Aston Martin Bulldog C3378 Engine Trouble Code
What is Aston Martin Bulldog C3378?
With Aston Martin Bulldog C3378, you may drive for several weeks with a malfunctioning MAF sensor, but expect decreased fuel economy and eventual stalling. Shop replacement costs $240–$400 depending on vehicle. The labour is straightforward, with most cost from the part itself.
C3378 on the Aston Martin Bulldog
The turbocharged variants of the Aston Martin Bulldog are more likely to generate C3378 as boost-related over-fuelling trips the ECU threshold. Inspect the intercooler hoses for micro-cracks that allow unmetered air into the intake stream.
Code Information
| Code Type: | OBD-II Chassis (C) Trouble Code |
| System: | Chassis |
| Vehicle: | Aston Martin Bulldog |
| Brand: | Aston |
| Model: | Martin Bulldog |
| Code: | C3378 |
C3378 Aston Martin Bulldog Symptoms
Check Engine Light
Illuminated Aston Martin Bulldog dashboard warning
Engine Stalling
Engine stops unexpectedly or misfires
Performance Issues
Reduced power or acceleration on the Aston Martin Bulldog
Starting Problems
Difficulty starting the engine
Poor Fuel Economy
Increased fuel consumption on the Aston Martin Bulldog
Increased Emissions
Failed emissions test due to C3378
C3378 Code Structure
Understanding what each digit means in the C3378 chassis trouble code:
| C | 3 | 3 | 7 | 8 |
|---|---|---|---|---|
| Chassis Code | Ignition System Or Misfire | Throttle/Pedal Position Sensor/Switch A Circuit Intermittent | Cylinder 10 Contribution/Balance Fault | Clutch Position Sensor Circuit Malfunction |
How to Fix Aston Martin Bulldog C3378
Diagnostic Steps:
Poor running symptoms align with MAP sensor malfunction. In some cases, a faulty MAP sensor will not trigger a code. The issue may represent separate wiring concerns requiring individual diagnosis.
Repair Solution:
Verify all electrical connections are clean and tight. Check for damaged wiring, especially in high-heat or high-vibration areas. Use manufacturer wiring diagrams for accurate diagnosis.
Technical Notes:
C3378 on electronically controlled automatic transmissions relates to shift solenoid operation. The solenoid actuates hydraulic circuits controlling clutches or bands for gear changes.
Aston Martin Bulldog C3378 Repair Cost
Torque converter clutch solenoid replacement on the Aston Martin Bulldog — relevant for owners who tow regularly — costs $280–$480. A full transmission fluid change ($120–$160) at the same service is recommended because contaminated fluid accelerates solenoid wear.
C3378 Description
C3378 engine trouble code is related to Clutch Position Sensor Circuit Malfunction.
Main Cause
The primary reason for C3378 OBD-II Engine Trouble Code is: Throttle/Pedal Position Sensor/Switch A Circuit Intermittent.
Common C3378 Misdiagnosis on the Aston Martin Bulldog
The Aston Martin Bulldog is frequently taken to workshops for a C3378 fault where the technician replaces the throttle position sensor (TPS). In a significant proportion of cases, the root cause is a loose or cracked vacuum hose downstream of the throttle body that should have been found in a basic visual inspection.
DIY Repair Guide: C3378 on Aston Martin Bulldog
Replacing the oxygen sensor on the Aston Martin Bulldog requires an O2 sensor socket (22mm or 7/8") and penetrating oil applied 24 hours in advance. On vehicles over five years old, the sensor threads often corrode into the bung; heat from a propane torch (briefly applied) is usually sufficient to free them.
Preventing C3378 on the Aston Martin Bulldog
For diesel Aston Martin Bulldog owners, a DPF (Diesel Particulate Filter) regeneration run on the motorway every 500 miles prevents soot blockage that back-pressures the exhaust and forces C3378 flags via the pressure differential sensors.
Frequently Asked Questions — Aston Martin Bulldog C3378
A: Not always. Across model years, Aston revised sensor specifications, wiring paths, and ECU calibrations. Always confirm the repair procedure matches your specific vehicle's production year and engine code, as parts and labour times can vary significantly.