Citroën C1 Fault Codes
You can find common Citroën C1 fault codes on this page that when clicked take you to a detailed description.
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Citroën C1 Recalls
When a car manufacturer detects a problem with a model they put out a recall notice and more often than not offer to fix the problem free of charge.
You can check to see if your Citroën C1 has any recall notices on our sister site AutoRecalls.co, sorted by model year.View Citroën C1 Recalls »
Common C1 Fault Codes
These are the most common C1 fault codes that people are searching for.
Catalyst System Efficiency Below Threshold (Bank 1)Learn More Fixes
Intake Camshaft Position Timing - Over-Advanced (Bank 1)Learn More Fixes
System Too Lean (Bank 1)Learn More Fixes
O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 2)Learn More
O2 Sensor Circuit High Voltage (Bank 1 Sensor 2)Learn More Fixes
Engine Coolant Temperature Circuit Range/Performance ProblemLearn More
O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)Learn More Fixes
O2 Sensor Circuit Slow Response (Bank 1 Sensor 2)Learn More
O2 Sensor Circuit Low Voltage (Bank 1 Sensor 2)Learn More Fixes
Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance ProblemLearn More Fixes
Transmission Indeterminate Failure (Failed to Neutral)Learn More
Power Supply Voltage Low VoltageLearn More
Variable Intake Air System Control Solenoid Valve CircuitLearn More
IDM Input Circuit Malfunction/ Ignition Coil Control Circuit High VoltageLearn More
Camshaft Position Sensor B Circuit MalfunctionLearn More
Fuel Rail/System Pressure - Too LowLearn More Fixes
Fuel Rail Pressure Sensor Circuit Low InputLearn More
Mass or Volume Air flow Circuit MalfunctionLearn More Fixes
Fuel System Leak Detected - Large LeakLearn More Fixes
Exhaust Gas Recirculation Sensor A CircuitLearn More
Crank / Cam Sensor Range / PerformanceLearn More
Exhaust Gas Recirculation Control Circuit LowLearn More
Exhaust Gas Recirculation Sensor A Circuit HighLearn More
SCP (J1850) Invalid or Missing Data for Primary IdLearn More
SCP (J1850) Invalid or Missing Data for External LampsLearn More
SCP (J1850) Invalid or Missing Data for Seat SwitchesLearn More
SCP (J1850) Invalid or Missing Data for Ignition Switch / StarterLearn More
Purge Flow Sensor Circuit High InputLearn More
A/C Refrigerant Temperature Circuit HighLearn More
Secondary Air Relief Solenoid Circuit MalfunctionLearn More
EGR Stepper Motor Malfunction - Circuit 2 (1.8L).Learn More Fixes
Evaporative Vac Solenoid Circuit MalfunctionLearn More
Ignition Coil A Primary Circuit MalfunctionLearn More
Manifold Temp. Sensor Circ. Open/Short to B+Learn More
Transmission Automatic Hall Effect Sensor Power Circuit Short To Battery / 4WD Low Switch Circuit ElectricalLearn More
Fuel Level Sensor B Intermittent/Bypass Line MonitorLearn More
Intake Camshaft Position Actuator Circuit / Open (Bank 1)Learn More Fixes
Intake Camshaft Position Timing - Over-Retarded (Bank 1)Learn More Fixes
Exhaust Camshaft Position Actuator Circuit / Open (Bank 1)Learn More Fixes
Exhaust Camshaft Position Timing - Over-Advanced (Bank 1)Learn More Fixes
Crankshaft Position Camshaft Position Correlation Bank 1 Sensor ALearn More Fixes
Crankshaft Position Camshaft Position Correlation Bank 1 Sensor BLearn More Fixes
Heated Oxygen Sensor (HO2S) Heater Control Circuit Bank 1 Sensor 2Learn More Fixes
Mass or Volume Air Flow Circuit Low Voltage InputLearn More Fixes
Intake Air Temperature Circuit High InputLearn More Fixes
Coolant Thermostat (Coolant Temp Below Thermostat Regulating Temperature)Learn More Fixes
O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1)Learn More Fixes
