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2008 Mazda 3 1.6di Turbo Multi-Code Issue: P0167, P0033, P0100, P0169 - Engine Stalls on Acceleration

Model: 2008 Mazda 3 Fault Code: P0033 Posted: 2018-09-09 04:35

Hello, I own a 2008 Mazda 3 with a 1.6L 110ch turbo diesel engine (1.6di turbo). My car has been running normally until the past two weeks. Currently, when I accelerate, the engine stalls and shuts off unexpectedly. The vehicle starts fine each time, but the issue recurs during acceleration. After diagnostic testing, the OBD2 system shows multiple fault codes: P0167, P0033, P0100, and P0169. I have already replaced the flowmeter with no improvement — the P0100 code returns consistently. The particle filter was inspected 1,000 km ago and shows no signs of smoke or excessive fuel consumption. Any insights into these codes or potential fixes? Thank you in advance for your help.

Related fault codes
P0033P0100P0167P0169
Comments (4)
Anonymous 2018-09-09 15:28

The P0033 code is likely related to turbocharger system issues. Possible causes include: - Faulty turbocharger bypass valve actuator - Defective turbocharger bypass valve - Disconnected, cracked, or collapsed vacuum line (especially if vacuum-actuated) - Malfunctioning boost pressure sensor - Shorted or open wiring in the boost sensor circuit - Loose, corroded, or disconnected electrical connectors in the reference circuit - Faulty Powertrain Control Module (PCM) or boost control unit For more details: https://www.autozone.com/p0033

Anonymous 2018-09-09 15:41

Thank you for the response. I have already purchased and installed a new turbocharger bypass valve actuator and a replacement boost pressure sensor, hoping to resolve the issue. However, why is the P0169 code still appearing? Does this indicate a separate problem or could it be related to the turbo system?

Anonymous 2018-09-19 11:51

Hi, I replaced the boost pressure sensor and now the vehicle can accelerate without immediate stalling. However, the driving experience is still not smooth — acceleration feels sluggish. After clearing the OBD2 codes, all the same faults (P0167, P0033, P0100, P0169) reappear. This suggests a deeper issue that may require further diagnosis. Any recommendations on next steps? Please help.

Anonymous 2018-09-19 16:40

I can't provide specific advice beyond what the error codes suggest. A scan tool capable of reading real-time engine parameters and freeze frame data would be essential to understand the root cause. If you don’t have access to such a tool, it's best to consult a professional mechanic for full system diagnosis before replacing additional components. Regarding P0169: Potential causes include: - Excessive fuel contamination - Defective fuel composition or temperature sensor - Open, shorted, or damaged wiring or connectors - PCM software error or programming issue For more information: https://www.autozone.com/p0169