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Home >> Audi >> 2014 >> A5 Prestige >> Repair and Diagnosis >> External Pages >> Different car >> Section 10 (1.8L - Turbo Engine Controls - Generic Scan Tool, Engine Code(S): AMB) >> ST - Generic Scan Tool >> Diagnostic Trouble Code (DTC) tables >> SAE P0xxx-DTCs >> Fuel and air ratios

Fuel and air ratios

WARNING: This page is about a different car, the 2006 Audi A4, 2005 Audi A4, 2004 Audi A4, 2003 Audi A4, and 2002 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.

Refer to: Bosch Motronic ME 7 OBD System Strategy; Comprehensive Components Monitoring

DTC Error Message Diagnostic Procedure Malfunction Criteria and Threshold Value Secondary Parameters with Enable Conditions Monitoring Time Length Frequency of checks, MIL Illum
P0010 A Camshaft Position Actuator Circuit Short to battery positive->5.2 6.0 V Short to ground-0.5 1.0 V Open circuit-5.0 8.8 mA Engine speed- 80 rpm 0.5 Sec
  • 2 DCY
P0011 A Camshaft Position Timing Over-Advanced or System Performance Adjustment angle->6 degrees Engine speed->520 rpm ECT->(-)44 - 143 degrees C Time after engine start-0 sec 1.0 sec per driving cycle
  • 2 DCY
P0012 A Camshaft Position Timing Over-Retarded Adjustment angle-16 degrees Engine speed->720 rpm ECT->(-)9.75 degrees C Time after engine start->10 sec 1.5 sec 2 driving cycles
P0030 HO2 Heater Control Circuit (Bank 1, Sensor 1) Open circuit-2.34 3.59 V Sensor heater-OFF Time after engine start->4 sec Sensor heater-Heated up 0.5 Sec
  • 2 DCY
P0031 HO2 Heater Control Circuit Low (Bank 1, Sensor 1) Short to ground 2.34V Sensor heater- OFF Time after engine start- >4 sec Sensor heater-Heated up 5 Sec
  • 2 DCY
P0032 HO2 Heater Control Circuit High (Bank 1, Sensor 1) Short to battery positive- 1% Sensor heater-ON Air mass flow-> 32 kg/h Sensor heater-Heated up 5 Sec
  • 2 DCY
P0036 HO2S Heater Control Circuit (Bank 1, Sensor 2), electrical fault. Open circuit-4.5 5.5 V Sensor heater-OFF Engine speed->80 rpm 0.5 Sec
  • 2 DCY
P0037 HO2S Heater Control Circuit Low (Bank 1, Sensor 2), electrical fault. Short to ground-3.0 V Sensor heater-OFF Engine speed- >80 rpm 5 Sec
  • 2 DCY
P0038 HO2S Heater Control Circuit High (Bank 1, Sensor 2), electrical fault. Short to Battery Positive 2.7 5.5 A Sensor heater-ON Engine speed->80 rpm 0.5 Sec
  • 2 DCY
P0102 Mass or Volume Air Flow Circuit Low Input Lower threshold map (depending on engine speed and throttle angle) Air mass: 3 159 kg/h Time after engine start-200 camshaft revolutions 2 Sec
  • 2 DCY
P0103 Mass or Volume Air Flow Circuit High Input (ULEV) Upper threshold map (depending on engine speed and throttle angle) Air mass: 50 710 kg/h Time after engine start-200 camshaft revolutions 2 Sec
  • 2 DCY
P0106 Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance Difference between altitude sensor and boost pressure - >200 mbar --- ---
  • 2 DCY
P0112 Intake Air Temperature Sensor 1 Circuit Low Short to ground 141.0 degrees C Engine cranking range-120 320 rpm 2 Sec
  • 2 DCY
P0113 Intake Air Temperature Sensor 1 Circuit High Short to battery positive (-) 45.75 degrees C Time after engine start-180 sec 2 Sec
  • 2 DCY
P0116 Engine Coolant Temperature Sensor Circuit Range/Performance (LEV)Signal change3 K K(ULEV)Signal range-3 K Engine temperature->105 degrees C Engine heated up: Vehicle speed range-0 80 mph Mass air flow->40 52 kg/h (depending on speed) Time required/freq.->10 sec/once and Engine cooling down: Vehicle speed range-40 80 mph mass air flow-28 52 kg/h (depending on speed) Time required/freq.->15 sec/once Engine temperature- >112.5 degrees C Engine heated up: Vehicle speed range-0 80 mph Mass air flow->40 52 kg/h (depending on speed) Time required/freq.->10 sec/once and Engine cooling down: Vehicle speed range-25 80 mph mass air flow-28 52 kg/h (depending on speed) Time required/freq.->15 sec/once >25 seconds/once per driving cycle 25 seconds 2 driving cycles 2 driving cycles
P0117 Engine Coolant Temperature Circuit Low (LEV) Short to ground ECT, >141°C (ULEV) Short to ground ECT, >141°C   2 Sec
  • 2 DCY
P0118 Engine Coolant Temperature Circuit High (LEV)Short to battery positive or open circuit- (-) 45.75 degrees C (ULEV)Short to battery positive- (-) 45.75 degrees C   2 sec 2 sec
  • 2 DCY
P0121 Throttle/Pedal Position Sensor A Circuit Range/Performance
  • Check the Throttle Position (TP) Sensor G79/Accelerator Pedal Position Sensor 2 G185. Refer to → Throttle Position (TP) Sensor G79/Accelerator Pedal Position Sensor 2 G185 , checking (Engine Code AMB)  .