O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1)Learn More Fixes
O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)Learn More Fixes
System Too Rich (Bank 1)Learn More Fixes
System Too Rich (Bank 2)Learn More Fixes
Random/Multiple Cylinder Misfire DetectedLearn More Fixes
Cylinder 1 Misfire DetectedLearn More Fixes
Cylinder 2 Misfire DetectedLearn More Fixes
Cylinder 3 Misfire DetectedLearn More Fixes
Cylinder 4 Misfire DetectedLearn More Fixes
Cylinder 5 Misfire DetectedLearn More Fixes
Cylinder 6 Misfire DetectedLearn More Fixes
Knock Sensor 1 Circuit (Bank 2 or Single Sensor)Learn More Fixes
Knock Sensor 2 Circuit Low Input (Bank 2)Learn More Fixes
Crankshaft Position Sensor A Circuit MalfunctionLearn More Fixes
Camshaft Position Sensor Circuit Range/PerformanceLearn More Fixes
Exhaust Gas Recirculation Flow Insufficient DetectedLearn More Fixes
Catalyst System Efficiency Below Threshold (Bank 2)Learn More Fixes
Evaporative Emission Control System Incorrect Purge flowLearn More Fixes
Evaporative Emission Control System Leak DetectedLearn More Fixes
Evaporative Emission Control System Vent Control Circuit MalfunctionLearn More Fixes
Evaporative Emission Control System Vent Valve/Solenoid Circuit MalfunctionLearn More Fixes
System Gross Leak Evaporative EmissionLearn More Fixes
Evaporative Emissions System Small Leak DetectedLearn More Fixes
Fuel Level Sensor Circuit High InputLearn More Fixes
Evaporative Emission System High Purge FlowLearn More Fixes
Idle Control System RPM higher Than ExpectedLearn More Fixes
Transmission Control System MalfunctionLearn More Fixes
Post Catalyst Fuel Trim System Too Lean Bank 1Learn More Fixes
Post Catalyst Fuel Trim System Too Rich Bank 1Learn More Fixes
- Manufacturer: Citroën
About the C1
Rebadges as both the Peugeot 108 or Toyota Aygo, the C1 is a French car manufactured by Citroen.
Originally sold as either a 3-door hatchback or as a 5-door, the C1 had an impressive fuel economy of 68.9 mpg in its first generation.
Designed by Donato Coco, a car designer also known for the Mercedes W168, Ferrari 458, Ferrari F430, Ferrari 599XX, Ferrari California, Citroen Xsara Picasso, Citroen C3, Citroen C2, Citroen C4 and the Ocqueteau RC10; the C1 offered a trim range that included the Vibe, Rhythm, Code, Cool and the Airplay.
The latter had iPod connectivity, and iPod cradle and a free iPod Nano and colorful swirling patterns. 2009 saw a facelift that coincided with the Toyota Aygo and Peugeot 107, updates included a new front bumper, front grille and new colors.
Second-generation models were launched in 2014 and were shown at the Geneva Motor Show. A new model called the Airscape joined the line up which featured a folding canvas roof much like the classic Renault Twingo and the Fiat 500 convertible.
Following Euro NCAP safety tests, the C1 received four out of a potential five stars overall, with 80% awarded to adult safety and the same again for children.
Owners of the C1 commonly see the same faults occur with this vehicle after a certain age, these error codes can include:
- P0420 – Low efficiency from the catalyst system, this code suggests that the oxygen levels are too low and can result in a problem with the cars exhaust system.
- P0011 – The bank 1 intake camshaft is too advanced and can result in the retarding of the camshaft timing.
- P0171 – There is either not enough fuel or too much oxygen in the exhaust.
- P0161 – When there is an issue with the sensor heater circuit, this error code displays and it means that the oxygen sensor is not heating up to the necessary levels.
- P0138 – The sensor for bank one isn’t outputting a high enough voltage.