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Fault codes

Every code, decoded for your car.

Look up any diagnostic trouble code and see what it means on a Boxster or Cayman — the likely cause, the system it touches, and which generations it applies to.

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Common Boxster & Cayman codes
50 shown
000401
Gateway — high-speed bus power-on reset (benign)
Informational fault logged by the central gateway (CAN/CAN-Gateway): the high-speed CAN bus (HSB) pe…
0981→89020E
Front luggage/engine-compartment light — defective
Porsche body-module fault stored in the front Body Control Module (BCM), not the engine ECU. The fro…
8981→P000A
"A" Camshaft Position Slow Response (Bank 1)
Variable valve timing (VarioCam) fault: during a commanded camshaft phase change, the actual positio…
Powertrain981→P000B
"B" Camshaft Position Slow Response (Bank 1)
Variable valve timing (VarioCam) fault: during a commanded camshaft phase change, the actual positio…
Powertrain981→P000C
"A" Camshaft Position Slow Response (Bank 2)
Variable valve timing (VarioCam) fault: during a commanded camshaft phase change, the actual positio…
Powertrain981→P000D
"B" Camshaft Position Slow Response (Bank 2)
Variable valve timing (VarioCam) fault: during a commanded camshaft phase change, the actual positio…
Powertrain981→P0010
"A" Camshaft Position Actuator Circuit (Bank 1)
The DME detected an electrical fault in the Bank 1 intake camshaft adjuster (VarioCam oil-control so…
Powertrain981→P0011
"A" Camshaft Position Timing Over-Advanced or System Performance (Bank 1)
Bank 1 camshaft timing is more advanced than commanded — a mechanical/hydraulic VarioCam performance…
Powertrain981→P0012
"A" Camshaft Position Timing Over-Retarded (Bank 1)
Bank 1 camshaft timing is more retarded than commanded — a VarioCam performance fault.
Powertrain981→P0013
"B" Camshaft Position Actuator Circuit (Bank 1)
Electrical fault in the Bank 1 exhaust camshaft adjuster (oil-control solenoid) circuit.
Powertrain981→P0014
"B" Camshaft Position Timing Over-Advanced (Bank 1)
Bank 1 exhaust camshaft timing over-advanced — a VarioCam performance fault.
Powertrain981→P0016
Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A)
The crankshaft and camshaft position signals are out of correlation on Bank 1 — possible cam-timing …
Powertrain981→P0017
Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor B)
Crank/cam correlation fault on Bank 1, exhaust-cam sensor.
Powertrain981→P0018
Crankshaft Position - Camshaft Position Correlation (Bank 2 Sensor A)
Crank/cam correlation fault on Bank 2, intake-cam sensor.
Powertrain981→P0019
Crankshaft Position - Camshaft Position Correlation (Bank 2 Sensor B)
Crank/cam correlation fault on Bank 2, exhaust-cam sensor.
Powertrain981→P0020
"A" Camshaft Position Actuator Circuit (Bank 2)
Same as P0010 but for Bank 2 (cylinders 4-6) intake camshaft adjuster circuit.
Powertrain981→P0021
"A" Camshaft Position Timing Over-Advanced or System Performance (Bank 2)
Bank 2 cam timing over-advanced / VarioCam performance fault. On Porsche flat-sixes a persistent P00…
Powertrain981→P0022
"A" Camshaft Position Timing Over-Retarded (Bank 2)
Bank 2 camshaft timing is more retarded than commanded — a VarioCam performance fault.
Powertrain981→P0023
"B" Camshaft Position Actuator Circuit (Bank 2)
Electrical fault in the Bank 2 exhaust camshaft adjuster circuit.
Powertrain981→P0024
"B" Camshaft Position Timing Over-Advanced (Bank 2)
Bank 2 exhaust camshaft timing over-advanced — a VarioCam performance fault.
Powertrain981→P0030
HO2S Heater Control Circuit (Bank 1 Sensor 1)
Fault in the heater control circuit for the upstream Bank 1 oxygen sensor.
Powertrain981→P0031
HO2S Heater Control Circuit Low (Bank 1 Sensor 1)
Upstream Bank 1 O2 sensor heater circuit voltage low.
Powertrain981→P0032
