GMC Terrain: Common Codes & Fixes

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

16 codes have specific fixes for the GMC Terrain
C0035 The wheel speed sensor on the Equinox/Terrain is integrated into the wheel hub assembly. 2008-2017 · moderate DIY · 1-2 hours C0040 Right front hub assembly replacement required -- the speed sensor is integrated into the hub. 2008-2017 · moderate DIY · 1-2 hours C0045 Rear wheel speed sensor on the Equinox is built into the rear wheel hub assembly. 2008-2017 · moderate DIY · 1-2 hours C0300 The rear speed sensor on AWD Equinox/Terrain is part of the rear differential assembly. 2008-2017 · easy DIY · 30 min - 1 hour P0011 Intake cam actuator solenoid fails or gets clogged with sludge. 2012-2019 · Easy DIY · 0.5 hour P0012 Intake cam timing over-retarded on the Ecotec 2.4L. 2012-2019 · Advanced DIY · 4-6 hours P0014 Exhaust camshaft position actuator timing is over-advanced. 2012-2019 · Advanced DIY · 4-6 hours P0016 Cam-crank correlation error on the Ecotec 2.4L means the timing chain has jumped or stretched significantly. 2012-2019 · Advanced DIY · 4-6 hours P0171 PCV diaphragm in the valve cover fails and causes a lean condition. 2010-2019 · moderate DIY · 1 hour P0336 CKP sensor signal is irregular -- often caused by timing chain stretch changing the crank-to-cam relationship. 2008-2019 · Easy (sensor), Advanced (chain) DIY · 30 min (sensor), 4-6 hours (chain) P0340 Timing chain stretch causes erratic cam sensor readings on the Ecotec 2.4L. 2012-2019 · hard DIY · 4-6 hours P0341 Timing chain stretch is the #1 cause of P0341 on the Ecotec 2.4L. 2012-2019 · hard DIY · 4-6 hours P0449 The EVAP vent valve connector corrodes and loses connection. 2010-2019 · easy DIY · 30 min P0617 Internally failed starter relay stuck closed. 2010-2016 · easy DIY · 20 min P062F GM P062F is the infamous internal EEPROM error. 2010-2015 · easy (need dealer) DIY · 1 hour at dealer P0700 P0700 on GM vehicles often accompanies P0717 or P0776. 2010-2019 · easy (fluid), hard (internal repair) DIY · 30 min (fluid change)

Frequently Asked Questions

What are the most common check engine light codes on a GMC Terrain?

The most commonly reported OBD-II codes for the GMC Terrain include C0035, C0040, C0045, C0300, P0011. 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 GMC Terrain?

Repair costs vary by code. Many GMC Terrain 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 GMC Terrain 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.

Explore More

All vehicle fixes | Browse all codes | Codes by make