Answer
Sep 07, 2025 - 08:17 PM
On your 2009 GMC Acadia, a crank-no-start with those codes suggests you may be dealing with both electrical and sensor-related issues.
The P0698 points to a low reference voltage problem on a sensor circuit, while P0122 indicates a throttle position sensor issue. The B0283 relates to an HVAC actuator circuit, which isn’t likely tied to the no-start, and C0242 is a traction control code that can pop up when other systems aren’t happy. The key here is that the engine control module isn’t getting proper sensor signals, likely due to a wiring fault, bad ground, or failed sensor. Since it will crank but not fire, I’d suggest starting with basics: check battery voltage and grounds, inspect wiring harnesses for damage or corrosion (especially near the throttle body), and test the throttle position sensor circuit. Fixing the low reference voltage problem will likely clear multiple codes and get you closer to solving the no-start.
The P0698 points to a low reference voltage problem on a sensor circuit, while P0122 indicates a throttle position sensor issue. The B0283 relates to an HVAC actuator circuit, which isn’t likely tied to the no-start, and C0242 is a traction control code that can pop up when other systems aren’t happy. The key here is that the engine control module isn’t getting proper sensor signals, likely due to a wiring fault, bad ground, or failed sensor. Since it will crank but not fire, I’d suggest starting with basics: check battery voltage and grounds, inspect wiring harnesses for damage or corrosion (especially near the throttle body), and test the throttle position sensor circuit. Fixing the low reference voltage problem will likely clear multiple codes and get you closer to solving the no-start.
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