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PO113 Fault Code on 2004 Ford Escape: MAF Sensor Replacement Not Resolving Idle Issues

Model: Ford Escape Fault Code: P0113 Posted: 2012-09-01 11:00

I recently replaced the Mass Air Flow (MAF) sensor on my 2004 Ford Escape, but the engine idle remains unstable and I'm still receiving a PO113 diagnostic trouble code. After checking the vehicle's specifications, I noticed that the Intake Air Temperature (IAT) sensor is not listed as a separate component in the 2004 Escape service manual—however, my MAF sensor has six wires, which indicates that the IAT sensor is integrated within the MAF unit. Despite replacing the MAF sensor, the PO113 code persists. Further troubleshooting revealed that the Idle Air Control (IAC) valve shows poor continuity between terminals, suggesting it may be faulty and contributing to the idle issue. I plan to replace the IAC valve next. It's important to note that OBD-II codes do not always indicate a part failure—sometimes they reflect incorrect sensor readings or signal voltage issues detected by the Powertrain Control Module (PCM). In this case, the PCM is detecting an abnormally high voltage on the IAT circuit, which may be due to wiring, grounding, or internal sensor faults even after replacement.

Related fault codes

P0113

Comments (5)

Anonymous 2012-09-01 11:52

Thanks for sharing—this is a great follow-up. Could you confirm whether your 2004 Ford Escape has a 2.0L or 3.0L engine? Also, does the MAF sensor have four or six wires? A six-wire configuration typically includes an integrated IAT sensor. Checking the freeze frame data might provide more insight—specifically, the voltage readings on the IAT circuit could help identify the root cause.

Anonymous 2012-09-01 12:12

Yes, it's a 6-cylinder 2004 Ford Escape with a six-wire MAF sensor, confirming that the IAT sensor is built into the MAF unit. The PO113 code continues to appear even after replacing the MAF—this suggests the issue isn't solely with the sensor itself. My latest diagnostics point to a faulty Idle Air Control (IAC) valve, as it shows poor continuity between terminals. I'll be testing and replacing this component next.

Anonymous 2012-09-01 12:56

Just to reiterate—OBD-II codes do not always mean you need to replace a part. In this case, the Powertrain Control Module (PCM) is detecting an abnormally high voltage on the IAT circuit, which may indicate a wiring issue, poor grounding, or a malfunction in the sensor's internal circuitry—even after MAF replacement.

Anonymous 2012-10-19 13:21

I'm researching a similar issue on my 2001 Chevrolet Tracker with a 2.5L engine and OBD-II code P0113—could someone clarify where the IAT sensor is located in that model? Would appreciate any guidance or links to diagrams.

Anonymous 2012-10-19 14:15

tony11 — please start a new topic for your question about the IAT sensor location on the 2001 Chevrolet Tracker. This keeps discussions focused and improves search visibility for users with similar issues.