 Not plausible signal: Comparison signal sensor vs- signal senor 2 and difference between signal 1 to calculated throttle angle > difference between signal 2 to calculated throttle angle->6.3% Engine speed->1,320 rpm 0.2 Sec
  • 2 DCY
P0122 Throttle/Pedal Position Sensor "A" Circuit Low Input
  • Check the Throttle Position (TP) Sensor G79/Accelerator Pedal Position Sensor 2 G185. Refer to → Throttle Position (TP) Sensor G79/Accelerator Pedal Position Sensor 2 G185 , checking (Engine Code AMB)  .
 Lower threshold- 0.18 V   0.14 Sec
  • 2 DCY
P0123 Throttle/Pedal Position Sensor "A" Circuit High Input
  • Check the Throttle Position (TP) Sensor G79/Accelerator Pedal Position Sensor 2 G185. Refer to → Throttle Position (TP) Sensor G79/Accelerator Pedal Position Sensor 2 G185 , checking (Engine Code AMB)  .
 Upper threshold > 4.63 V   0.14 Sec
  • 2 DCY
P0130 O2 Sensor Circuit (Bank 1, Sensor 1) Malfunction Gradient of O2 sensor signal, 2 V/ms Open circuit or no activity, Front O2 sensed l 0.995-1.005 Internal voltage high (ASIC) 3.7-4.8 V Internal voltage high (ASIC) >4.8 V Comparison signal front to rear sensor, Front O2 sensed lean l>1.04 and rear O2 signal >0.7 V Or Front O2 sensed rich l 0.96 and rear O2 signal >0.3 V Time after engine start, >25 Sec Exhaust gas temp, >200°C Load change, 3% segment Sensor heater, active, Sensor, heated up Time after engine start, >25 Sec Air mass flow, >24 kg/h Rear o2 signal, >0.7 or 0.3 V Fuel cut off, not active Oxygen sensor, heated up Fuel cut off, not active Oxygen sensor, heated up l control, closed loop 0.13 seconds 5-25 seconds 10 seconds at low fuel level:6-10 Sec 2 sec 2-25 sec
  • 2 DCY
P0133 O2 Sensor Circuit Slow Response (Bank 1, Sensor 1) Amplitude ration between sensor signal and stored value-0.7 Engine speed range-1,720 3,500 rpm Engine load range-33 52% Load change-4%/segment Fuel control-Closed loop 40 sec, once per driving cycle
  • 2 DCY
P0135 O2 Sensor Heater Circuit No activity after engine start-1% No activity after fuel cut off- FRONT o2 sensor voltage-. 3 V Sensor heater-ON Air mass flow->32 kg/h Sensor heater-Heated up Time after engine start->70 sec Sensor heater-ON Catalyst temperature-300°C P0133-No fault 20 sec, once per driving cycle 3 sec
  • 2 DCY
P0136 O2 Sensor Circuit (Bank 1, Sensor 2) (LEV) Open circuit- 400 500 mV Sensor heated up-After 100 sec Catalyst temperature-> 50°C 600 Sec
  • 2 DCY
P0137 O2 Sensor Circuit Low Voltage (Bank 1, Sensor 2) (ULEV) Short circuit- 60 mV (LEV) Short circuit 60mV Sensor heated up- After 100 sec Catalyst temperature- >320°C Engine temperature @ engine OFF- >60°C Engine temperature @ engine start- 40°C Sensor heated up- After 100 sec Catalyst temperature- >320°C Engine temperature @ engine OFF- >60°C Engine temperature @ engine start- 40°C 100 sec at low fuel level: 700 sec 90 Sec at low fuel level: 700. Sec
  • 2 DCY
P0138 O2 Circuit High Voltage (Bank 1, Sensor 2) (ULEV) Short to battery +>1.3 V (LEV) Short to battery +> 1.3 V Sensor heated up-After 100 sec. Catalyst temperature- >320°C Sensor heated up-After 100 sec. Catalyst temperature- >50°C 5 Sec
  • 2 DCY
