Knowledge Hub
Decoded by engineers,
verified by technicians.
888 guides, repair insights and product knowledge from the iCarsoft Technical Team.
Tech Center & Insights
P2243 Code: O2 Reference Voltage B1S1 — Causes & Fix
P2243 means an open O2 reference voltage circuit on B1S1. Learn the causes, symptoms, and how to test the wide-band sensor with t…
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P0867 Code: Transmission Fluid Pressure — Fix Guide
P0867 means transmission fluid pressure is out of range. Learn the causes, symptoms, and how to read live pressure with the iCars…
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P0059 Code: O2 Heater Resistance B2S1 — Causes & Fix
P0059 means the Bank 2 Sensor 1 O2 heater resistance is out of range. Learn the causes, symptoms, and how to test it with the iCa…
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P2314 Code: Ignition Coil M Secondary Circuit — Fix
P2314 means an ignition coil M secondary circuit fault. Learn the causes, symptoms, and how to swap-test the coil and plug with t…
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P0331 Code: Knock Sensor 2 Range/Performance — Fix
P0331 means an implausible Bank 2 knock sensor signal. Learn the causes, symptoms, and how to test the sensor, wiring, and torque…
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P0177 Code: Fuel Composition Sensor — Causes & Fix
P0177 means an implausible flex-fuel composition sensor signal. Learn the causes, symptoms, and how to read live ethanol content …
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P063C Code: Internal Module Fuel Injector Enable — Fix
P063C is an internal PCM injector-enable fault. Learn why it's usually power/grounds — not a bad PCM — and how to fix it before r…
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P053A Code: PCV Heater Control Circuit/Open — Causes & Fix
P053A means an open in the PCV heater circuit. Learn the causes, why it matters in cold climates, and how to fix it before the PC…
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P2160 Code: Vehicle Speed Sensor "B" Circuit Low — Fix
P2160 signals low voltage from Vehicle Speed Sensor B. Learn the causes of speedo, shifting, and ABS issues, and how to fix it —…
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P0227 Code: Throttle/Pedal Position Sensor "C" Low — Fix
P0227 means low voltage from the throttle/pedal position "C" sensor. Learn the causes of limp mode, how to test wiring, and fix i…
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P0652 Code: Sensor Reference Voltage "B" Circuit Low Fix
P0652 signals low voltage on the "B" 5V reference circuit. Learn why it causes multiple sensor codes and how to trace a short to …
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P0699 Code: Sensor Reference Voltage "C" Circuit High Fix
P0699 means high voltage on the "C" 5V reference circuit. Learn why it triggers multiple sensor codes and how to trace the wiring…
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P064A Code: Fuel Pump Control Module — Causes & Fix
P064A points to a Fuel Pump Control Module fault. Learn the causes, why Ford connectors are often to blame, and how to fix hard s…
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P0143 Code: O2 Sensor Low Voltage (Bank 1, Sensor 3) Fix
P0143 means low voltage from O2 Sensor 3 on Bank 1. Learn the causes, why an exhaust leak is often to blame, and how to fix it be…
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Tech Center & Insights
P260F Code: EVAP System Monitoring Processor — Causes & Fix
P260F is an internal PCM fault that blocks the EVAP monitor — not a leak. Learn why it fails emissions and how a software reflas…
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P0689 Code: ECM/PCM Power Relay Sense Circuit Low — Fix
P0689 signals low voltage on the ECM/PCM power relay sense circuit. Learn causes, symptoms, and how to fix hard starts or stallin…
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P2504 Code: Charging System Voltage High — Causes & Fix
P2504 means your charging system voltage is too high (overcharge). Learn the causes, diagnostic steps, and repair costs — don't d…
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P0544 Code: EGT Sensor Circuit Bank 1 Sensor 1 — Diesel Fix
P0544 is an EGT sensor circuit fault on diesels. Fix promptly to avoid $2,500+ turbo/DPF damage. Common on Powerstroke, Duramax, …
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P0870 Code: Transmission Fluid Pressure Sensor C Circuit Fix Guide
P0870 means transmission pressure sensor circuit fault. Common on Chevy Silverado, Tahoe. Fix fluid first, sensor second — most c…
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P2762 Code: TCC Pressure Control Solenoid B Range/Performance Fix
P2762 indicates TCC pressure control solenoid fault. Start with fluid service — many cases resolved without expensive solenoid re…
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P0176 Code: Fuel Composition Sensor Circuit — Flex Fuel Fix Guide
P0176 is a flex fuel (E85) sensor circuit fault on FFV vehicles. Check Ford TSB for water intrusion — often a $0 fix instead of $…
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P2190 Code: System Too Rich at Idle Bank 2 — Causes &amp Fix
P2190 indicates rich fuel mixture on Bank 2 at idle. Common on V6/V8 engines. Compare bank-to-bank fuel trims to isolate the caus…
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P2174 Code: Throttle Actuator System — Sudden Low Airflow Fix
P2174 means sudden airflow drop detected by PCM. Most cases resolved by air filter, MAF cleaning, or throttle body service for un…
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P0626 Code: Generator Field/F Terminal Circuit High — Fix Guide
P0626 indicates alternator field control circuit fault. Critical to fix — overcharging can destroy electronics. Learn causes, dia…
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