Update on mystery problem.
First, a reminder of the issue below:
My car is a MK 4 Mondeo 2.0 Ghia 09 plate 108,000 miles approx. Car keeps jerking and cutting out after I've driven a few miles (between 1-10 miles) and throwing an Engine Malfunction warning. Also, sometimes it won't start again for 15 - 20 mins after. The car drives ok with no problems when not presenting with this issue; it also seems to be worse in warm/hot weather.
I took it to a local repair shop a few weeks back and they said the fault was with the throttle position sensor so they replaced that. However, that did not resolve the issue and the problem still remains. Another garage said they could not find any mechanical faults and suggested I use an Auto Electrician.
So, I have a new throttle position sensor, but the problem still remains and I'm still getting codes relating to a throttle/pedal position sensor problem. I have the codes relating to the issue from the garage and from my own OBD II scanner. Codes are as follows:
Code: P0121 - Throttle/Pedal Position Sensor/Switch A Circuit Range/Performance
Code: P0122 - Throttle/Pedal Position Sensor A Circuit Low Input
Code: P0221 - Throttle/Pedal Position Sensor/Switch B Circuit Range/Performance
Code: P0222 - Throttle/Pedal Position Sensor B Circuit Low Input
Code: P2135 - Throttle/Pedal Position Sensor/Switch A/B Voltage Correlation
Also getting a few other codes not related to this issue such as U codes for steering angle sensor module, air conditioning (not sure if this is relevant, but included it just in case)
I have spoken to one Auto Electrician and contacted a few others and am waiting for replies. The one I spoke to said it sounded like a wiring problem but could also be the ECU. Now, I know there is a significant difference in cost between repairing faulty wiring or connections and a replacement/repair for an ECU. Also, I believe it is rare for ECUs to fail? Is there any way of knowing if it is wiring or ECU as the Auto Electrician seemed keen to push the idea that it's an ECU problem (Also said he's really busy right now and seemed a little reluctant if honest). I ask this as I've been told certain garages just default to telling you its a faulty ECU when it isn't.
Can anyone advise as to how much this will cost. 1). For wiring repair. 2). Replacement or repair of ECU? Also, is a second hand ECU feasible?
Any advice/opinions on whether it's a wiring/connection problem or ECU problem really appreciated.
Many thanks
First, a reminder of the issue below:
My car is a MK 4 Mondeo 2.0 Ghia 09 plate 108,000 miles approx. Car keeps jerking and cutting out after I've driven a few miles (between 1-10 miles) and throwing an Engine Malfunction warning. Also, sometimes it won't start again for 15 - 20 mins after. The car drives ok with no problems when not presenting with this issue; it also seems to be worse in warm/hot weather.
I took it to a local repair shop a few weeks back and they said the fault was with the throttle position sensor so they replaced that. However, that did not resolve the issue and the problem still remains. Another garage said they could not find any mechanical faults and suggested I use an Auto Electrician.
So, I have a new throttle position sensor, but the problem still remains and I'm still getting codes relating to a throttle/pedal position sensor problem. I have the codes relating to the issue from the garage and from my own OBD II scanner. Codes are as follows:
Code: P0121 - Throttle/Pedal Position Sensor/Switch A Circuit Range/Performance
Code: P0122 - Throttle/Pedal Position Sensor A Circuit Low Input
Code: P0221 - Throttle/Pedal Position Sensor/Switch B Circuit Range/Performance
Code: P0222 - Throttle/Pedal Position Sensor B Circuit Low Input
Code: P2135 - Throttle/Pedal Position Sensor/Switch A/B Voltage Correlation
Also getting a few other codes not related to this issue such as U codes for steering angle sensor module, air conditioning (not sure if this is relevant, but included it just in case)
I have spoken to one Auto Electrician and contacted a few others and am waiting for replies. The one I spoke to said it sounded like a wiring problem but could also be the ECU. Now, I know there is a significant difference in cost between repairing faulty wiring or connections and a replacement/repair for an ECU. Also, I believe it is rare for ECUs to fail? Is there any way of knowing if it is wiring or ECU as the Auto Electrician seemed keen to push the idea that it's an ECU problem (Also said he's really busy right now and seemed a little reluctant if honest). I ask this as I've been told certain garages just default to telling you its a faulty ECU when it isn't.
Can anyone advise as to how much this will cost. 1). For wiring repair. 2). Replacement or repair of ECU? Also, is a second hand ECU feasible?
Any advice/opinions on whether it's a wiring/connection problem or ECU problem really appreciated.
Many thanks