P0139 O2 Sensor Circuit Slow Response (Bank 1, Sensor 2) (ULEV)Sensor signal not active-Signal output is oscillating at reference value 0.608 V (LEV)Signal output is oscillating at reference value 0.608 V Intake air mass-24 120kg/h Rear O2 sensor readiness- >30 sec Rear o2 sensor heater and electrical check-No DTC Catalyst temperature->390°C Fuel cut off-Not active Intake air mass-20 120kg/h Rear O2 sensor readiness- >30 sec Rear o2 sensor heater and electrical check-No DTC Catalyst temperature- >375°C Fuel cut off-Not active 100 Sec 100 Sec
  • 2 DCY
P0140 O2 Sensor Circuit No Activity Detected (Bank 1, Sensor 2) ULEV) Open sensor or no activity-400 500 mV (LEV) no activity-400 500 mV Sensor heated up-After 100 sec Catalyst temperature- 320°C Sensor heated up-After 100 sec Catalyst temperature- >50°C 600 Sec 600 Sec
  • 2 DCY
P0141 O2 Sensor Heater Circuit (Bank 1, Sensor 2), electrical fault. (ULEV) Out of range, 0.5-38 Ω (Depending on catalyst temp.) (LEV) Out of range, .8-30 Ω (Depending on catalyst temp.) Catalyst temperature,400-580°C Sensor heater, on Sensor heater, heated up IAT, >-7°C Catalyst temperature,300-600°C Sensor heater, on Sensor heater, heated up IAT, >-7°C 6 Sec 30 Sec
  • 2 DCY
P0171 System Too Lean
  • Check the intake system for leaks (false air).
  • Check the exhaust system for proper seal.
  • Check the vacuum lines for leaks
 (additive)System too RICH->(-) 8% within adaptive range (multiplicative)System too RICH- > (-)23% within adaptive range Lambda controller-Closed loop Engine speed-1,000 rpm Mass air-22 kg/h Fuel adoption-Active and stable Purge valve-CLOSED ULEV: ECT or subst. Temperature->70 or >80°C LEV: ECT or subst. Temperature->60 70°C Lambda controller engine- CLOSED loop Engine load-12 60 % Mass air-34 450 kg/h Fuel adoption-Active and stable Purge valve-CLOSED Engine speed-0 4,800 U/min ULEV: ECT or subst. Temperature->70 or >80°C LEV: ECT or subst. Temperature->60 70°C 50 Sec 50 Sec
  • 2 DCY
P0172 System Too Rich (additive)System too RICH->(-) 8% within adaptive range (multiplicative)System too RICH-> (-)23% within adaptive range Lambda controller-Closed loop Engine speed-1,000 rpm Mass air-22 kg/h Fuel adoption-Active and stable Purge valve-CLOSED ULEV: ECT or subst. Temperature->70 or >80°C LEV: ECT or subst. Temperature->60 70°C Lambda controller engine- CLOSED loop Engine load-12 60 % Mass air-34 450 kg/h Fuel adoption-Active and stable Purge valve-CLOSED Engine speed-0 4,800 U/min ULEV: ECT or subst. Temperature->70 or >80°C LEV: ECT or subst. Temperature->60 70°C 50 Sec 50 Sec
  • 2 DCY
P0201 Injector Circuit/Open - Cylinder 1 Open circuit-4.5 5.5 V while injection valve is OFF Engine speed-80 rpm 0.5 Sec
  • 2 DCY
P0202 Injector Circuit/Open - Cylinder 2 Open circuit-4.5 5.5 V while injection valve is OFF Engine speed-80 rpm +0.5 Sec
  • 2 DCY
P0203 Injector Circuit/Open - Cylinder 3 Open circuit-4.5 5.5 V while injection valve is OFF Engine speed-80 rpm +0.5 Sec
  • 2 DCY
P0204 Injector Circuit/Open - Cylinder 4 Open circuit-4.5 5.5 V while injection valve is OFF Engine speed-80 rpm +0.5 Sec
  • 2 DCY
P0221 Throttle/Pedal Position Sensor/Switch B Circuit Range/Performance
  • Check the Throttle Position (TP) Sensor G79/Accelerator Pedal Position Sensor 2 G185. Refer to → Throttle Position (TP) Sensor G79/Accelerator Pedal Position Sensor 2 G185 , checking (Engine Code AMB)  .
