P2429 — Exhaust Gas Temperature Too High Bank 2

P2429 — Exhaust Gas Temperature Too High Bank 2. A fault in the sensor and actuator circuits. The car is usually drivable while you plan the repair. Typical causes: faulty sensor or actuator of the affected circuit, blown fuse feeding the circuit, control module driver fault.

powertrain (engine/transmission)

Is it safe to drive?

Short-term driving is OK In most cases the car remains drivable, possibly with reduced performance or a disabled auxiliary system. If symptoms include stalling, no-start or brake/steering warnings, treat it as urgent.

How to diagnose with an OBD scanner

  1. Read the code and freeze frame Connect an OBD2 scanner, confirm P2429 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
  2. Check for companion codes and TSBs Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many P0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
  3. Inspect wiring and connectors Visually inspect the wiring harness and connectors related to the exhaust gas temperature too high bank 2 for damage, corrosion, chafing or poor contact.
  4. Subsystem check Measure reference voltage, ground and signal continuity at the component connector.
  5. Subsystem check Wiggle-test the harness while watching the signal in live data — dropouts reveal broken wires.
  6. Verify the repair Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P2429 does not return.

Approximate repair cost

Repair cost depends on which component actually failed. Typical scenarios for P2429 (parts and labor, USD, independent shop rates): Repair wiring or connectors: $80–$250; Control module repair: $300–$1,000; Replace the faulty sensor or actuator: $150–$500. Overall, fixing P2429 usually costs between $80 and $1,000. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.

Common questions

How much does it cost to fix P2429?

Repair wiring or connectors — $80–$250; Control module repair — $300–$1,000; Replace the faulty sensor or actuator — $150–$500. Exact cost depends on the root cause, your vehicle and local labor rates — a proper diagnosis is the cheapest first step.

What is the most common cause of P2429?

The most common causes are: faulty sensor or actuator of the affected circuit, blown fuse feeding the circuit, control module driver fault.

Is it safe to drive with P2429?

In most cases the car remains drivable, possibly with reduced performance or a disabled auxiliary system. If symptoms include stalling, no-start or brake/steering warnings, treat it as urgent.

How do I diagnose P2429 myself?

Start with a scan: confirm P2429, save the freeze frame and note any companion codes. Then inspect the wiring and connectors related to the sensor and actuator circuits, and verify the suspect component against live data before buying parts.

Will P2429 clear itself?

Sometimes P2429 clears after a few drive cycles if the fault was intermittent — for example a loose connector or a tank of bad fuel. The underlying cause usually remains, so the code tends to return. Clear it once; if it comes back, diagnose rather than erase it repeatedly.

What does P2429 mean?

The engine control module sets P2429 when it detects a fault in the sensor and actuator circuits. In practical terms: exhaust gas temperature too high bank 2. The code belongs to the powertrain (engine/transmission) group of OBD2 codes.

“Bank 2” means the side of the engine opposite to cylinder 1. Verify which side that is on your specific engine before testing or replacing parts.

This code does not appear from a single bad reading: the module must see the fault condition repeat under defined operating conditions before it turns on the warning light. The freeze frame captured with P2429 — engine load, rpm, temperature, speed — tells you exactly when the problem occurs, so reproduce those conditions when testing.

Common symptoms of P2429

  • increased fuel consumption in some cases
  • Check Engine Light on
  • possible limp mode depending on the affected component
  • the affected system operates intermittently or not at all

What causes P2429?

  • blown fuse feeding the circuit
  • corroded, loose or damaged connector
  • open or shorted wiring in the circuit
  • poor ground connection
  • control module driver fault
  • faulty sensor or actuator of the affected circuit

How to diagnose P2429

  1. Connect an OBD2 scanner, confirm P2429 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
  2. Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many P0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
  3. Visually inspect the wiring harness and connectors related to the exhaust gas temperature too high bank 2 for damage, corrosion, chafing or poor contact.
  4. Measure reference voltage, ground and signal continuity at the component connector.
  5. Wiggle-test the harness while watching the signal in live data — dropouts reveal broken wires.
  6. Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P2429 does not return.

How to fix P2429

Start with the cheapest and most common causes before replacing expensive parts:

  • Repair wiring or connectors — $80–$250
  • Control module repair — $300–$1,000
  • Replace the faulty sensor or actuator — $150–$500

How much does it cost to fix P2429?

Repair cost depends on which component actually failed. Typical scenarios for P2429 (parts and labor, USD, independent shop rates):

  • Repair wiring or connectors: $80–$250
  • Control module repair: $300–$1,000
  • Replace the faulty sensor or actuator: $150–$500

Overall, fixing P2429 usually costs between $80 and $1,000. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.

Can you drive with P2429?

In most cases the car remains drivable, possibly with reduced performance or a disabled auxiliary system. If symptoms include stalling, no-start or brake/steering warnings, treat it as urgent.

Related OBD2 codes