Parts for your 2007 Mazda Cx-7-Throttle position sensors

2007 Mazda CX-7 Throttle Position Sensors (TPS)

Yes, the 2007 Mazda CX-7 is fitted with throttle position sensors. On this model’s 2.3L DISI turbo (L3‑VDT) engine, the TPS is integrated into the electronic throttle body as dual redundant sensors (often referenced as TP1/TP2) used by the PCM to monitor and control throttle plate angle. This is confirmed by Mazda’s workshop wiring diagrams and diagnostic sections listing TP-related PIDs and DTCs (e.g., P0121–P0123, P0221–P0223, P2135), and by Mazda parts catalogues that supply the throttle body assembly with the sensors built in rather than as a separate bolt-on part.

• Mazda Workshop Manual (2007 CX‑7, L3‑VDT): Electronic Throttle Control System (ETC) diagnostics show TP sensor circuits and correlation checks.
• Mazda Wiring Diagrams: TP1/TP2 signals to the PCM and relevant DTCs (P0121–P0123, P0221–P0223, P2135).
• Mazda Parts Information: Throttle body assembly for CX‑7 (L3‑VDT) supplied as a unit with integrated TP sensors.

On the CX‑7, the throttle position sensors tell the car’s brain exactly where the throttle plate sits, so it can deliver smooth, responsive go without surging or lag. Because it’s drive‑by‑wire, the PCM constantly cross‑checks the two TP sensor tracks against the accelerator pedal position sensors to keep things safe and steady.

When a TPS starts to go out of spec, owners may notice rough idle, hesitant take‑off, limp‑home mode, cruise control dropping out, or the MIL lighting up with codes like P0121 or P2135. A quick scan of live data will usually show mismatched TP1/TP2 readings or erratic voltage.

Servicing tips for the CX‑7 TPS are a bit different because the sensors are built into the throttle body and aren’t a separate service item. If the TPS is faulty, the fix is to replace the throttle body assembly. Here’s the sensible approach:

1. Inspect and clean: With the battery safely disconnected, remove the intake duct and gently clean the throttle bore and plate using throttle‑body‑safe cleaner. Don’t force the plate and don’t soak the unit.
2. Check wiring: Look for chafed loom, loose pins, oil intrusion at the connector, or dodgy earths that can mimic sensor faults.
3. Diagnose before replacing: Use a scan tool to confirm TP1/TP2 agreement and correlation with the pedal sensors. If correlation fails or a TP track is erratic, replacement is on the cards.
4. Replace as an assembly: Fit a quality throttle body with a new gasket. Follow torque specs from the workshop manual and ensure all hoses and clamps are snug under the bonnet.
5. Relearn: After installation, clear codes and perform an idle/throttle relearn (battery reset/KAM clear, then allow the engine to idle without loads until warm). Some scan tools have a throttle/idle learn function that speeds this up.

There’s no set replacement interval—treat it as condition‑based maintenance. Keeping the intake tract clean, air filter fresh, and PCV system healthy goes a long way to preventing premature sensor grief on Aussie and Kiwi roads.

Does the 2007 CX‑7 have a separate TPS or is it built into the throttle body?

It’s built in. The CX‑7 uses an electronic throttle body with dual throttle position sensors inside the unit. If the sensor fails, the whole throttle body is replaced rather than a separate sensor.

What fault codes point to a bad throttle position sensor on a CX‑7?

Common TPS‑related codes include P0121–P0123 (TP sensor range/performance, low, high), P0221–P0223 (TP sensor “B” faults), and P2135 (throttle/pedal position sensor A/B correlation). Always confirm with live data before replacing parts.

Does the throttle need recalibration after replacing the throttle body?

Yes. After fitting, clear codes and perform an idle/throttle relearn. Many scan tools offer a guided procedure, otherwise, a battery KAM reset followed by a stable idle period usually does the trick.