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2016 S-Max Limp Mode


Fraserja
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Hi all,

 

A strange issue has appeared on my car and I'm struggling to find much information online. It's a 2016 S-Max 2.0 TDCi 180, with 62k miles on the clock.

 

It has started going into limp mode when the engine is under high load, such as accelerating on a motorway/dual carriageway whilst going uphill. It does not always happen, it only happens intermittently. Upon switching the engine off, it will not usually restart on the first attempt (just cranks and cranks) but will start normally start fine on the second attempt.

 

It has stored the following codes from the most recent occurence - P0251 (Injection Pump Fuel Metering Control A, signal amplitude less than minimum) and  P0170 (Fuel Trim Bank 1). These are the only 2 codes stored.

 

I have done the obvious and replaced the fuel filter with a new genuine Ford one, and performed a full service as it was almost due anyway. 

 

I would be grateful if anyone could shed some light on this for me, or suggest some diagnostic tests that I can perform in order to narrow this down. Would an injector leak off test be worth performing? There are no other symptoms, the car runs well and drives great, and it starts and idles smoothly on a cold start. 

 

Many Thanks,

 

Fraser

 

 

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Hi Fraser,

Are you using FORScan to read the DTC's or a generic code reader ?

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Hi Unofix, 

 

I am indeed using Forscan to read DTCs. Please see the attached fault codes and freeze frames.

 

===PCM DTC P0170:00-68===
Code: P0170 - Fuel Trim Bank 1

Status: 
 - Previously Set DTC - Not Present at Time of Request
 - Malfunction Indicator Lamp is Off for this DTC
 - Test not complete

Module: Powertrain Control Module

 Freeze Frame  #1:
-EVENT_TIME: 191192015 s (Sun May 15 19:42:06 2022) - Event time
-TOTAL_DISTANCE: 118385 km - Total Distance
-MODULE_VOLTAGE: 14.3 V - Control Module Voltage
-OUTDOOR_TEMPERATURE: 16 °C - Outside temperature
-LOAD: 72.16 % - Calculated Load Value
-ECT: 101 °C - Engine coolant temperature
-MAP: 186.0 kPa - Manifold absolute pressure sensor
-RPM: 1943 1/min - Engine Revolutions Per Minute
-VSS: 111.0 km/h - Vehicle Speed
-IAT: 21 °C - Intake Air Temperature
-MAF: 53.16 g/s - Mass Air Flow
-BARO: 99.0 kPa - Barometric pressure
-VPWR: 14.26 V - Control Module Voltage
-AAT: 16 °C - Ambient Air Temperature
-APP_D: 33.33 % - Accelerator Pedal Position D
-APP_E: 33.33 % - Accelerator Pedal Position E
-FUEL_TIMING: -4.69 ° - Main injection timing relative to top dead center
-FUEL_RATE: 0.18 L/h - Engine Fuel Rate
-EOT: 108 °C - Engine oil Temperature
-FLI: 11.37 % - Fuel Level
===END PCM DTC P0170:00-68===

===PCM DTC P0251:21-68===
Code: P0251 - Injection Pump Fuel Metering Control A

Additional Fault Symptom:
 - Signal Amplitude Less Than Minimum

Status: 
 - Previously Set DTC - Not Present at Time of Request
 - Malfunction Indicator Lamp is Off for this DTC
 - Test not complete

Module: Powertrain Control Module

 Freeze Frame  #1:
-EVENT_TIME: 191192099 s (Sun May 15 19:43:30 2022) - Event time
-TOTAL_DISTANCE: 118388 km - Total Distance
-MODULE_VOLTAGE: 14.3 V - Control Module Voltage
-OUTDOOR_TEMPERATURE: 16 °C - Outside temperature
-LOAD: 96.08 % - Calculated Load Value
-ECT: 99 °C - Engine coolant temperature
-RPM: 1856 1/min - Engine Revolutions Per Minute
-VSS: 105.0 km/h - Vehicle Speed
-IAT: 21 °C - Intake Air Temperature
-MAF: 81.11 g/s - Mass Air Flow
-BARO: 99.0 kPa - Barometric pressure
-VPWR: 14.24 V - Control Module Voltage
-AAT: 16 °C - Ambient Air Temperature
-APP_D: 44.31 % - Accelerator Pedal Position D
-APP_E: 44.71 % - Accelerator Pedal Position E
-FUEL_TIMING: -1.23 ° - Main injection timing relative to top dead center
-FUEL_RATE: 0.32 L/h - Engine Fuel Rate
-EOT: 107 °C - Engine oil Temperature
-FLI: 10.98 % - Fuel Level
===END PCM DTC P0251:21-68===

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