DTC CHARTS & DESCRIPTIONS - DTC P0001 THROUGH DTC P0217 - (EXCEPT DIESEL & HYBRID))DTC P013B: O2 SENSOR SLOW RESPONSE - LEAN TO RICH BANK 1, SENSOR 2
2004 Ford Mustang Base, 2D Coupe, 3.9 6, Automatic
DTC P013B: O2 Sensor Slow Response - Lean To Rich Bank 1, Sensor 2
2004 Ford Mustang Base, 2D Coupe, 3.9 6, AutomaticSECTION DTC P013B: O2 Sensor Slow Response - Lean To Rich Bank 1, Sensor 2
WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2011 Mercury Milan, 2011 Mercury Mariner, 2011 Mercury Grand Marquis, 2011 Lincoln Town Car, and 2011 Lincoln Navigator L. However, it is still accessible from the selected car via links, so may be relevant.
P013B - O2 SENSOR SLOW RESPONSE - LEAN TO RICH BANK 1, SENSOR 2
| Description: | During a deceleration fuel shut-off (DFSO) event, the powertrain control module (PCM) monitors how quickly the rear heated oxygen sensor (HO2S) switches from lean to rich. The measured rate of the lean to rich switch is compared to a calibrated fault threshold value. The measured rate of the lean to rich switch is compared to a calibrated fault threshold value. This DTC sets if the measured value is slower than the threshold value. | ||
| Possible Causes: |
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| Diagnostic Aids: | Check for leaks in the exhaust system. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | GO to PINPOINT TEST DW . | ||
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.