Ford Mustang: Common Codes & Fixes

Real-world diagnostic data for the Ford Mustang. These are the codes techs see most often. Tap any code for the full vehicle-specific fix and the exact part.

24 codes have specific fixes for the Ford Mustang

B1342 Mustang PCM faults are often triggered by aftermarket tuning. 2005-2016 · easy DIY · 30 min - 1 hour B1352 Mustang B1352 commonly appears after the steering column was disassembled for clockspring or tilt-lever work. 2005-2012 · moderate DIY · 30-45 min B1601 If B1601 appeared after a battery disconnect or PCM reset, the PATS module lost its key memory. 2005-2019 · moderate DIY · 30-45 min B1676 Mustang B1676 often appears with dim headlights or flickering dash lights. 2005-2014 · moderate DIY · 1-2 hours P0107 TMAP sensor (combined MAP/IAT) on top of intake manifold reads below expected voltage. 2005-2015 · Easy DIY · 20-30 min P0111 IAT sensor reading stuck/unresponsive during warm-up — typically the integrated IAT portion of the MAF sensor has failed. 2005-2014 · Easy DIY · 15-30 min P0124 TPS intermittent signal — clean or replace the electronic throttle body. 2005-2014 · Moderate DIY · 1-2 hr P0143 Bank 1 sensor 3 low — check for exhaust leaks ahead of the sensor and verify signal wire integrity. 2005-2012 · Easy DIY · 30-45 min P0150 Bank 2 sensor 1 (upstream, passenger side on most V8s) malfunction — replace with Motorcraft or Denso OEM. 2005-2014 · Easy DIY · 30-45 min P0160 Bank 2 downstream O2 shows no activity — replace downstream O2 sensor. 2004-2014 · Easy DIY · 30-45 min P0193 High input from the fuel rail pressure sensor means the signal voltage exceeds the expected maximum. 2005-2018 · easy DIY · 15-30 min P0230 The fuel pump primary circuit supplies power to the in-tank fuel pump through the fuel pump relay and fuel pump driver module (FPDM). 2005-2018 · easy DIY · 30 min - 1 hour P0231 Fuel pump secondary circuit low means the fuel pump feedback signal to the PCM is below the expected range. 2005-2018 · moderate DIY · 1-2 hours P0262 Cylinder 1 injector circuit high means excessive current draw or a short to power. 2005-2018 · moderate DIY · 30 min - 1 hour P0313 Check the fuel level sensor sending unit -- if it reads falsely low, the PCM will trigger P0313 thinking the tank is empty. 2006-2015 · moderate DIY · 2 hours P0391 Bank 2 cam sensor B circuit malfunction — replace the cam position sensor on the passenger side head. 2004-2014 · Moderate DIY · 45 min-1 hr P0463 The fuel level sender float arm in Mustangs gets corroded at the pivot point, causing it to stick in the full position. 2005-2015 · Moderate DIY · 2-3 hours P1131 P1131 on Ford = 'Lack of Upstream O2 Sensor Switch, Bank 1 Lean' -- the upstream O2 is reading lean constantly. 1996-2004 · easy DIY · 30 min P1150 On Mustang, P1150 is commonly the Bank 1 O2 sensor itself or a chafed wire near the exhaust manifold. 2005-2014 · Easy DIY · 45 min P1200 Newer Ford P1200 codes often trace to an injector with high impedance or a water-damaged PCM connector. 2005-2014 · Moderate DIY · 2-3 hours P1289 Mustang 4.6L P1289 is CHT sensor fault. 2005-2010 · moderate DIY · 45 min P2118 P2118 = throttle actuator motor circuit current range/performance. 2006-2015 · easy DIY · 30 min P2270 Check wiring harness near the downstream O2 for heat or rodent damage -- very common on trucks. 2005-2013 · moderate DIY · 1-2 hours U0645 Similar cluster issue on Mustang and Explorer -- the CAN gateway inside the cluster fails and the module stops responding. 2005-2014 · Advanced DIY · 2-3 hours

Frequently Asked Questions

What are the most common check engine light codes on a Ford Mustang?

The most commonly reported OBD-II codes for the Ford Mustang include B1342, B1352, B1601, B1676, P0107. Each code indicates a specific issue -- tap any code above for the full diagnostic breakdown.

How much does it cost to fix a check engine light on a Ford Mustang?

Repair costs vary by code. Many Ford Mustang fixes like gas cap replacement, sensor cleaning, or spark plug changes are under $50 in parts and can be done at home. More complex repairs like catalytic converter or transmission work can run $500-$2,000+ at a shop.

Can I drive my Ford Mustang with the check engine light on?

It depends on the code. A steady check engine light usually means you can drive short distances safely. A flashing check engine light means stop driving immediately -- continued driving can cause serious engine damage. Scan the code first to know what you are dealing with.

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