 Not plausible signal: Comparison signal sensor 2 vs- signal sensor 1 and difference between signal 2 to calculated throttle angle > difference between signal 1 to calculated throttle angle- >6.3% Engine speed->1,320 rpm 0.2 Sec
  • 2 DCY
P0222 Throttle/Pedal Position Sensor/Switch B Circuit Low
  • Check the Throttle Position (TP) Sensor G79/Accelerator Pedal Position Sensor 2 G185. Refer to → Throttle Position (TP) Sensor G79/Accelerator Pedal Position Sensor 2 G185 , checking (Engine Code AMB)  .
 Lower threshold-0.16 V Engine speed->1,320 rpm 0.14 Sec
  • 2 DCY
P0223 Throttle/Pedal Position Sensor/Switch B Circuit High
  • Check the Throttle Position (TP) Sensor G79/Accelerator Pedal Position Sensor 2 G185. Refer to → Throttle Position (TP) Sensor G79/Accelerator Pedal Position Sensor 2 G185 , checking (Engine Code AMB)  .
 Upper threshold-4.8 V   0.14 Sec
  • 2 DCY
P0230 Fuel Pump primary Circuit
  • Check Fuel Delivery System
→ Fuel Pump (FP) delivery quantity, checking 		 Short to battery positive- 0.6 1.2 A Short to ground- 3.0 V Open circuit-4.5 5.5 V Engine speed- >80 Rpm 0.5 Sec
  • 2 DCY
P0234 Turbocharger/Supercharger Overboost Condition (Only ULEV) Actual pressure higher than model pressure-400 mbar Engine speed- >2,400 - 3,000 Rpm 1.0 Sec
  • 2 DCY
P0237 Turbocharger/Supercharger Boost Sensor "A" Range/Performance Short to ground- >0.14 V   0.8 Sec
  • 2 DCY
P0238 Turbocharger/Supercharger Boost Sensor "A" Circuit High Short to battery positive- >4.88 V --- 0.8 Sec
  • 2 DCY
P0243 Turbocharger/Supercharger Wastegate Solenoid "A" (Only ULEV) Open circuit- 4.5 5.5 V Valve-OFF Engine speed->80 rpm 0.5 Sec
  • 2 DCY
P0245 Turbocharger/Supercharger Wastegate Solenoid "A" Low (Only ULEV) Short to ground- 3.0 V Valve-ON Engine speed->80 rpm 0.5 Sec
  • 2 DCY
P0246 Turbocharger/Supercharger Wastegate Solenoid "A" High Only ULEV) Short to battery positive-2.2 4.0 A Valve-OFF Engine speed->80 rpm 0.5 Sec
  • 2 DCY
P0261 Cylinder 1 Injector Circuit Low Short to ground- 3.0 V while injection valve is OFF Engine speed-80 rpm 0.5 Sec
  • 2 DCY
P0262 Cylinder 1 Injector Circuit High Short to battery positive- 2.2 4.0 A while injection pump is ON Engine speed-> 80 rpm 0.5 Sec
  • 2 DCY
P0264 Cylinder 2 Injector Circuit Low Short to ground 3.0 V while injection valve is OFF Engine speed-80 rpm 0.5 Sec
  • 2 DCY
P0265 Cylinder 2 Injector Circuit High Short to battery positive- 2.2 4.0 Amps while injection pump is ON Engine speed-80 rpm 0.5 Sec
  • 2 DCY
P0267 Cylinder 3 Injector Circuit Low Short to ground- 3.0 Volts while injection valve is OFF Engine speed-80 rpm 0.5 Sec
  • 2 DCY
P0268 Cylinder 3 Injector Circuit High Short to battery positive- 2.2 4.0 A while injection pump is ON Engine speed-> 80 rpm 0.5 Sec
  • 2 DCY
P0270 Cylinder 4 Injector Circuit Low Short to ground- 3.0 V while injection valve is OFF Engine speed- 80 rpm 0.5 Sec
  • 2 DCY
P0271 Cylinder 4 Injector Circuit High Short to battery positive- 2.2 4.0 A while injection pump is ON Engine speed- > 80 rpm 0.5 Sec
  • 2 DCY
P0299 Turbocharger/Supercharger Underboost (Only ULEV) Actual pressure lower than model pressure-200 mbar Engine speed->2,400 3,000 Rpm Target charge->p amb (+)450 hPa 1 Sec
  • 2 DCY
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