HO2S Heater Control Circuit High (Bank 1 Sensor 1)
Upstream Bank 1 O2 sensor heater circuit voltage high.
Powertrain981→P0036
HO2S Heater Control Circuit (Bank 1 Sensor 2)
Fault in the heater control circuit for the downstream Bank 1 oxygen sensor.
Powertrain981→P0037
HO2S Heater Control Circuit Low (Bank 1 Sensor 2)
Downstream Bank 1 O2 sensor heater circuit voltage low.
Powertrain981→P0038
HO2S Heater Control Circuit High (Bank 1 Sensor 2)
Downstream Bank 1 O2 sensor heater circuit voltage high.
Powertrain981→P0050
HO2S Heater Control Circuit (Bank 2 Sensor 1)
Fault in the heater control circuit for the upstream Bank 2 oxygen sensor.
Powertrain981→P0051
HO2S Heater Control Circuit Low (Bank 2 Sensor 1)
Upstream Bank 2 O2 sensor heater circuit voltage low.
Powertrain981→P0052
HO2S Heater Control Circuit High (Bank 2 Sensor 1)
Upstream Bank 2 O2 sensor heater circuit voltage high.
Powertrain981→P0056
HO2S Heater Control Circuit (Bank 2 Sensor 2)
Fault in the heater control circuit for the downstream Bank 2 oxygen sensor.
Powertrain981→P0087
Fuel Rail/System Pressure Too Low
Fuel rail/system pressure is below the expected level — on DFI engines this points to the high-press…
Powertrain981→P0088
Fuel Rail/System Pressure Too High
Fuel rail/system pressure is above the expected level on the DFI system.
Powertrain981→P0089
Fuel Pressure Regulator 1 Performance
The fuel pressure regulator/metering valve is not controlling rail pressure as expected.
Powertrain981→P0100
Mass or Volume Air Flow Circuit Malfunction
General fault in the mass air flow (MAF) sensor circuit.
Powertrain981→P0101
MAF Sensor Circuit Range/Performance
The MAF signal is out of the expected range relative to other engine data.
Powertrain981→P0102
MAF Sensor Circuit Low Input
The MAF signal voltage/frequency is too low.
Powertrain981→P0103
Mass or Volume Air Flow Circuit High Input
The MAF signal voltage/frequency is too high.
Powertrain981→P0104
Mass or Volume Air Flow Circuit Intermittent
Intermittent fault in the MAF sensor circuit.
Powertrain981→P0105
Manifold Absolute Pressure/Barometric Pressure Circuit Malfunction
General fault in the MAP/barometric pressure sensor circuit.
Powertrain981→P0106
MAP/Barometric Pressure Sensor Range/Performance
The manifold absolute pressure sensor reading is implausible. The 981 uses a MAP sensor in conjuncti…
Powertrain981→P0107
Manifold Absolute Pressure/Barometric Pressure Circuit Low Input
MAP/baro sensor signal voltage is too low.
Powertrain981→P0108
Manifold Absolute Pressure/Barometric Pressure Circuit High Input
MAP/baro sensor signal voltage is too high.
Powertrain981→P0110
Intake Air Temperature Sensor Circuit Malfunction
General fault in the intake air temperature (IAT) sensor circuit. IAT is typically integrated within…
Powertrain981→P0111
Intake Air Temperature Sensor Circuit Range/Performance
The IAT signal is implausible relative to other data.
Powertrain981→P0112
Intake Air Temperature Sensor Circuit Low Input
The IAT signal is stuck low. IAT is typically integrated within the MAF on the 981.
Powertrain981→P0113
Intake Air Temperature Sensor Circuit High Input
The IAT signal is stuck high. IAT is typically integrated within the MAF on the 981.
Powertrain981→P0114
Intake Air Temperature Sensor Circuit Intermittent
Intermittent fault in the IAT sensor circuit.
Powertrain981→P0115
Engine Coolant Temperature Circuit Malfunction
General fault in the engine coolant temperature (ECT) sensor circuit.
Powertrain981→P0116
Engine Coolant Temperature Sensor Range/Performance
The ECT signal is implausible relative to other data.
Powertrain981→P0117
ECT Sensor Circuit Low Input
The coolant temperature signal is stuck low (reads too hot / short).
Powertrain981→

Showing indexed codes for the Boxster & Cayman — 100 per generation, scoped to your exact variant inside the garage.