Articles
Real fault-code cases
Each case starts from one real diagnosis run in WrenchLane: the car, the fault codes, the causes it ranked and the checks worth doing first. Workshop and customer details are left out.
275 cases · Page 10 of 12
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Diagnosing Six Electrical Codes on a 2006 SAAB 9-3
A 2006 SAAB 9-3 presented with mixed circuit codes and no AC, but working fans. See how we traced six different DTCs to a single electrical distribution fault. -
Diagnosing P000100 and Stalling Under Load on a 2009 Volvo V70 II
A detailed case study on diagnosing a P000100 fault code and stalling under load on a 2009 Volvo V70 II. Explore the ranked causes and testing steps. -
Diagnosing P008762 on a 2012 Ford Focus III
Step-by-step diagnostic breakdown for a P008762 low fuel rail pressure code on a 2012 Ford Focus III, covering the LPFP, HPFP, camshaft, and sensors. -
Diagnosing P008791 and Engine Knock on a Mercedes W176
A diagnostic case study of a 2012 Mercedes A-Class (W176) presenting with a P008791 low fuel pressure code, engine knock, and power loss on acceleration. -
Diagnosing P025113 on a 2012 Ford Focus III
Step-by-step diagnostic breakdown of fault code P025113 on a 2012 Ford Focus III, covering the fuel volume control valve, harness faults, and HPFP wear. -
Diagnosing P0380 and High Fuel Consumption on a 2012 Renault Megane
A diagnostic breakdown of how a P0380 glow plug circuit code ties into high fuel consumption on a 2012 Renault Megane III Coupé. -
Diagnosing a 1500 RPM High Idle and P0507 on a Honda Accord
A step-by-step look at diagnosing a P0507 code and a 1500 RPM high idle on a 2012 Honda Accord, from dirty throttle bodies to missed relearn procedures. -
Diagnosing a Silent P0703 on a 2022 Chevrolet Equinox
Explore a real diagnostic case of a P0703 code on a 2022 Chevrolet Equinox. Learn how secondary brake circuits trigger faults before symptoms appear. -
Diagnosing P073E on a 2018 KIA CEED III
A complete diagnostic path for a 2018 KIA CEE'D III with a P073E fault code and no reverse gear, covering actuator motors, sensors, and fluid checks. -
Diagnosing P2192 and Sluggish Performance on a Kia Venga
Explore a real diagnostic case on a 2010 Kia Venga with a P2192 code and sluggish performance. Discover how to test the MAF sensor, injectors, and EVAP. -
Diagnosing P24C6 on a 2019 Ford Tourneo Custom
A detailed look at diagnosing a P24C6 fault code on a 2019 Ford Tourneo Custom, covering PM sensor failures, wiring issues, and exhaust leaks. -
Resolving AdBlue Code P2BA9FD on a Mercedes V-Class
A step-by-step diagnostic breakdown of AdBlue fault code P2BA9FD on a 2014 Mercedes V-Class, covering fluid quality, dosing valves, and NOx sensors. -
Diagnosing P2118 and Missing +BM Voltage on a Toyota
A close look at diagnosing a 2008 Toyota Avensis with a P2118 fault code and missing +BM voltage, tracing faults from the ETCS fuse to the throttle actuator. -
Diagnosing a U2105 Network Failure on a 2007 Opel Vectra C
A step-by-step diagnostic breakdown of a 2007 Opel Vectra C with a U2105 fault code, a crank/no-start condition, and an 'F' showing on the center display. -
Diagnosing a U2142 Code on a 2010 Saab 9-3
A step-by-step diagnostic breakdown of a U2142 code (Yaw Rate Sensor Missing on Bus) on a 2010 Saab 9-3, exploring sensor faults and CAN network issues. -
Diagnosing Shifting Fault Codes on a 2014 FIAT 500L
Learn how to diagnose P0808 and P1C9B transmission high signal faults on a 2014 FIAT 500L, focusing on wiring harness and ground connection testing. -
Diagnosing a Ford Ranger P0767 and Harsh 1-3 Shifts
A complete diagnostic breakdown of a 2018 Ford Ranger with a P0767 code and harsh 1-3 shifts. Discover why fluid and hydraulics outrank electrical faults. -
Diagnosing a Solitary P0170 on a 2005 Kia Sportage II
When a 2005 Kia Sportage II throws a solitary P0170 fuel trim code, the diagnostic path can branch wildly. See how we structure the testing order. -
Diagnosing Oil in the Cooling System and P0090F on a 2019 Mercedes Vito
A real diagnostic case study of a 2019 Mercedes Vito presenting with oil in the cooling system alongside fault codes P30093, P0090F, and P30083D. -
Resolving P030273 and DPF Codes on a 2016 Mercedes Vito
A 2016 Mercedes Vito shows DPF fault codes P246B09 and P246392 alongside a cylinder misfire. Learn how to diagnose the root cause and save bay time. -
Diagnosing Limp Mode on a 2006 Mercedes C-Class
A concrete look at diagnosing a 2006 Mercedes C-Class stuck in second gear, covering conductor plate failure, fluid wicking, and isolating unrelated fault codes. -
Diagnosing a P0471 Code on a 2015 Nissan Navara
A 2015 Nissan Navara NP300 II presented with a P0471 code and exhaust fumes in the cabin. We break down the diagnostic path for this specific vehicle fault. -
Opel Insignia P2176: Throttle Body Idle Position Fault
Diagnosing a P2176 fault code on a 2013 Opel Insignia. Step-by-step analysis of throttle body idle position relearning, carbon buildup, and sensor failure. -
Diagnosing a Peugeot 308 P1632 Charging Fault
A 2017 Peugeot 308 presented with code P1632, a flashing battery light, and a hard stall. See the step-by-step diagnostic path for this charging issue.